diff --git a/README.md b/README.md
index 3edbe61..07a8ee1 100644
--- a/README.md
+++ b/README.md
@@ -39,9 +39,9 @@ Not relevant.
 
 #### Supported architectures
 
-* x86-64b - [![Build Status](https://ci-apps.yunohost.org/jenkins/job/minidlna%20(Community)/badge/icon)](https://ci-apps.yunohost.org/jenkins/job/minidlna%20(Community)/)
-* ARMv8-A - [![Build Status](https://ci-apps-arm.yunohost.org/jenkins/job/minidlna%20(Community)%20(%7EARM%7E)/badge/icon)](https://ci-apps-arm.yunohost.org/jenkins/job/minidlna%20(Community)%20(%7EARM%7E)/)
-* Jessie x86-64b - [![Build Status](https://ci-stretch.nohost.me/jenkins/job/minidlna%20(Community)/badge/icon)](https://ci-stretch.nohost.me/jenkins/job/minidlna%20(Community)/)
+* x86-64b - [![](https://ci-apps.yunohost.org/ci/logs/minidlna%20%28Community%29.svg)](https://ci-apps.yunohost.org/ci/apps/minidlna/)
+* ARMv8-A - [![](https://ci-apps-arm.yunohost.org/ci/logs/minidlna%20%28Community%29.svg)](https://ci-apps-arm.yunohost.org/ci/apps/minidlna/)
+* Jessie x86-64b - [![](https://ci-stretch.nohost.me/ci/logs/minidlna%20%28Community%29.svg)](https://ci-stretch.nohost.me/ci/apps/minidlna/)
 
 ## Limitations
 
@@ -62,7 +62,7 @@ Please do your pull request to the [testing branch](https://github.com/YunoHost-
 
 To try the testing branch, please proceed like that.
 ```
-sudo yunohost app install https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --verbose
+sudo yunohost app install https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --debug
 or
-sudo yunohost app upgrade minidlna -u https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --verbose
+sudo yunohost app upgrade minidlna -u https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --debug
 ```
diff --git a/README_fr.md b/README_fr.md
index 48971fc..cc23a73 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -39,9 +39,9 @@ Non applicable.
 
 #### Architectures supportées.
 
-* x86-64b - [![Build Status](https://ci-apps.yunohost.org/jenkins/job/minidlna%20(Community)/badge/icon)](https://ci-apps.yunohost.org/jenkins/job/minidlna%20(Community)/)
-* ARMv8-A - [![Build Status](https://ci-apps-arm.yunohost.org/jenkins/job/minidlna%20(Community)%20(%7EARM%7E)/badge/icon)](https://ci-apps-arm.yunohost.org/jenkins/job/minidlna%20(Community)%20(%7EARM%7E)/)
-* Jessie x86-64b - [![Build Status](https://ci-stretch.nohost.me/jenkins/job/minidlna%20(Community)/badge/icon)](https://ci-stretch.nohost.me/jenkins/job/minidlna%20(Community)/)
+* x86-64b - [![](https://ci-apps.yunohost.org/ci/logs/minidlna%20%28Community%29.svg)](https://ci-apps.yunohost.org/ci/apps/minidlna/)
+* ARMv8-A - [![](https://ci-apps-arm.yunohost.org/ci/logs/minidlna%20%28Community%29.svg)](https://ci-apps-arm.yunohost.org/ci/apps/minidlna/)
+* Jessie x86-64b - [![](https://ci-stretch.nohost.me/ci/logs/minidlna%20%28Community%29.svg)](https://ci-stretch.nohost.me/ci/apps/minidlna/)
 
 ## Limitations
 
@@ -62,7 +62,7 @@ Merci de faire vos pull request sur la [branche testing](https://github.com/Yuno
 
 Pour tester la branche testing, merci de procéder ainsi.
 ```
-sudo yunohost app install https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --verbose
+sudo yunohost app install https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --debug
 ou
-sudo yunohost app upgrade minidlna -u https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --verbose
+sudo yunohost app upgrade minidlna -u https://github.com/YunoHost-Apps/minidlna_ynh/tree/testing --debug
 ```
diff --git a/manifest.json b/manifest.json
index e93c31d..ab2477d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
 		"en": "Light DLNA server to share media files over the LAN",
 		"fr": "Serveur DLNA léger pour partager les fichiers multimédia sur le réseau local"
 	},
-	"version": "1.0~ynh3",
+	"version": "1.0~ynh4",
 	"url": "http://minidlna.sourceforge.net/",
 	"license": "GPL-2.0",
 	"maintainer": {
@@ -14,7 +14,7 @@
 		"email": "maniackc_dev@crudelis.fr"
 	},
 	"requirements": {
-		"yunohost": ">= 2.7.14"
+		"yunohost": ">= 3.3.3"
 	},
 	"multi_instance": false,
 	"services": [],
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 8d58e36..caf8bc7 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -49,11 +49,13 @@ bool_to_true_false () {
 }
 
 #=================================================
-# EXPERIMENTAL HELPERS
+# FUTUR OFFICIAL HELPERS
 #=================================================
 
 # Internal helper design to allow helpers to use getopts to manage their arguments
 #
+# [internal]
+#
 # example: function my_helper()
 # {
 #     declare -Ar args_array=( [a]=arg1= [b]=arg2= [c]=arg3 )
@@ -103,33 +105,33 @@ ynh_handle_getopts_args () {
 
 		# For each option in the array, reduce to short options for getopts (e.g. for [u]=user, --user will be -u)
 		# And built parameters string for getopts
-		# ${!args_array[@]} is the list of all keys in the array (A key is 'u' in [u]=user, user is a value)
+		# ${!args_array[@]} is the list of all option_flags in the array (An option_flag is 'u' in [u]=user, user is a value)
 		local getopts_parameters=""
-		local key=""
-		for key in "${!args_array[@]}"
+		local option_flag=""
+		for option_flag in "${!args_array[@]}"
 		do
-			# Concatenate each keys of the array to build the string of arguments for getopts
+			# Concatenate each option_flags of the array to build the string of arguments for getopts
 			# Will looks like 'abcd' for -a -b -c -d
-			# If the value of a key finish by =, it's an option with additionnal values. (e.g. --user bob or -u bob)
-			# Check the last character of the value associate to the key
-			if [ "${args_array[$key]: -1}" = "=" ]
+			# If the value of an option_flag finish by =, it's an option with additionnal values. (e.g. --user bob or -u bob)
+			# Check the last character of the value associate to the option_flag
+			if [ "${args_array[$option_flag]: -1}" = "=" ]
 			then
 				# For an option with additionnal values, add a ':' after the letter for getopts.
-				getopts_parameters="${getopts_parameters}${key}:"
+				getopts_parameters="${getopts_parameters}${option_flag}:"
 			else
-				getopts_parameters="${getopts_parameters}${key}"
+				getopts_parameters="${getopts_parameters}${option_flag}"
 			fi
 			# Check each argument given to the function
 			local arg=""
 			# ${#arguments[@]} is the size of the array
 			for arg in `seq 0 $(( ${#arguments[@]} - 1 ))`
 			do
-				# And replace long option (value of the key) by the short option, the key itself
+				# And replace long option (value of the option_flag) by the short option, the option_flag itself
 				# (e.g. for [u]=user, --user will be -u)
 				# Replace long option with =
-				arguments[arg]="${arguments[arg]//--${args_array[$key]}/-${key} }"
+				arguments[arg]="${arguments[arg]//--${args_array[$option_flag]}/-${option_flag} }"
 				# And long option without =
-				arguments[arg]="${arguments[arg]//--${args_array[$key]%=}/-${key}}"
+				arguments[arg]="${arguments[arg]//--${args_array[$option_flag]%=}/-${option_flag}}"
 			done
 		done
 
