diff --git a/github/check.etherpad.update.sh b/github/check.etherpad.update.sh
new file mode 100755
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+++ b/github/check.etherpad.update.sh
@@ -0,0 +1,255 @@
+#!/bin/sh
+#
+# Purpose {{{
+# This script will :
+#   1. Get Etherpad version from current installation (from directory)
+#   2. Get latest Etherpad version from Github.
+#   3. Compare installed and latest version.
+#   4. Create a temp file (to monitor) if versions mismatch.
+#
+## 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 Etherpad directory as argument, eg.
+#00 20 * * * root /opt/repos/ipr.scripts/github/check_cachet_update --directory /srv/www/etherpad-lite
+### 3. Monitor the temp file : /tmp/.github.etherpad.upgrade
+### 3.b Or enable MAILTO in cronjob and edit the script to print a message.
+## }}}
+#
+# 2022-08-25
+# }}}
+# Vars {{{
+PROGNAME=$(basename "${0}"); readonly PROGNAME
+PROGDIR=$(readlink -m $(dirname "${0}")); readonly PROGDIR
+ARGS="${*}"; readonly ARGS
+readonly NBARGS="${#}"
+[ -z "${DEBUG}" ] && DEBUG=1
+## Export DEBUG for sub-script
+export DEBUG
+
+## Default values for some vars
+readonly ETHERPAD_INSTALL_DIR_DEFAULT="/srv/www/etherpad-lite"
+readonly ETHERPAD_REPO_URL="https://github.com/ether/etherpad-lite"
+readonly ETHERPAD_NEW_VERSION_FILE="/tmp/.github.etherpad.upgrade"
+
+## Colors
+readonly PURPLE='\033[1;35m'
+readonly RED='\033[0;31m'
+readonly RESET='\033[0m'
+readonly COLOR_DEBUG="${PURPLE}"
+# }}}
+usage() {                                                       # {{{
+
+	cat <<- HELP
+usage: $PROGNAME [-d|-h]
+
+Compare Etherpad installed version and latest one.
+
+EXAMPLES :
+    - Check Etherpad version from default directory (${ETHERPAD_INSTALL_DIR_DEFAULT})
+        ${PROGNAME}
+
+    - Check Etherpad version from a specific location
+        ${PROGNAME} --directory /var/www/my_etherpad
+
+OPTIONS :
+    --debug
+        Enable debug messages.
+
+    -d,--dir,--directory
+        Etherppad installation directory.
+        (default: ${ETHERPAD_INSTALL_DIR_DEFAULT}).
+
+    -h,--help
+        Print this help message.
+HELP
+
+}
+# }}}
+debug_message() {                                               # {{{
+
+	local_debug_message="${1}"
+
+	## Print message if DEBUG is enable (=0)
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_debug_message}"
+
+	unset local_debug_message
+
+	return 0
+}
+# }}}
+error_message() {                                               # {{{
+
+	local_error_message="${1}"
+	local_error_code="${2}"
+
+	## Print message
+	printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}"
+
+	exit "${local_error_code:=66}"
+}
+# }}}
+define_vars() {                                                 # {{{
+
+	## If etherpad_install_dir wasn't defined (argument) {{{
+	if [ -z "${etherpad_install_dir}" ]; then
+		## Use default value
+		readonly etherpad_install_dir="${ETHERPAD_INSTALL_DIR_DEFAULT}"
+	fi
+	## }}}
+
+}
+# }}}
+is_var_empty() {                                                # {{{
+
+	## Return False by default
+	return_var_empty="1"
+	## Total number of variables to test
+	local_total_var="${#}"
+
+	loop_count_var_empty="0"
+
+	## While it remains a variable to test
+	while [ "${local_total_var}" -gt "${loop_count_var_empty}" ]; do
+		debug_message "is_var_empty − \
+Test var: ${1}."
