diff --git a/scripts/_common.sh b/scripts/_common.sh
new file mode 100644
index 0000000..09ff695
--- /dev/null
+++ b/scripts/_common.sh
@@ -0,0 +1,65 @@
+# Curl abstraction to help with POST requests to local pages (such as installation forms)
+#
+# $domain and $path_url should be defined externally (and correspond to the domain.tld and the /path (of the app?))
+#
+# example: ynh_local_curl "/install.php?installButton" "foo=$var1" "bar=$var2"
+# 
+# usage: ynh_local_curl "page_uri" "key1=value1" "key2=value2" ...
+# | arg: page_uri    - Path (relative to $path_url) of the page where POST data will be sent
+# | arg: key1=value1 - (Optionnal) POST key and corresponding value
+# | arg: key2=value2 - (Optionnal) Another POST key and corresponding value
+# | arg: ...         - (Optionnal) More POST keys and values
+ynh_local_curl () {
+	# Define url of page to curl
+	path_url=$(ynh_normalize_url_path $path_url)
+	local local_page=$(ynh_normalize_url_path $1)
+	local full_path=$path_url$local_page
+	
+	if [ "${path_url}" == "/" ]; then 
+		full_path=$local_page
+	fi
+	
+	local full_page_url=https://localhost$full_path
+
+	# Concatenate all other arguments with '&' to prepare POST data
+	local POST_data=""
+	local arg=""
+	for arg in "${@:2}"
+	do
+		POST_data="${POST_data}${arg}&"
+	done
+	if [ -n "$POST_data" ]
+	then
+		# Add --data arg and remove the last character, which is an unecessary '&'
+		POST_data="--data ${POST_data::-1}"
+	fi
+	
+	# Wait untils nginx has fully reloaded (avoid curl fail with http2)
+	sleep 2
+
+	# Curl the URL
+	curl --silent --show-error -kL -H "Host: $domain" --resolve $domain:443:127.0.0.1 $POST_data "$full_page_url"
+}
+
+ynh_url_join() {
+    if [ "$#" -eq 0 ]; then
+        ynh_die "Illegal number of parameters"
+    fi
+    
+    local full_url=""
+
+    for var in "$@"
+    do
+        if [ "${var:0:1}" != "/" ]; then    # If the first character is not a /
+		    var="/$var"    # Add / at begin of path variable
+        fi
+
+        if [ "${var:${#var}-1}" == "/" ]; then    # If the last character is a /
+		    var="${var:0:${#var}-1}"	# Delete the last character
+        fi
+        full_url=${full_url}${var}
+    done
+
+    full_url=$(ynh_normalize_url_path $full_url)
+    echo $full_url
+}
\ No newline at end of file
diff --git a/scripts/backup b/scripts/backup
index 9efb470..78631da 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -6,8 +6,8 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
+source ../settings/scripts/_common.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE
diff --git a/scripts/install b/scripts/install
index 55360ac..98acbfd 100755
--- a/scripts/install
+++ b/scripts/install
@@ -6,8 +6,8 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-source _common.sh
 source /usr/share/yunohost/helpers
+source _common.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE
@@ -98,16 +98,34 @@ ynh_add_fpm_config
 php_config=$final_path/inc/config.php
 
 master_key=$(dd if=/dev/urandom bs=1 count=200 2>/dev/null | tr -c -d '[A-Za-z0-9]' | sed -n 's/\(.\{24\}\).*/\1/p')
-firstname=$(sudo yunohost user info $admin | grep firstname: | cut -d' ' -f2 | tr -d '\n')
-lastname=$(sudo yunohost user info $admin | grep lastname: | cut -d' ' -f2 | tr -d '\n')
-email=$(sudo yunohost user info $admin | grep mail: | cut -d' ' -f2 | tr -d '\n')
+firstname=$(yunohost user info $admin | grep firstname: | cut -d' ' -f2 | tr -d '\n')
+lastname=$(yunohost user info $admin | grep lastname: | cut -d' ' -f2 | tr -d '\n')
+email=$(yunohost user info $admin | grep mail: | cut -d' ' -f2 | tr -d '\n')
 timezone=$(cat /etc/timezone | tr -d '\n')
 