@@ -148,10 +150,10 @@ ynh_handle_getopts_args () {
 
 				if [ "$parameter" = "?" ]
 				then
-					ynh_die "Invalid argument: -${OPTARG:-}"
+					ynh_die --message="Invalid argument: -${OPTARG:-}"
 				elif [ "$parameter" = ":" ]
 				then
-					ynh_die "-$OPTARG parameter requires an argument."
+					ynh_die --message="-$OPTARG parameter requires an argument."
 				else
 					local shift_value=1
 					# Use the long option, corresponding to the short option read by getopts, as a variable
@@ -179,19 +181,20 @@ ynh_handle_getopts_args () {
 							shift_value=$(( shift_value - 1 ))
 						fi
 
+						# Declare the content of option_var as a variable.
+						eval ${option_var}=""
 						# Then read the array value per value
+						local i
 						for i in `seq 0 $(( ${#all_args[@]} - 1 ))`
 						do
 							# If this argument is an option, end here.
-							if [ "${all_args[$i]:0:1}" == "-" ] || [ -z "${all_args[$i]}" ]
+							if [ "${all_args[$i]:0:1}" == "-" ]
 							then
 								# Ignore the first value of the array, which is the option itself
 								if [ "$i" -ne 0 ]; then
 									break
 								fi
 							else
-								# Declare the content of option_var as a variable.
-								eval ${option_var}=""
 								# Else, add this value to this option
 								# Each value will be separated by ';'
 								if [ -n "${!option_var}" ]
@@ -215,25 +218,33 @@ ynh_handle_getopts_args () {
 		# Check if there's getopts arguments
 		if [ "${arguments[0]:0:1}" != "-" ]
 		then
-			# If not, enter in legacy mode and manage the arguments as positionnal ones.
-			echo "! Helper used in legacy mode !"
+			# If not, enter in legacy mode and manage the arguments as positionnal ones..
+			# Dot not echo, to prevent to go through a helper output. But print only in the log.
+			set -x; echo "! Helper used in legacy mode !" > /dev/null; set +x
+			local i
 			for i in `seq 0 $(( ${#arguments[@]} -1 ))`
 			do
-				# Use getopts_parameters as a list of key of the array args_array
+				# Try to use legacy_args as a list of option_flag of the array args_array
+				# Otherwise, fallback to getopts_parameters to get the option_flag. But an associative arrays isn't always sorted in the correct order...
 				# Remove all ':' in getopts_parameters
-				getopts_parameters=${getopts_parameters//:}
-				# Get the key from getopts_parameters, by using the key according to the position of the argument.
-				key=${getopts_parameters:$i:1}
-				# Use the long option, corresponding to the key, as a variable
+				getopts_parameters=${legacy_args:-${getopts_parameters//:}}
+				# Get the option_flag from getopts_parameters, by using the option_flag according to the position of the argument.
+				option_flag=${getopts_parameters:$i:1}
+				if [ -z "$option_flag" ]; then
+						ynh_print_warn --message="Too many arguments ! \"${arguments[$i]}\" will be ignored."
+						continue
+				fi
+				# Use the long option, corresponding to the option_flag, as a variable
 				# (e.g. for [u]=user, 'user' will be used as a variable)
 				# Also, remove '=' at the end of the long option
 				# The variable name will be stored in 'option_var'
-				local option_var="${args_array[$key]%=}"
+				local option_var="${args_array[$option_flag]%=}"
 
 				# Store each value given as argument in the corresponding variable
 				# The values will be stored in the same order than $args_array
 				eval ${option_var}+=\"${arguments[$i]}\"
 			done
+			unset legacy_args
 		else
 			# END LEGACY MODE
 			# Call parse_arg and pass the modified list of args as an array of arguments.
@@ -245,197 +256,28 @@ ynh_handle_getopts_args () {
 
 #=================================================
 
-# Start or restart a service and follow its booting
-#
-# usage: ynh_check_starting "Line to match" [Log file] [Timeout] [Service name]
-#
-# | arg: -m, --line_to_match= - Line to match - The line to find in the log to attest the service have finished to boot.
-# | arg: -l, --app_log= - Log file - The log file to watch; specify "systemd" to read systemd journal for specified service
-#    /var/log/$app/$app.log will be used if no other log is defined.
-# | arg: -t, --timeout= - Timeout - The maximum time to wait before ending the watching. Defaut 300 seconds.
-# | arg: -n, --service_name= - Service name
-
-ynh_check_starting () {
-	# Declare an array to define the options of this helper.
-	declare -Ar args_array=( [m]=line_to_match= [l]=app_log= [t]=timeout= [n]=service_name= )
-	local line_to_match
-	local app_log
-	local timeout
-	local service_name
-	# Manage arguments with getopts
-	ynh_handle_getopts_args "$@"
-	local app_log="${app_log:-/var/log/$service_name/$service_name.log}"
-	local timeout=${timeout:-300}
-	local service_name="${service_name:-$app}"
-
-	echo "Starting of $service_name" >&2
-	systemctl stop $service_name
-	local templog="$(mktemp)"
-	# Following the starting of the app in its log
-	if [ "$app_log" == "systemd" ] ; then
-		# Read the systemd journal
-		journalctl -u $service_name -f --since=-45 > "$templog" &
-	else
-		# Read the specified log file
-		tail -F -n0 "$app_log" > "$templog" &
-	fi
-	# Get the PID of the last command
-	local pid_tail=$!
-	systemctl start $service_name
-
-	local i=0
-	for i in `seq 1 $timeout`
-	do
-		# Read the log until the sentence is found, which means the app finished starting. Or run until the timeout.
-		if grep --quiet "$line_to_match" "$templog"
-		then
-			echo "The service $service_name has correctly started." >&2
-			break
-		fi
-		echo -n "." >&2
-		sleep 1
-	done
-	if [ $i -eq $timeout ]
-	then
-		echo "The service $service_name didn't fully start before the timeout." >&2
-	fi
-
-	echo ""
-	ynh_clean_check_starting
-}
-
-# Clean temporary process and file used by ynh_check_starting
-# (usually used in ynh_clean_setup scripts)
-#
-# usage: ynh_clean_check_starting
-ynh_clean_check_starting () {
-	# Stop the execution of tail.
-	kill -s 15 $pid_tail 2>&1
-	ynh_secure_remove "$templog" 2>&1
-}
-
-#=================================================
-
-ynh_print_log () {
-  echo "${1}"
-}
-
-# Print an info on stdout
-#
-# usage: ynh_print_info "Text to print"
-# | arg: text - The text to print
-ynh_print_info () {
-  ynh_print_log "[INFO] ${1}"
-}
-
-# Print a warning on stderr
-#
-# usage: ynh_print_warn "Text to print"
-# | arg: text - The text to print
-ynh_print_warn () {
-  ynh_print_log "[WARN] ${1}" >&2
-}
-
-# Print a error on stderr
-#
-# usage: ynh_print_err "Text to print"
-# | arg: text - The text to print
-ynh_print_err () {
-  ynh_print_log "[ERR] ${1}" >&2
-}
-
-# Execute a command and print the result as an error
-#
-# usage: ynh_exec_err command to execute
-# usage: ynh_exec_err "command to execute | following command"
-# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
-#
-# | arg: command - command to execute
-ynh_exec_err () {
-	ynh_print_err "$(eval $@)"
-}
-
-# Execute a command and print the result as a warning
-#
-# usage: ynh_exec_warn command to execute
-# usage: ynh_exec_warn "command to execute | following command"
-# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
-#
-# | arg: command - command to execute
-ynh_exec_warn () {
-	ynh_print_warn "$(eval $@)"
-}
-
-# Execute a command and force the result to be printed on stdout
-#
-# usage: ynh_exec_warn_less command to execute
-# usage: ynh_exec_warn_less "command to execute | following command"
-# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
-#
-# | arg: command - command to execute
-ynh_exec_warn_less () {
-	eval $@ 2>&1
-}
-
-# Execute a command and redirect stdout in /dev/null
-#
-# usage: ynh_exec_quiet command to execute
-# usage: ynh_exec_quiet "command to execute | following command"
-# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
-#
-# | arg: command - command to execute
-ynh_exec_quiet () {
-	eval $@ > /dev/null
-}
-
-# Execute a command and redirect stdout and stderr in /dev/null
-#
-# usage: ynh_exec_fully_quiet command to execute
-# usage: ynh_exec_fully_quiet "command to execute | following command"
-# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
-#
-# | arg: command - command to execute
-ynh_exec_fully_quiet () {
-	eval $@ > /dev/null 2>&1
-}
-
-# Remove any logs for all the following commands.
-#
-# usage: ynh_print_OFF
-# WARNING: You should be careful with this helper, and never forgot to use ynh_print_ON as soon as possible to restore the logging.
-ynh_print_OFF () {
-	set +x
-}
-
-# Restore the logging after ynh_print_OFF
-#
-# usage: ynh_print_ON
-ynh_print_ON () {
-	set -x
-	# Print an echo only for the log, to be able to know that ynh_print_ON has been called.
-	echo ynh_print_ON > /dev/null
-}
-
-#=================================================
-
 # Install or update the main directory yunohost.multimedia
 #
 # usage: ynh_multimedia_build_main_dir
 ynh_multimedia_build_main_dir () {
-        local ynh_media_release="v1.0"
-        local checksum="4852c8607db820ad51f348da0dcf0c88"
+	local ynh_media_release="v1.2"
+	local checksum="806a827ba1902d6911095602a9221181"
 