+		### Test if this is empty and set return value to True
+		[ -z "${1}" ] && return_var_empty="0"
+
+		### Increase the number of tested variables
+		loop_count_var_empty=$((loop_count_var_empty+1))
+
+		### Shift to the next variable
+		shift
+	done
+
+	return "${return_var_empty}"
+
+}
+# }}}
+
+main() {                                                        # {{{
+
+	## Define all vars
+	define_vars
+
+	## If Etherpad install dir doesn't exists {{{
+	### AND Exit with error message
+	! test -d ${etherpad_install_dir} \
+		&& error_message "Etherpad installation directory (${etherpad_install_dir}) doesn't seem to exist." 01
+	## }}}
+
+	## Get current version from src/package.json file {{{
+	### OR Exit with error message
+	etherpad_current_version=$(sed --silent 's/.*"version": "\(.*\)".*/\1/p' "${etherpad_install_dir}"/src/package.json \
+		|| error_message "Can't get current Etherpad version from file (${etherpad_install_dir}/src/package.json)." 02 )
+		debug_message "main − Etherpad installed version : ${RED}${etherpad_current_version}${COLOR_DEBUG} (from ${etherpad_install_dir}/src/package.json file)."
+	## }}}
+	## Get latest version from project repository {{{
+	### OR Exit with error message
+	etherpad_latest_version=$("${PROGDIR}/releasetags" "${ETHERPAD_REPO_URL}" | head --lines=1 \
+		|| error_message "Can't get latest Etherpad version from repository (${ETHERPAD_REPO_URL})." 02 )
+		debug_message "main − Etherpad installed version : ${RED}${etherpad_latest_version}${COLOR_DEBUG} (from ${ETHERPAD_REPO_URL} project repository)."
+	## }}}
+
+	## If any of the two variables is empty {{{
+	### OR Exit with error message
+	### Double check :)
+	is_var_empty "${etherpad_current_version}" "${etherpad_latest_version}" \
+		&& error_message "At least one variable is empty (current version : ${etherpad_current_version}, latest version : ${etherpad_latest_version}) !" 04
+	## }}}
+
+	# Check if the current version is the last one {{{
+	## If the two versions are the same {{{
+	if [ "${etherpad_current_version}" = "${etherpad_latest_version}" ]; then
+		debug_message "Test version − \
+The current Etherpad version (${etherpad_current_version}) is up-to-date."
+
+		### Ensure to remove any temp file
+		rm --force -- "${ETHERPAD_NEW_VERSION_FILE}"
+
+		exit 0
+	## }}}
+	## If the versions are different {{{
+	else
+		debug_message "Test version − \
+Current version (${etherpad_current_version}) and latest one (${etherpad_latest_version}) seems to be different."
+
+		## Create a temp file to monitor
+		touch -- "${ETHERPAD_NEW_VERSION_FILE}"
+		debug_message "An upgrade is available for Cachet (current : ${etherpad_current_version}) : ${etherpad_latest_version}." >> "${ETHERPAD_NEW_VERSION_FILE}"
+
+		exit 0
+	fi
+	## }}}
+	# }}}
+
+}
+# }}}
+
+# Manage arguments                                                # {{{
+# This code can't be in a function due to argument management
+
+if [ ! "${NBARGS}" -eq "0" ]; then
+
+	manage_arg="0"
+
+	## If the first argument is not an option
+	if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
+	then
+		## Print help message and exit
+		printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
+		printf '%b\n' "---"
+		usage
+
+		exit 1
+	fi
+
+	# Parse all options (start with a "-") one by one
+	while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
+
+	case "${1}" in
+		--debug )                             ## debug
+			DEBUG=0
+			;;
+		-h|--help )                           ## help
+			usage
+			## Exit after help informations
+			exit 0
+			;;
+		-d|--dir|--directory )                ## Define etherpad_install_dir with given arg
+			### Move to the next argument
+			shift
+			### Define var
+			readonly etherpad_install_dir="${1}"
+			;;
+		* )                                   ## unknow option
+			printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
+			printf '%b\n' "---"
+			usage
+			exit 1
+			;;
+	esac
+
+	debug_message "Arguments management − \
+${RED}${1}${COLOR_DEBUG} option managed."
+
+	## Move to the next argument
+	shift
+	manage_arg=$((manage_arg+1))
+
+	done
+
+	debug_message "Arguments management − \
+${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
+else
+	debug_message "Arguments management − \
+No arguments/options to manage."
+fi
+
+# }}}
+
+main
+
+exit 255