-sudo cp $php_config.in $php_config
+cp $php_config.in $php_config
+
+admin_url=$(ynh_url_join $path_url admin/index.php)
 
 # Config as if we called in admin/install/wizard.php
-sudo sed -i -e "s;'DC_DBDRIVER', '';'DC_DBDRIVER', 'mysqli';" -e "s;'DC_DBHOST', '';'DC_DBHOST', 'localhost';" -e "s;'DC_DBUSER', '';'DC_DBUSER', '$app';" -e "s;'DC_DBPASSWORD', '';'DC_DBPASSWORD', '$db_pwd';" -e "s;'DC_DBNAME', '';'DC_DBNAME', '$db_name';" -e "s;'DC_MASTER_KEY', '';'DC_MASTER_KEY', '$master_key';" -e "s;'DC_ADMIN_URL', '';'DC_ADMIN_URL', 'https://$domain$path_url/admin/index.php';" -e "s;'DC_ADMIN_MAILFROM', '';'DC_ADMIN_MAILFROM', '$email';" $php_config
-# Modify Nginx configuration file and copy it to Nginx conf directory
+ynh_replace_string "'DC_DBDRIVER', ''" "'DC_DBDRIVER', 'mysqli'" $php_config
+ynh_replace_string "'DC_DBHOST', ''" "'DC_DBHOST', 'localhost'" $php_config
+ynh_replace_string "'DC_DBUSER', ''" "'DC_DBUSER', '$app'" $php_config
+ynh_replace_string "'DC_DBPASSWORD', ''" "'DC_DBPASSWORD', '$db_pwd'" $php_config
+ynh_replace_string "'DC_DBNAME', ''" "'DC_DBNAME', '$db_name'" $php_config
+ynh_replace_string "'DC_MASTER_KEY', ''" "'DC_MASTER_KEY', '$master_key'" $php_config
+ynh_replace_string "'DC_ADMIN_URL', ''" "'DC_ADMIN_URL', 'https://$domain$admin_url'" $php_config
+ynh_replace_string "'DC_ADMIN_MAILFROM', ''" "'DC_ADMIN_MAILFROM', '$email'" $php_config
+
+# Config as if we called in admin/install/wizard.php
+ynh_replace_string "'DC_DBDRIVER', ''" "'DC_DBDRIVER', 'mysqli'" $php_config
+ynh_replace_string "'DC_DBHOST', ''" "'DC_DBHOST', 'localhost'" $php_config
+ynh_replace_string "'DC_DBUSER', ''" "'DC_DBUSER', '$app'" $php_config
+ynh_replace_string "'DC_DBPASSWORD', ''" "'DC_DBPASSWORD', '$db_pwd'" $php_config
+ynh_replace_string "'DC_DBNAME', ''" "'DC_DBNAME', '$db_name'" $php_config
+ynh_replace_string "'DC_MASTER_KEY', ''" "'DC_MASTER_KEY', '$master_key'" $php_config
+ynh_replace_string "'DC_ADMIN_URL', ''" "'DC_ADMIN_URL', 'https://$domain$admin_url'" $php_config
+ynh_replace_string "'DC_ADMIN_MAILFROM', ''" "'DC_ADMIN_MAILFROM', '$email'" $php_config
 
 #=================================================
 # SETUP APPLICATION WITH CURL
@@ -128,10 +146,6 @@ systemctl reload nginx
 # Installation with curl
 installUrl="/admin/install/index.php"
 
-if [ "$path_url" = "/" ]; then
-	installUrl="admin/install/index.php" # Fix if app is in the root domain
-fi
-
 ynh_local_curl $installUrl "u_email=$email" "u_firstname=$firstname" "u_name=$lastname" "u_login=$admin" "u_pwd=$password" "u_pwd2=$password"
 
 ynh_app_setting_delete $app skipped_uris
diff --git a/scripts/remove b/scripts/remove
index 69f1d24..2547fdf 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -6,8 +6,8 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-source _common.sh
 source /usr/share/yunohost/helpers
+source _common.sh
 
 #=================================================
 # LOAD SETTINGS
diff --git a/scripts/restore b/scripts/restore
index 052cbc1..39f6b81 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -6,8 +6,8 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
+source ../settings/scripts/_common.sh
 
 #=================================================
 # MANAGE SCRIPT FAILURE