-        # Download yunohost.multimedia scripts
-        wget -nv https://github.com/YunoHost-Apps/yunohost.multimedia/archive/${ynh_media_release}.tar.gz 
+	# Download yunohost.multimedia scripts
+	wget -nv https://github.com/YunoHost-Apps/yunohost.multimedia/archive/${ynh_media_release}.tar.gz
 
-        # Check the control sum
-        echo "${checksum} ${ynh_media_release}.tar.gz" | md5sum -c --status \
-                || ynh_die "Corrupt source"
+	# Check the control sum
+	echo "${checksum} ${ynh_media_release}.tar.gz" | md5sum -c --status \
+		|| ynh_die "Corrupt source"
 
-        # Extract
-        mkdir yunohost.multimedia-master
-        tar -xf ${ynh_media_release}.tar.gz -C yunohost.multimedia-master --strip-components 1
-        ./yunohost.multimedia-master/script/ynh_media_build.sh
+	# Check if the package acl is installed. Or install it.
+	ynh_package_is_installed 'acl' \
+		|| ynh_package_install acl
+
+	# Extract
+	mkdir yunohost.multimedia-master
+	tar -xf ${ynh_media_release}.tar.gz -C yunohost.multimedia-master --strip-components 1
+	./yunohost.multimedia-master/script/ynh_media_build.sh
 }
 
 # Add a directory in yunohost.multimedia
@@ -496,26 +338,31 @@ ynh_multimedia_addaccess () {
 # Create a dedicated fail2ban config (jail and filter conf files)
 #
 # usage: ynh_add_fail2ban_config log_file filter [max_retry [ports]]
-# | arg: log_file - Log file to be checked by fail2ban
-# | arg: failregex - Failregex to be looked for by fail2ban
-# | arg: max_retry - Maximum number of retries allowed before banning IP address - default: 3
-# | arg: ports - Ports blocked for a banned IP address - default: http,https
+# | arg: -l, --logpath= - Log file to be checked by fail2ban
+# | arg: -r, --failregex= - Failregex to be looked for by fail2ban
+# | arg: -m, --max_retry= - Maximum number of retries allowed before banning IP address - default: 3
+# | arg: -p, --ports= - Ports blocked for a banned IP address - default: http,https
 ynh_add_fail2ban_config () {
-   # Process parameters
-   logpath=$1
-   failregex=$2
-   max_retry=${3:-3}
-   ports=${4:-http,https}
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [l]=logpath= [r]=failregex= [m]=max_retry= [p]=ports= )
+	local logpath
+	local failregex
+	local max_retry
+	local ports
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	max_retry=${max_retry:-3}
+	ports=${ports:-http,https}
 
-  test -n "$logpath" || ynh_die "ynh_add_fail2ban_config expects a logfile path as first argument and received nothing."
-  test -n "$failregex" || ynh_die "ynh_add_fail2ban_config expects a failure regex as second argument and received nothing."
+	test -n "$logpath" || ynh_die "ynh_add_fail2ban_config expects a logfile path as first argument and received nothing."
+	test -n "$failregex" || ynh_die "ynh_add_fail2ban_config expects a failure regex as second argument and received nothing."
 
-  finalfail2banjailconf="/etc/fail2ban/jail.d/$app.conf"
-  finalfail2banfilterconf="/etc/fail2ban/filter.d/$app.conf"
-  ynh_backup_if_checksum_is_different "$finalfail2banjailconf" 1
-  ynh_backup_if_checksum_is_different "$finalfail2banfilterconf" 1
+	finalfail2banjailconf="/etc/fail2ban/jail.d/$app.conf"
+	finalfail2banfilterconf="/etc/fail2ban/filter.d/$app.conf"
+	ynh_backup_if_checksum_is_different "$finalfail2banjailconf" 1
+	ynh_backup_if_checksum_is_different "$finalfail2banfilterconf" 1
 
-  sudo tee $finalfail2banjailconf <<EOF
+	tee $finalfail2banjailconf <<EOF
 [$app]
 enabled = true
 port = $ports
@@ -524,7 +371,7 @@ logpath = $logpath
 maxretry = $max_retry
 EOF
 
-  sudo tee $finalfail2banfilterconf <<EOF
+  tee $finalfail2banfilterconf <<EOF
 [INCLUDES]
 before = common.conf
 [Definition]
@@ -532,25 +379,33 @@ failregex = $failregex
 ignoreregex =
 EOF
 
