diff --git a/github/check.nextcloud.update b/github/check.nextcloud.update
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+#!/bin/sh
+# Purpose {{{
+## Create a temp file (to monitor) if an upgrade is available for Nextcloud
+## project on Github.
+## It based on the nextcloud's root directory to get the current version and
+## supposed to be install from source (github) or at least get a VERSION file.
+## How-to use {{{
+### 1. Needs releasetags script, in the same directory
+### cf. https://git.ipr.univ-rennes1.fr/cellinfo/scripts/src/master/github/releasetags
+# wget https://git.ipr.univ-rennes1.fr/cellinfo/scripts/raw/master/github/releasetags
+### 2. Create a cron job with Nextcloud directory as first argument, eg.
+#00 20 * * * root /opt/repos/ipr.scripts/github/check.nextcloud.update /var/www/nextcloud
+### 3. Monitor the temp file : /tmp/.github.nextcloud.upgrade
+# Or enable MAILTO in cronjob and edit the script to print a message.
+# Or send a mail.
+# …
+## }}}
+# }}}
+
+# Expect 1 argument {{{
+if [ $# -ne 1 ]
+then
+	cat << HELP
+
+check.nextcloud.update  --
+Compare current version of an installed Nextcloud and the last available.
+
+EXAMPLE :
+    - Compare the current version installed in /var/www/nextcloud.domain.tld
+        check.nextcloud.update /var/www/nextcloud.domain.tld
+
+HELP
+
+	exit 1
+fi
+
+# }}}
+
+# Vars {{{
+DEBUG=1
+
+script_wd=$(dirname "${0}")
+
+nc_install_dir="${1}"
+nc_current_version=$(grep -- OC_VersionString "${nc_install_dir}"/version.php | sed "s/^\$OC.* = '\(.*\)';$/\1/" || exit 1)
+nc_current_major=$(grep -- OC_VersionString "${nc_install_dir}"/version.php | sed "s/^\$OC.* = '\(.*\)';$/\1/" | cut -d"." -f1 || exit 2)
+
+nc_repo_url="https://github.com/nextcloud/server"
+nc_new_version_list="/tmp/.github.nextcloud.taglist"
+#nc_new_version=$("${script_wd}"/releasetags "${nc_repo_url}" | grep -v -E -- "(^v|alpha|beta|RC)" | head -n3)
+
+nc_new_version_file="/tmp/.github.nextcloud.upgrade"
+# }}}
+
+# Get the 3 last tags releses for Nextcloud
+## Exclude tag starting with "v", and those contains alpha, beta or RC
+rm -f -- "${nc_new_version_list}" ; touch -- "${nc_new_version_list}"
+"${script_wd}"/releasetags "${nc_repo_url}" | grep -v -E -- "(^v|alpha|beta|RC)" | head -n3 >> "${nc_new_version_list}"
+
+# For all tags contained in the tag list
+while IFS= read -r nc_new_version; do
+
+	# Check if the current version is the last one {{{
+	if [ "${nc_current_version}" != "${nc_new_version}" ]; then
+		[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — Current version (${nc_current_version}) and latest available (${nc_new_version}) seems to be different."
+
+		nc_new_major=$(echo "${nc_new_version}" | cut -d"." -f1)
+
+		## If it's a minor release for stable or a new stable version {{{
+		if [ "${nc_current_major}" -le "${nc_new_major}" ]; then
+			[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test release major — A minor or major upgrade needs to be apply."
+		### Create a temp file to monitor
+			touch -- "${nc_new_version_file}"
+			printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for Nextcloud (current : ${nc_current_version}) : ${nc_new_version}." >> "${nc_new_version_file}"
+			printf '\e[1;35m%-6s\e[m\n' "Please also take a look to the CHANGELOG : https://nextcloud.com/changelog/#latest${nc_new_major}" >> "${nc_new_version_file}"
+
+			### Exit to ensure to keep the file in place
+			exit 0
+		## }}}
+		## It's an upgrade for a previous major release {{{
+		else
+			[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test release major — It looks like an upgrade for a previous major release."
+
+		fi
+		## }}}
+	# }}}
+	# Same version {{{
+	else
+		[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — The current version is up-to-date."
+		rm -f -- "${nc_new_version_file}"
+	fi
+	# }}}
+
+done < "${nc_new_version_list}"
+rm -f -- "${nc_new_version_list}"
+
+exit 0