diff --git a/proxmox/proxmox.template.debian.upgrade.sh b/proxmox/proxmox.template.debian.upgrade.sh
new file mode 100755
index 0000000..ef7ec7c
--- /dev/null
+++ b/proxmox/proxmox.template.debian.upgrade.sh
@@ -0,0 +1,351 @@
+#!/bin/sh
+#
+# This script will try to upgrade an LXC Debian template
+#   1. Start the LXC container if available
+#   2. Run some script to upgrade the container
+#   3. Stop the container
+
+# This script can be call by a cronjob (eg. daily, weekly,…)
+
+# Vars {{{
+readonly PROGNAME=$(basename "${0}")
+readonly PROGDIR=$(readlink -m $(dirname "${0}"))
+readonly ARGS="${*}"
+readonly NBARGS="${#}"
+[ -z "${DEBUG}" ] && DEBUG=1
+## Export DEBUG for sub-script
+export DEBUG
+
+readonly CT_ID_DEFAULT="199121"
+readonly SLEEP_DELAY_DEFAULT="5"
+
+## Colors
+readonly PURPLE='\033[1;35m'
+readonly RED='\033[0;31m'
+readonly RESET='\033[0m'
+readonly COLOR_DEBUG="${PURPLE}"
+# }}}
+usage() {                                                       # {{{
+
+	cat <<- EOF
+usage: $PROGNAME [-d|-h|-i|-s]
+
+Start and upgrade an LXC container for Debian template
+
+EXAMPLES :
+    - Upgrade default LXC container (${CT_ID_DEFAULT}) :
+        ${PROGNAME}
+
+    - Specify the container ID :
+        ${PROGNAME} --id 666
+
+OPTIONS :
+    -d,--debug
+        Enable debug messages.
+
+    -h,--help
+        Print this help message.
+
+    -i,--id
+        Choose a different LXC container ID (default ${CT_ID_DEFAULT}).
+
+    -s,--sleep
+        Set a different delay to test container between each
+        different state (default: ${SLEEP_DELAY_DEFAULT}).
+
+	EOF
+
+}
+# }}}
+debug_message() {                                               # {{{
+
+	local_message="${1}"
+
+	## Print message if DEBUG is enable (=0)
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_message}"
+
+	return 0
+}
+# }}}
+error_message() {                                               # {{{
+
+	local_error_message="${1}"
+	local_error_code="${2}"
+
+	## Print message if DEBUG is enable (=0)
+	[ "${DEBUG}" -eq "0" ] && printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}"
+
+	exit "${local_error_code:=66}"
+}
+# }}}
+define_vars() {                                                 # {{{
+
+	## If ct_id wasn't defined (argument) {{{
+	if [ -z "${ct_id}" ]; then
+		## Use default value
+		readonly ct_id="${CT_ID_DEFAULT}"
+	fi
+	## }}}
+
+	## If sleep_delay wasn't defined (argument) {{{
+	if [ -z "${sleep_delay}" ]; then
+		## Use default value
+		readonly sleep_delay="${SLEEP_DELAY_DEFAULT}"
+	fi
+	## }}}
+
+}
+# }}}
+is_proxmox_absent() {                                           # {{{
+
+	## By default, Proxmox is absent on an host
+	return_is_proxmox_absent="0"
+
+	## Check if the system runs on a PVE kernel
+	if ! uname --kernel-release -- | grep --quiet -- "pve";
+	then
+		return_is_proxmox_absent="0"
+		debug_message "is_proxmox_absent − \
+Proxmox is ${RED}absent${COLOR_DEBUG} on this host."
+	else
+		return_is_proxmox_absent="1"
+		debug_message "is_proxmox_absent − \
+Proxmox seems ${RED}present${COLOR_DEBUG} on this host."
+	fi
+
+	return "${return_is_proxmox_absent}"
+
+}
+# }}}
+is_lxc_container_absent() {                                     # {{{
+
+	local_ct_id="${1}"
+
+	## By default, the LXC container is absent from the current host
+	return_is_lxc_container_absent="0"
+
+	## Check if the system runs on a PVE kernel
+	if ! pct list -- | grep --quiet "${local_ct_id}";
+	then
+		return_is_lxc_container_absent="0"
+		debug_message "is_lxc_container_absent − \
+The LXC container (${RED}${local_ct_id}${COLOR_DEBUG}) is ${RED}absent${COLOR_DEBUG} from this host."