-  ynh_store_file_checksum "$finalfail2banjailconf"
-  ynh_store_file_checksum "$finalfail2banfilterconf"
+	ynh_store_file_checksum "$finalfail2banjailconf"
+	ynh_store_file_checksum "$finalfail2banfilterconf"
 
-  systemctl restart fail2ban
-  local fail2ban_error="$(journalctl -u fail2ban | tail -n50 | grep "WARNING.*$app.*")"
-  if [ -n "$fail2ban_error" ]
-  then
-    echo "[ERR] Fail2ban failed to load the jail for $app" >&2
-    echo "WARNING${fail2ban_error#*WARNING}" >&2
-  fi
+	if [ "$(lsb_release --codename --short)" != "jessie" ]; then
+		systemctl reload fail2ban
+	else
+		systemctl restart fail2ban
+	fi
+	local fail2ban_error="$(journalctl -u fail2ban | tail -n50 | grep "WARNING.*$app.*")"
+	if [ -n "$fail2ban_error" ]
+	then
+		echo "[ERR] Fail2ban failed to load the jail for $app" >&2
+		echo "WARNING${fail2ban_error#*WARNING}" >&2
+	fi
 }
 
 # Remove the dedicated fail2ban config (jail and filter conf files)
 #
 # usage: ynh_remove_fail2ban_config
 ynh_remove_fail2ban_config () {
-  ynh_secure_remove "/etc/fail2ban/jail.d/$app.conf"
-  ynh_secure_remove "/etc/fail2ban/filter.d/$app.conf"
-  systemctl restart fail2ban
+	ynh_secure_remove "/etc/fail2ban/jail.d/$app.conf"
+	ynh_secure_remove "/etc/fail2ban/filter.d/$app.conf"
+	if [ "$(lsb_release --codename --short)" != "jessie" ]; then
+		systemctl reload fail2ban
+	else
+		systemctl restart fail2ban
+	fi
 }
 
 #=================================================
@@ -558,12 +413,17 @@ ynh_remove_fail2ban_config () {
 # Read the value of a key in a ynh manifest file
 #
 # usage: ynh_read_manifest manifest key
-# | arg: manifest - Path of the manifest to read
-# | arg: key - Name of the key to find
+# | arg: -m, --manifest= - Path of the manifest to read
+# | arg: -k, --key= - Name of the key to find
 ynh_read_manifest () {
-	manifest="$1"
-	key="$2"
-	python3 -c "import sys, json;print(json.load(open('$manifest', encoding='utf-8'))['$key'])"
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [m]=manifest= [k]=manifest_key= )
+	local manifest
+	local manifest_key
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	python3 -c "import sys, json;print(json.load(open('$manifest', encoding='utf-8'))['$manifest_key'])"
 }
 
 # Read the upstream version from the manifest
@@ -572,16 +432,21 @@ ynh_read_manifest () {
 # This include the number before ~ynh
 # In the last example it return 4.3-2
 #
-# usage: ynh_app_upstream_version
+# usage: ynh_app_upstream_version [-m manifest]
+# | arg: -m, --manifest= - Path of the manifest to read
 ynh_app_upstream_version () {
-    manifest_path="../manifest.json"
-    if [ ! -e "$manifest_path" ]; then
-        manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
-    fi
-    version_key=$(ynh_read_manifest "$manifest_path" "version")
-    echo "${version_key/~ynh*/}"
-}
+	declare -Ar args_array=( [m]=manifest= )
+	local manifest
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
 
+	manifest="${manifest:-../manifest.json}"
+	if [ ! -e "$manifest" ]; then
+		manifest="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
+	fi
+	version_key=$(ynh_read_manifest --manifest="$manifest" --manifest_key="version")
+	echo "${version_key/~ynh*/}"
+}
 
 # Read package version from the manifest
 # The version number in the manifest is defined by <upstreamversion>~ynh<packageversion>
@@ -589,14 +454,20 @@ ynh_app_upstream_version () {
 # This include the number after ~ynh
 # In the last example it return 3
 #
-# usage: ynh_app_package_version
+# usage: ynh_app_package_version [-m manifest]
+# | arg: -m, --manifest= - Path of the manifest to read
 ynh_app_package_version () {
-    manifest_path="../manifest.json"
-    if [ ! -e "$manifest_path" ]; then
-        manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
-    fi
-    version_key=$(ynh_read_manifest "$manifest_path" "version")
-    echo "${version_key/*~ynh/}"
+	declare -Ar args_array=( [m]=manifest= )
+	local manifest
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	manifest="${manifest:-../manifest.json}"
+	if [ ! -e "$manifest" ]; then
+		manifest="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
+	fi
+	version_key=$(ynh_read_manifest --manifest="$manifest" --manifest_key="version")
+	echo "${version_key/*~ynh/}"
 }
 
 # Checks the app version to upgrade with the existing app version and returns:
@@ -611,58 +482,173 @@ ynh_app_package_version () {
 # To force an upgrade, even if the package is up to date,
 # you have to set the variable YNH_FORCE_UPGRADE before.
 # example: sudo YNH_FORCE_UPGRADE=1 yunohost app upgrade MyApp
-
+#
 # usage: ynh_check_app_version_changed
 ynh_check_app_version_changed () {
-  local force_upgrade=${YNH_FORCE_UPGRADE:-0}
-  local package_check=${PACKAGE_CHECK_EXEC:-0}
+	local force_upgrade=${YNH_FORCE_UPGRADE:-0}
+	local package_check=${PACKAGE_CHECK_EXEC:-0}
 
-  # By default, upstream app version has changed
-  local return_value="UPGRADE_APP"
+	# By default, upstream app version has changed
+	local return_value="UPGRADE_APP"
 
-  local current_version=$(ynh_read_manifest "/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json" "version" || echo 1.0)
-  local current_upstream_version="${current_version/~ynh*/}"
-  local update_version=$(ynh_read_manifest "../manifest.json" "version" || echo 1.0)
-  local update_upstream_version="${update_version/~ynh*/}"
+	local current_version=$(ynh_read_manifest --manifest="/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json" --manifest_key="version" || echo 1.0)
+	local current_upstream_version="$(ynh_app_upstream_version --manifest="/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json")"
+	local update_version=$(ynh_read_manifest --manifest="../manifest.json" --manifest_key="version" || echo 1.0)
+	local update_upstream_version="$(ynh_app_upstream_version)"
 
