diff --git a/action_map.yml b/action_map.yml
index 42568c7a..0325ee30 100644
--- a/action_map.yml
+++ b/action_map.yml
@@ -855,6 +855,26 @@ tools:
                     help: Subscribe domain to a DynDNS service
                     action: store_true
 
+        ### tools_update()
+        update:
+            action_help: YunoHost update
+            api: POST /update
+
+        ### tools_changelog()
+        changelog:
+            action_help: YunoHost changelog
+            api: POST /changelog
+
+        ### tools_upgrade()
+        upgrade:
+            action_help: YunoHost upgrade
+            api: POST /upgrade
+            
+        ### tools_upgradelog()
+        upgradelog:
+            action_help: Show dpkg log
+            api: POST /upgradelog
+
 
 #############################
 #           Hook            #
diff --git a/bash/checkupdate b/bash/checkupdate
new file mode 100644
index 00000000..30534bdf
--- /dev/null
+++ b/bash/checkupdate
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+if [ ! -d /tmp/yunohost ];
+then
+        mkdir /tmp/yunohost
+fi
+
+if [ -f /tmp/yunohost/changelog ];
+then
+	rm /tmp/yunohost/changelog
+fi
+
+apt-get update -y > /dev/null 2>&1
+if [[ $? != 0 ]];
+then
+	exit 2
+else
+	echo OK > /tmp/yunohost/update_status
+fi
+
+# Set $DIRCACHE
+eval `/usr/bin/apt-config shell DIRCACHE Dir::Cache`
+
+
+# get the list of packages which are pending an upgrade
+PKGNAMES=`/usr/bin/apt-get -q -y --ignore-hold --allow-unauthenticated -s dist-upgrade | \
+          /bin/grep ^Inst | /usr/bin/cut -d\  -f2 | /usr/bin/sort`
+
+if [[ $PKGNAMES = "" ]];
+then
+        exit 1
+fi
+
+if [ -n "$PKGNAMES" ] ; then
+
+        # do the upgrade downloads
+        /usr/bin/apt-get --ignore-hold -qq -d --allow-unauthenticated --force-yes dist-upgrade > /dev/null
+fi
+
+
+PKGPATH="/${DIRCACHE}archives/"
+for PKG in $PKGNAMES ; do
+        VER=`LC_ALL=C /usr/bin/apt-cache policy $PKG |\
+             /bin/grep Candidate: | /usr/bin/cut -f 4 -d \ `
+        OLDVER=`LC_ALL=C /usr/bin/apt-cache policy $PKG |\
+             /bin/grep Installed: | /usr/bin/cut -f 4 -d \ `
+        VERFILE=`echo "$VER" | /bin/sed -e "s/:/%3a/g"`
+        if ls ${PKGPATH}${PKG}_${VERFILE}_*.deb >& /dev/null ; then
+                DEBS="$DEBS ${PKGPATH}${PKG}_${VERFILE}_*.deb"
+        fi
+        echo -e "$PKG $OLDVER -> $VER"
+done
+
+MISSING_DEBS=`apt-get -y --ignore-hold --allow-unauthenticated --print-uris dist-upgrade \
+                          | grep "file:" \
+                          | sed "s/'file:\(.*\)' .*/\1/g"`
+
+DEBS=`echo $MISSING_DEBS $DEBS | /usr/bin/sort`
+
+if [[ $DEBS = "" ]];
+then
+	exit 3
+else
+	if [ -x /usr/bin/apt-listchanges ] ; then
+        	/usr/bin/apt-listchanges --which=both -f text $DEBS > /tmp/yunohost/changelog 2>/dev/null
+	fi
+fi
diff --git a/config/upgrade b/config/upgrade
new file mode 100644
index 00000000..0d0323b0
--- /dev/null
+++ b/config/upgrade
@@ -0,0 +1,5 @@
+/bin/bash
+rm /tmp/yunohost/update_status
+sudo apt-get upgrade -y -s > /tmp/yunohost/update_log 2>&1
+if [ $(echo $?) = 0 ]; then echo "OK" > /tmp/yunohost/upgrade_status; else echo "NOK" > /tmp/yunohost/upgrade_status; fi
+rm /tmp/yunohost/upgrade.run
diff --git a/yunohost_tools.py b/yunohost_tools.py
index 5fc68786..2f2fce6c 100644
--- a/yunohost_tools.py
+++ b/yunohost_tools.py
@@ -262,3 +262,65 @@ def tools_postinstall(domain, password, dyndns=False):
     win_msg(_("YunoHost has been successfully configured"))
 
 
+def tools_update():
+    """
+    Update distribution
+
+    """
+    process = Popen("/usr/bin/checkupdate", stdout=PIPE)
+    stdout, stderr = process.communicate()
+    if process.returncode == 1:
+        win_msg( _("Not upgrade found"))
+    elif process.returncode == 2:
+        raise YunoHostError(17, _("Error during update"))
+    else:
+        return { "Update" : stdout.splitlines() }
+        
+
+def tools_changelog():
+    """
+    Show Changelog
+
+    """
+    if os.path.isfile('/tmp/yunohost/update_status'):
+        with open('/tmp/yunohost/changelog', 'r') as f:
+            read_data = f.read()
+            return { "Changelog" : read_data.splitlines() }
+    else:
+        raise YunoHostError(17, _("Launch update before upgrade"))
+        
+
+def tools_upgrade():
+    """
+    Upgrade distribution
+
+    """
+    if os.path.isfile('/tmp/yunohost/upgrade.run'):
+        win_msg( _("Upgrade in progress"))
+    else:
+        if os.path.isfile('/tmp/yunohost/upgrade_status'):
+            with open('/tmp/yunohost/upgrade_status', 'r') as f:
+                read_data = f.read()
+                os.system('rm /tmp/yunohost/upgrade_status')
+                if read_data.strip() == "OK":
+                    win_msg( _("YunoHost has been successfully upgraded"))
+                else:
+                    raise YunoHostError(17, _("Error during upgrade"))
+        elif os.path.isfile('/tmp/yunohost/update_status'):
+            os.system('at now -f /usr/share/yunohost/upgrade')
+            win_msg( _("Upgrade in progress"))
+        else:
+            raise YunoHostError(17, _("Launch update before upgrade"))
+            
+
+def tools_upgradelog():
+    """
+    Show upgrade log
+
+    """
+    if os.path.isfile('/tmp/yunohost/upgrade.run'):
+        win_msg( _("Upgrade in progress"))
+    else:
+        with open('/tmp/yunohost/update_log', 'r') as f:
+            read_data = f.read()
+            return { "DPKG LOG" : read_data.splitlines() }