diff --git a/cluster/apt.check.update.sh b/cluster/apt.check.update.sh
index e42987f..7e04ed7 100755
--- a/cluster/apt.check.update.sh
+++ b/cluster/apt.check.update.sh
@@ -2,7 +2,8 @@
 
 # This script will check if any APT upgrade is available and
 # will prepare the host in order to apply upgrade with another script
-#   1. Disable SGE queue
+#   1. Create a temp file
+#   2. Disable SGE queue
 
 # This script can be call by a cronjob (eg. weekly)
 # Another script should try to apply upgrades also with cron (eg. hourly)
@@ -16,6 +17,8 @@ readonly NBARGS="${#}"
 ## Export DEBUG for sub-script
 export DEBUG
 
+readonly APT_TMP_FILE="/tmp/.apt.upgrade"
+
 ## Colors
 readonly PURPLE='\033[1;35m'
 readonly RED='\033[0;31m'
@@ -118,13 +121,17 @@ main() {                                                        # {{{
 	disable_host_queue_script="${PROGDIR}/disable.host.queue.sh"
 
 	## If NO APT package upgrade is available
+	### Ensure to remove any temp file related to APT upgrades
 	### Exit
 	is_apt_upgrade_absent \
+		&& rm -f -- "${APT_TMP_FILE}" \
 		&& exit 0
 
 	## If APT package upgrade is available
+	### Create a temp file
 	### Disable SGE queue
 	is_apt_upgrade_present \
+		&& touch "${APT_TMP_FILE}" && echo "APT upgrade is available." >> "${APT_TMP_FILE}" \
 		&& sh "${disable_host_queue_script}" \
 		&& exit 0