-  if [ "$current_version" == "$update_version" ] ; then
-      # Complete versions are the same
-      if [ "$force_upgrade" != "0" ]
-      then
-        echo "Upgrade forced by YNH_FORCE_UPGRADE." >&2
-        unset YNH_FORCE_UPGRADE
-      elif [ "$package_check" != "0" ]
-      then
-        echo "Upgrade forced for package check." >&2
-      else
-        ynh_die "Up-to-date, nothing to do" 0
-      fi
-  elif [ "$current_upstream_version" == "$update_upstream_version" ] ; then
-    # Upstream versions are the same, only YunoHost package versions differ
-    return_value="UPGRADE_PACKAGE"
-  fi
-  echo $return_value
+	if [ "$current_version" == "$update_version" ] ; then
+		# Complete versions are the same
+		if [ "$force_upgrade" != "0" ]
+		then
+			echo "Upgrade forced by YNH_FORCE_UPGRADE." >&2
+			unset YNH_FORCE_UPGRADE
+		elif [ "$package_check" != "0" ]
+		then
+			echo "Upgrade forced for package check." >&2
+		else
+			ynh_die "Up-to-date, nothing to do" 0
+		fi
+	elif [ "$current_upstream_version" == "$update_upstream_version" ] ; then
+		# Upstream versions are the same, only YunoHost package versions differ
+		return_value="UPGRADE_PACKAGE"
+	fi
+	echo $return_value
+}
+
+#=================================================
+
+# Delete a file checksum from the app settings
+#
+# $app should be defined when calling this helper
+#
+# usage: ynh_remove_file_checksum file
+# | arg: -f, --file= - The file for which the checksum will be deleted
+ynh_delete_file_checksum () {
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [f]=file= )
+	local file
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	local checksum_setting_name=checksum_${file//[\/ ]/_}	# Replace all '/' and ' ' by '_'
+	ynh_app_setting_delete $app $checksum_setting_name
+}
+
+#=================================================
+# EXPERIMENTAL HELPERS
+#=================================================
+
+# Start (or other actions) a service,  print a log in case of failure and optionnaly wait until the service is completely started
+#
+# usage: ynh_systemd_action [-n service_name] [-a action] [ [-l "line to match"] [-p log_path] [-t timeout] [-e length] ]
+# | arg: -n, --service_name= - Name of the service to reload. Default : $app
+# | arg: -a, --action=       - Action to perform with systemctl. Default: start
+# | arg: -l, --line_match=   - Line to match - The line to find in the log to attest the service have finished to boot.
+#                              If not defined it don't wait until the service is completely started.
+# | arg: -p, --log_path=     - Log file - Path to the log file. Default : /var/log/$app/$app.log
+# | arg: -t, --timeout=      - Timeout - The maximum time to wait before ending the watching. Default : 300 seconds.
+# | arg: -e, --length=       - Length of the error log : Default : 20
+ynh_systemd_action() {
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [n]=service_name= [a]=action= [l]=line_match= [p]=log_path= [t]=timeout= [e]=length= )
+	local service_name
+	local action
+	local line_match
+	local length
+	local log_path
+	local timeout
+
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	local service_name="${service_name:-$app}"
+	local action=${action:-start}
+	local log_path="${log_path:-/var/log/$service_name/$service_name.log}"
+	local length=${length:-20}
+	local timeout=${timeout:-300}
+
+	# Start to read the log
+	if [[ -n "${line_match:-}" ]]
+	then
+		local templog="$(mktemp)"
+	# Following the starting of the app in its log
+	if [ "$log_path" == "systemd" ] ; then
+		# Read the systemd journal
+		journalctl -u $service_name -f --since=-45 > "$templog" &
+	else
+		# Read the specified log file
+		tail -F -n0 "$log_path" > "$templog" &
+	fi
+		# Get the PID of the tail command
+		local pid_tail=$!
+	fi
+
+	echo "${action^} the service $service_name" >&2
+	systemctl $action $service_name \
+		|| ( journalctl --lines=$length -u $service_name >&2 \
+		; test -n "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2 \
+		; false )
+
+	# Start the timeout and try to find line_match
+	if [[ -n "${line_match:-}" ]]
+	then
+		local i=0
+		for i in $(seq 1 $timeout)
+		do
+			# Read the log until the sentence is found, that means the app finished to start. Or run until the timeout
+			if grep --quiet "$line_match" "$templog"
+			then
+				echo "The service $service_name has correctly started." >&2
+				break
+			fi
+			echo -n "." >&2
+			sleep 1
+		done
+		if [ $i -eq $timeout ]
+		then
+			echo "The service $service_name didn't fully started before the timeout." >&2
+			echo "Please find here an extract of the end of the log of the service $service_name:"
+			journalctl --lines=$length -u $service_name >&2
+			test -n "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2
+		fi
+
+		echo ""
+		ynh_clean_check_starting
+	fi
+}
+
+# Clean temporary process and file used by ynh_check_starting
+# (usually used in ynh_clean_setup scripts)
+#
+# usage: ynh_clean_check_starting
+ynh_clean_check_starting () {
+	# Stop the execution of tail.
+	kill -s 15 $pid_tail 2>&1
+	ynh_secure_remove "$templog" 2>&1
 }
 
 #=================================================
 
 # Send an email to inform the administrator
 #
-# usage: ynh_send_readme_to_admin app_message [recipients]
+# usage: ynh_send_readme_to_admin --app_message=app_message [--recipients=recipients] [--type=type]
 # | arg: -m --app_message= - The message to send to the administrator.
 # | arg: -r, --recipients= - The recipients of this email. Use spaces to separate multiples recipients. - default: root
 #	example: "root admin@domain"
 #	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
 #	example: "root admin@domain user1 user2"
+# | arg: -t, --type= - Type of mail, could be 'backup', 'change_url', 'install', 'remove', 'restore', 'upgrade'
 ynh_send_readme_to_admin() {
 	# Declare an array to define the options of this helper.
-	declare -Ar args_array=( [m]=app_message= [r]=recipients= )
+	declare -Ar args_array=( [m]=app_message= [r]=recipients= [t]=type= )
 	local app_message
 	local recipients
+	local type
 	# Manage arguments with getopts
 	ynh_handle_getopts_args "$@"
-	local app_message="${app_message:-...No specific information...}"
-	local recipients="${recipients:-root}"
+	app_message="${app_message:-...No specific information...}"
+	recipients="${recipients:-root}"
+	type="${type:-install}"
 
 	# Retrieve the email of users
 	find_mails () {
@@ -688,7 +674,23 @@ ynh_send_readme_to_admin() {
 	}
 	recipients=$(find_mails "$recipients")
 
-	local mail_subject="☁️🆈🅽🅷☁️: \`$app\` was just installed!"
+	# Subject base
+	local mail_subject="☁️🆈🅽🅷☁️: \`$app\`"
+
+	# Adapt the subject according to the type of mail required.
+	if [ "$type" = "backup" ]; then
+		mail_subject="$mail_subject has just been backup."
+	elif [ "$type" = "change_url" ]; then
+		mail_subject="$mail_subject has just been moved to a new URL!"
+	elif [ "$type" = "remove" ]; then
+		mail_subject="$mail_subject has just been removed!"
+	elif [ "$type" = "restore" ]; then
+		mail_subject="$mail_subject has just been restored!"
+	elif [ "$type" = "upgrade" ]; then
+		mail_subject="$mail_subject has just been upgraded!"
+	else	# install
+		mail_subject="$mail_subject has just been installed!"
+	fi
 
 	local mail_message="This is an automated message from your beloved YunoHost server.
 
@@ -715,26 +717,6 @@ $(yunohost tools diagnosis | grep -B 100 "services:" | sed '/services:/d')"
 
 #=================================================
 
-# Reload (or other actions) a service and print a log in case of failure.
-#
-# usage: ynh_system_reload service_name [action]
-# | arg: -n, --service_name= - Name of the service to reload
-# | arg: -a, --action= - Action to perform with systemctl. Default: reload
-ynh_system_reload () {
-        # Declare an array to define the options of this helper.
-        declare -Ar args_array=( [n]=service_name= [a]=action= )
-        local service_name
-        local action
-        # Manage arguments with getopts
-        ynh_handle_getopts_args "$@"
-        local action=${action:-reload}
-
-        # Reload, restart or start and print the log if the service fail to start or reload
-        systemctl $action $service_name || ( journalctl --lines=20 -u $service_name >&2 && false)
-}
-
-#=================================================
-
 ynh_debian_release () {
 	lsb_release --codename --short
 }
@@ -759,19 +741,6 @@ is_jessie () {
 
 #=================================================
 
-# Delete a file checksum from the app settings
-#
-# $app should be defined when calling this helper
-#
-# usage: ynh_remove_file_checksum file
-# | arg: file - The file for which the checksum will be deleted
-ynh_delete_file_checksum () {
-	local checksum_setting_name=checksum_${1//[\/ ]/_}	# Replace all '/' and ' ' by '_'
-	ynh_app_setting_delete $app $checksum_setting_name
-}
-
-#=================================================
-
 ynh_maintenance_mode_ON () {
 	# Load value of $path_url and $domain from the config if their not set
 	if [ -z $path_url ]; then
@@ -848,3 +817,69 @@ ynh_maintenance_mode_OFF () {
 
 	systemctl reload nginx
 }
+
+#=================================================
+
+# Download and check integrity of a file from app.src_file
+#
+# The file conf/app.src_file need to contains:
+#
+# FILE_URL=Address to download the file
+# FILE_SUM=Control sum
+# # (Optional) Program to check the integrity (sha256sum, md5sum...)
+# # default: sha256
+# FILE_SUM_PRG=sha256
+# # (Optionnal) Name of the local archive (offline setup support)
+# # default: Name of the downloaded file.
+# FILENAME=example.deb
+#
+# usage: ynh_download_file --dest_dir="/destination/directory" [--source_id=myfile]
+# | arg: -d, --dest_dir=  - Directory where to download the file
+# | arg: -s, --source_id= - Name of the source file 'app.src_file' if it isn't '$app'
+ynh_download_file () {
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [d]=dest_dir= [s]=source_id= )
+	local dest_dir
+	local source_id
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	source_id=${source_id:-app} # If the argument is not given, source_id equals "$app"
+
+	# Load value from configuration file (see above for a small doc about this file
+	# format)
+	local src_file="$YNH_CWD/../conf/${source_id}.src_file"
+	# If the src_file doesn't exist, use the backup path instead, with a "settings" directory
+	if [ ! -e "$src_file" ]
+	then
+		src_file="$YNH_CWD/../settings/conf/${source_id}.src_file"
+	fi
+	local file_url=$(grep 'FILE_URL=' "$src_file" | cut -d= -f2-)
+	local file_sum=$(grep 'FILE_SUM=' "$src_file" | cut -d= -f2-)
+	local file_sumprg=$(grep 'FILE_SUM_PRG=' "$src_file" | cut -d= -f2-)
+	local filename=$(grep 'FILENAME=' "$src_file" | cut -d= -f2-)
+
+	# Default value
+	file_sumprg=${file_sumprg:-sha256sum}
+	if [ "$filename" = "" ] ; then
+		filename="$(basename "$file_url")"
+	fi
+	local local_src="/opt/yunohost-apps-src/${YNH_APP_ID}/${filename}"
+
+	if test -e "$local_src"
+	then    # Use the local source file if it is present
+		cp $local_src $filename
+	else    # If not, download the source
+		local out=`wget -nv -O $filename $file_url 2>&1` || ynh_print_err $out
+	fi
+
+	# Check the control sum
+	echo "${file_sum} ${filename}" | ${file_sumprg} -c --status \
+		|| ynh_die "Corrupt file"
+
+	# Create the destination directory, if it's not already.
+	mkdir -p "$dest_dir"
+
+	# Move the file to its destination
+	mv $filename $dest_dir
+}
diff --git a/scripts/actions/install_backports b/scripts/actions/install_backports
index 0b76cc8..4a58b51 100755
--- a/scripts/actions/install_backports
+++ b/scripts/actions/install_backports
@@ -38,7 +38,7 @@ fi
 ynh_package_remove minidlna
 
 # Then install the version from backports
-codename=$(lsb_release -a 2>/dev/null | grep Codename | cut -f 2)
+codename=$(ynh_debian_release)
 test -z "$codename" && (ynh_die "codename empty")
 
 ynh_replace_string "__CODENAME__" "$codename" /etc/yunohost/apps/$app/conf/minidlna.list
diff --git a/scripts/actions/reset_db b/scripts/actions/reset_db
index 1de734c..81e73d1 100755
--- a/scripts/actions/reset_db
+++ b/scripts/actions/reset_db
@@ -32,6 +32,6 @@ app=${YNH_APP_INSTANCE_NAME:-$YNH_APP_ID}
 # Get the last value for `db_dir` in the config file of minidlna
 db_directory=$(tac /etc/minidlna.conf | grep --max-count=1 "db_dir=" | cut -d'=' -f 2)
 
-ynh_system_reload --service_name=minidlna --action=stop
+ynh_systemd_action --action=stop --service_name=minidlna
 ynh_secure_remove "$db_directory/files.db"
-ynh_system_reload --service_name=minidlna --action=start
+ynh_systemd_action --action=start --service_name=minidlna
diff --git a/scripts/backup b/scripts/backup
index a6f5839..0b6ccb7 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -30,20 +30,19 @@ version=$(ynh_app_setting_get $app version)
 # BACKUP OF THE APT SOURCE
 #=================================================
 
-# Copie des fichiers spécifiques à l'application
 if [ $version = "B" ]
 then
 	ynh_backup "/etc/apt/sources.list.d/minidlna.list"
 fi
 
 #=================================================
-# BACKUP OF THE INOTIFY'S CONFIG
+# BACKUP OF INOTIFY'S CONFIG
 #=================================================
 
 ynh_backup "/etc/sysctl.d/90-inotify_minidlna.conf"
 
 #=================================================
-# BACKUP OF THE CONFIG OF MINIDLNA
+# BACKUP OF MINIDLNA CONFIGURATION
 #=================================================
 
 ynh_backup "/etc/minidlna.conf"
diff --git a/scripts/config b/scripts/config
index c5bd9a1..92939cd 100644
--- a/scripts/config
+++ b/scripts/config
@@ -113,7 +113,7 @@ apply_config() {
 
 	if [ $restart_minidlna -eq 1 ]
 	then
-		ynh_system_reload --service_name=minidlna --action=restart
+		ynh_systemd_action --action=restart --service_name=minidlna
 	fi
 
 	# Set overwrite_settings
diff --git a/scripts/install b/scripts/install
index bb5ac78..326bf4d 100644
--- a/scripts/install
+++ b/scripts/install
@@ -13,7 +13,8 @@ source /usr/share/yunohost/helpers
 # MANAGE FAILURE OF THE SCRIPT
 #=================================================
 
-ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est détectée.
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
 
 #=================================================
 # RETRIEVE ARGUMENTS FROM THE MANIFEST
@@ -22,11 +23,18 @@ ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est dét
 version="$YNH_APP_ARG_VERSION"
 app=$YNH_APP_INSTANCE_NAME
 
+#=================================================
+# STORE SETTINGS FROM MANIFEST
+#=================================================
+
+ynh_app_setting_set $app version ${version:0:1}
+ynh_app_setting_set $app overwrite_settings "1"
+
 #=================================================
 # CHECK THE DEBIAN'S CODENAME
 #=================================================
 
-codename=$(lsb_release -a 2>/dev/null | grep Codename | cut -f 2)
+codename=$(ynh_debian_release)
 test -z "$codename" && (ynh_die "codename empty")
 
 #=================================================
@@ -35,17 +43,15 @@ test -z "$codename" && (ynh_die "codename empty")
 # FIND AND OPEN A PORT
 #=================================================
 
-port=$(ynh_find_port 48200)	# Cherche un port libre.
+# Find a free port
+port=$(ynh_find_port 48200)
 
-# Ouvre les ports dans le firewall
+# Open ports
 ynh_exec_fully_quiet yunohost firewall allow --no-upnp TCP $port
-ynh_exec_fully_quiet yunohost firewall allow --no-upnp UDP 1900	# Découverte SSDP pour UPNP.
+# Discovery Protocol SSDP for UPNP.
+ynh_exec_fully_quiet yunohost firewall allow --no-upnp UDP 1900
 ynh_app_setting_set $app port $port
 
-# Enregistre les infos dans la config YunoHost
-ynh_app_setting_set $app version ${version:0:1}
-ynh_app_setting_set $app overwrite_settings "1"
-
 #=================================================
 # CREATE YUNOHOST.MULTIMEDIA DIRECTORY
 #=================================================
@@ -58,14 +64,15 @@ ynh_multimedia_build_main_dir
 # INSTALL MINIDLNA
 #=================================================
 
-# Installation du paquet minidlna et ses dépendances
 if [ ${version:0:1} = "B" ]
-then	# Installation de la version minidlna disponible dans backport. (En cas de problème avec la version actuelle des dépots)
+then
+	# Install the backport version. (If you have issues with the standard version from the stable repository)
 	ynh_replace_string "__CODENAME__" "$codename" ../conf/minidlna.list
 	cp -a ../conf/minidlna.list /etc/apt/sources.list.d/
 	ynh_apt update
 	ynh_package_install -t $codename-backports minidlna
-else	# Installation de la version minidlna des dépots courants.
+else
+	# Install the standard version from debian repository
 	ynh_apt update
 	ynh_package_install minidlna
 fi
@@ -75,25 +82,23 @@ ynh_app_setting_set $app version ${version:0:1}
 # INCREASE INOTIFY'S LIMITS
 #=================================================
 
-# Augmentation du nombre maximum de fichiers surveillés par inotify.
+# Increase the maximum number of files inotify can monitor.
 cp -a ../conf/90-inotify_minidlna.conf /etc/sysctl.d/
-# Et rechargement de la config du noyau.
+# Then, reload the kernel configuration.
 if ! IS_PACKAGE_CHECK; then
 	sysctl -p /etc/sysctl.d/90-inotify_minidlna.conf
 fi
 
 #=================================================
-# ENABLE SERVICE IN ADMIN PANEL
+# ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
 
-# Ajoute le service au monitoring de Yunohost.
 yunohost service add minidlna --log "/var/log/minidlna.log"
 
 #=================================================
 # CONFIGURE MINIDLNA
 #=================================================
 
-# Modifie la configuration de minidlna
 ynh_replace_string "^#*media_dir=.*" "media_dir=/home/yunohost.multimedia/share" /etc/minidlna.conf
 ynh_replace_string "^#*port=.*" "port=$port" /etc/minidlna.conf
 friendly_name="Yunohost DLNA"
@@ -103,25 +108,32 @@ root_container="B"
 ynh_replace_string "^#*root_container=.*" "root_container=$root_container" /etc/minidlna.conf
 ynh_app_setting_set $app root_container "$root_container"
 ynh_replace_string "^#wide_links=.*" "wide_links=yes" /etc/minidlna.conf
-ynh_store_file_checksum "/etc/minidlna.conf"	# Enregistre la somme de contrôle du fichier de config
+
+# Calculate and store the config file checksum into the app settings
+ynh_store_file_checksum "/etc/minidlna.conf"
 
 #=================================================
-# RESTART MINIDLNA'S SERVICE
+# RESTART MINIDLNA
 #=================================================
 
-# Redémarre minidlna pour prendre en compte la nouvelle configuration
-ynh_system_reload --service_name=minidlna --action=restart
+ynh_systemd_action --action=restart --service_name=minidlna
 
 #=================================================
 # SEND A README FOR THE ADMIN
 #=================================================
 
+# Get main domain and buid the url of the admin panel of the app.
+admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"
+
 message="You can find a config file at /etc/minidlna.conf
 
 MiniDLNA is going to serve the files present in the directory /home/yunohost.multimedia/share
 
 Please have a look to the documentation to learn more how to use MiniDLNA, https://yunohost.org/#/app_minidlna
 
-If you facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/minidlna_ynh"
+You can configure this app easily by using the experimental config-panel feature: $admin_panel/config-panel.
+You can also find some specific actions for this app by using the experimental action feature: $admin_panel/actions.
 
-ynh_send_readme_to_admin --app_message="$message" --recipients="root"
+If you're facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/minidlna_ynh"
+
+ynh_send_readme_to_admin --app_message="$message" --recipients="root" --type="install"
diff --git a/scripts/remove b/scripts/remove
index c0e4e42..826a7e8 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -20,21 +20,20 @@ port=$(ynh_app_setting_get $app port)
 #=================================================
 # STANDARD REMOVE
 #=================================================
-# DISABLE SERVICE IN ADMIN PANEL
+# REMOVE SERVICE FROM ADMIN PANEL
 #=================================================
 
-# Retire le service du monitoring de Yunohost.
-if yunohost service status | grep -q minidlna	# Test l'existence du service dans Yunohost
+# Check if the service is declared in YunoHost
+if yunohost service status | grep -q minidlna
 then
 	ynh_print_info "Remove minidlna service" >&2
 	yunohost service remove minidlna
 fi
 
 #=================================================
-# CLOSE THE PORTS
+# CLOSE PORTS
 #=================================================
 
-# Ferme les ports dans le firewall
 ynh_exec_fully_quiet yunohost firewall disallow TCP $port
 ynh_exec_fully_quiet yunohost firewall disallow UDP 1900
 
@@ -51,11 +50,10 @@ ynh_secure_remove "/etc/apt/sources.list.d/minidlna.list"
 # REMOVE INOTIFY'S CONFIG
 #=================================================
 
-# Suppression du paramètre inotify pour minidlna.
 if [ -e "/etc/sysctl.d/90-inotify_minidlna.conf" ]; then
 	ynh_print_info "Delete kernel config" >&2
 	ynh_secure_remove "/etc/sysctl.d/90-inotify_minidlna.conf"
-	# Et rechargement de la config du noyau.
+	# Reload the kernel configuration.
 	if ! IS_PACKAGE_CHECK; then
 		sysctl -p /etc/sysctl.d/90-inotify_minidlna.conf
 	fi
diff --git a/scripts/restore b/scripts/restore
index bd84e96..7a19677 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -32,7 +32,8 @@ port=$(ynh_app_setting_get $app port)
 #=================================================
 
 ynh_exec_fully_quiet yunohost firewall allow --no-upnp TCP $port
-ynh_exec_fully_quiet yunohost firewall allow --no-upnp UDP 1900 # Découverte SSDP pour UPNP.
+# Discovery Protocol SSDP for UPNP.
+ynh_exec_fully_quiet yunohost firewall allow --no-upnp UDP 1900
 
 #=================================================
 # CREATE YUNOHOST.MULTIMEDIA DIRECTORY
@@ -45,13 +46,15 @@ ynh_multimedia_build_main_dir
 #=================================================
 
 if [ ${version:0:1} = "B" ]
-then	# Installation de la version minidlna disponible dans backport. (En cas de problème avec la version actuelle des dépots)
-	codename=$(lsb_release -a 2>/dev/null | grep Codename | cut -f 2)
+then
+	# Install the backport version. (If you have issues with the standard version from the stable repository)
+	codename=$(ynh_debian_release)
 	ynh_restore_file "/etc/apt/sources.list.d/minidlna.list"
 	ynh_replace_string " [a-z]*-backports" " $codename-backports" /etc/apt/sources.list.d/minidlna.list
 	ynh_apt update
 	ynh_package_install -t $codename-backports minidlna
-else	# Installation de la version minidlna des dépots courants.
+else
+	# Install the standard version from debian repository
 	ynh_apt update
 	ynh_package_install minidlna
 fi
@@ -65,27 +68,37 @@ if ! IS_PACKAGE_CHECK; then
 	sysctl -p /etc/sysctl.d/90-inotify_minidlna.conf
 fi
 
-ynh_secure_remove "/etc/minidlna.conf"	# Supprime la config pour la remplacer par celle du backup
+#=================================================
+# RESTORE MINIDLNA CONFIGURATION
+#=================================================
+
+# Delete the current config of minidlna, in order to replace it by the version from the backup
+ynh_secure_remove "/etc/minidlna.conf"
 ynh_restore_file "/etc/minidlna.conf"
-ynh_system_reload --service_name=minidlna --action=restart
+ynh_systemd_action --action=restart --service_name=minidlna
 
 #=================================================
-# ENABLE SERVICE IN ADMIN PANEL
+# ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
 
-# Ajoute le service au monitoring de Yunohost.
 yunohost service add minidlna --log "/var/log/minidlna.log"
 
 #=================================================
 # SEND A README FOR THE ADMIN
 #=================================================
 
+# Get main domain and buid the url of the admin panel of the app.
+admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"
+
 message="You can find a config file at /etc/minidlna.conf
 
 MiniDLNA is going to serve the files present in the directory /home/yunohost.multimedia/share
 
 Please have a look to the documentation to learn more how to use MiniDLNA, https://yunohost.org/#/app_minidlna
 
-If you facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/minidlna_ynh"
+You can configure this app easily by using the experimental config-panel feature: $admin_panel/config-panel.
+You can also find some specific actions for this app by using the experimental action feature: $admin_panel/actions.
 
-ynh_send_readme_to_admin --app_message="$message" --recipients="root"
+If you're facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/minidlna_ynh"
+
+ynh_send_readme_to_admin --app_message="$message" --recipients="root" --type="restore"
diff --git a/scripts/upgrade b/scripts/upgrade
index 88814b1..a8f8c80 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -73,13 +73,15 @@ ynh_multimedia_build_main_dir
 #=================================================
 
 if [ $version = "B" ]
-then	# Installation de la version minidlna disponible dans backport. (En cas de problème avec la version actuelle des dépots)
-	codename=$(lsb_release -a 2>/dev/null | grep Codename | cut -f 2)
+then
+	# Install the backport version. (If you have issues with the standard version from the stable repository)
+	codename=$(ynh_debian_release)
 	ynh_replace_string "__CODENAME__" "$codename" ../conf/minidlna.list
 	cp -a ../conf/minidlna.list /etc/apt/sources.list.d/
 	ynh_apt update
 	ynh_package_install -t $codename-backports minidlna
-else	# Installation de la version minidlna des dépots courants.
+else
+	# Install the standard version from debian repository
 	ynh_apt update
 	ynh_package_install minidlna
 fi
@@ -88,18 +90,17 @@ fi
 # INCREASE INOTIFY'S LIMITS
 #=================================================
 
-# Augmentation du nombre maximum de fichiers surveillés par inotify.
+# Increase the maximum number of files inotify can monitor.
 cp -a ../conf/90-inotify_minidlna.conf /etc/sysctl.d/
-# Et rechargement de la config du noyau.
+# Then, reload the kernel configuration.
 if ! IS_PACKAGE_CHECK; then
 	sysctl -p /etc/sysctl.d/90-inotify_minidlna.conf
 fi
 
 #=================================================
-# ENABLE SERVICE IN ADMIN PANEL
+# ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
 
-# Ajoute le service au monitoring de Yunohost.
 yunohost service add minidlna --log "/var/log/minidlna.log"
 
 #=================================================
@@ -109,13 +110,16 @@ yunohost service add minidlna --log "/var/log/minidlna.log"
 # Overwrite the settings config file only if it's allowed
 if [ $overwrite_settings -eq 1 ]
 then
-	# Modifie la configuration de minidlna
-	ynh_backup_if_checksum_is_different "/etc/minidlna.conf"	# Créé un backup du fichier de config si il a été modifié.
+	# Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
+	ynh_backup_if_checksum_is_different "/etc/minidlna.conf"
+
 	ynh_replace_string "^#*media_dir=.*" "media_dir=/home/yunohost.multimedia/share" /etc/minidlna.conf
 	ynh_replace_string "^#*port=.*" "port=$port" /etc/minidlna.conf
 	ynh_replace_string "^#*friendly_name=.*" "friendly_name=$friendly_name" /etc/minidlna.conf
 	ynh_replace_string "^#*root_container=.*" "root_container=$root_container" /etc/minidlna.conf
 	ynh_replace_string "^#wide_links=.*" "wide_links=yes" /etc/minidlna.conf
+
+	# Calculate and store the config file checksum into the app settings
 	ynh_store_file_checksum "/etc/minidlna.conf"
 fi
 
@@ -123,5 +127,24 @@ fi
 # RESTART MINIDLNA'S SERVICE
 #=================================================
 
-# Redémarre minidlna pour prendre en compte la nouvelle configuration
-ynh_system_reload --service_name=minidlna --action=restart
+ynh_systemd_action --action=restart --service_name=minidlna
+
+#=================================================
+# SEND A README FOR THE ADMIN
+#=================================================
+
+# Get main domain and buid the url of the admin panel of the app.
+admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"
+
+message="You can find a config file at /etc/minidlna.conf
+
+MiniDLNA is going to serve the files present in the directory /home/yunohost.multimedia/share
+
+Please have a look to the documentation to learn more how to use MiniDLNA, https://yunohost.org/#/app_minidlna
+
+You can configure this app easily by using the experimental config-panel feature: $admin_panel/config-panel.
+You can also find some specific actions for this app by using the experimental action feature: $admin_panel/actions.
+
+If you're facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/minidlna_ynh"
+
+ynh_send_readme_to_admin --app_message="$message" --recipients="root" --type="upgrade"