+	else
+		return_is_lxc_container_absent="1"
+		debug_message "is_lxc_container_absent − \
+The LXC container (${RED}${local_ct_id}${COLOR_DEBUG}) is ${RED}present${COLOR_DEBUG} on this host."
+	fi
+
+	return "${return_is_lxc_container_absent}"
+
+}
+# }}}
+is_lxc_container_state() {                                      # {{{
+
+	local_ct_id="${1}"
+	local_ct_state="${2}"
+
+	## Compare the status of the LXC container with argument
+	if pct status "${local_ct_id}" -- | grep --quiet --word-regexp "${local_ct_state}";
+	then
+		return_is_lxc_container_state="0"
+		debug_message "is_lxc_container_state − \
+The LXC container (${RED}${local_ct_id}${COLOR_DEBUG}) is in ${RED}${local_ct_state}${COLOR_DEBUG} state."
+	else
+		return_is_lxc_container_state="1"
+		debug_message "is_lxc_container_state − \
+The LXC container (${RED}${local_ct_id}${COLOR_DEBUG}) is not in ${RED}${local_ct_state}${COLOR_DEBUG} state."
+	fi
+
+	return "${return_is_lxc_container_state}"
+
+}
+# }}}
+start_lxc_container() {                                         # {{{
+
+	local_ct_id="${1}"
+
+	## By default, the container is not running
+	return_start_lxc_container="1"
+
+	## Start LXC container state
+	pct start "${local_ct_id}" || exit 1
+
+	## Wait a little for the container to start
+	sleep "${sleep_delay}"
+
+	## Verify LXC container status
+	if is_lxc_container_state "${local_ct_id}" "running";
+	then
+		return_start_lxc_container="0"
+		debug_message "start_lxc_container − \
+LXC container ${RED}${local_ct_id}${COLOR_DEBUG} is now ${RED}running${COLOR_DEBUG}."
+	else
+		return_start_lxc_container="1"
+		debug_message "start_lxc_container − \
+LXC container ${RED}${local_ct_id}${COLOR_DEBUG} is still ${RED}stopped${COLOR_DEBUG}."
+	fi
+
+	return "${return_start_lxc_container}"
+
+}
+# }}}
+stop_lxc_container() {                                          # {{{
+
+	local_ct_id="${1}"
+
+	## By default, the container is running
+	return_stop_lxc_container="1"
+
+	## Stop LXC container state
+	pct stop "${local_ct_id}" || exit 1
+
+	## Wait a little for the container to stop
+	sleep "${sleep_delay}"
+
+	## Verify LXC container status
+	if is_lxc_container_state "${local_ct_id}" "stopped";
+	then
+		return_stop_lxc_container="0"
+		debug_message "stop_lxc_container − \
+LXC container ${RED}${local_ct_id}${COLOR_DEBUG} is now ${RED}stopped${COLOR_DEBUG}."
+	else
+		return_stop_lxc_container="1"
+		debug_message "stop_lxc_container − \
+LXC container ${RED}${local_ct_id}${COLOR_DEBUG} is still ${RED}running${COLOR_DEBUG}."
+	fi
+
+	return "${return_stop_lxc_container}"
+
+}
+# }}}
+upgrade_container() {                                           # {{{
+
+	local_ct_id="${1}"
+
+	## Keep output if DEBUG mode is activated
+	if [ "${DEBUG}" -eq "0" ]; then
+		pct exec "${local_ct_id:-/dev/null}" -- bash -c "wget https://git.ipr.univ-rennes1.fr/cellinfo/scripts/raw/master/proxmox/proxmox.template.debian.sh --output-document=/tmp/proxmox.template.debian.sh" || exit 2
+		pct exec "${local_ct_id:-/dev/null}" -- bash -c "chmod +x /tmp/proxmox.template.debian.sh" || exit 2
+		pct exec "${local_ct_id:-/dev/null}" -- bash -c "/tmp/proxmox.template.debian.sh" || exit 2
+	else
+		pct exec "${local_ct_id:-/dev/null}" -- bash -c "wget --quiet https://git.ipr.univ-rennes1.fr/cellinfo/scripts/raw/master/proxmox/proxmox.template.debian.sh --output-document=/tmp/proxmox.template.debian.sh" || exit 2
+		pct exec "${local_ct_id:-/dev/null}" -- bash -c "chmod +x /tmp/proxmox.template.debian.sh" || exit 2
+		pct exec "${local_ct_id:-/dev/null}" -- bash -c "/tmp/proxmox.template.debian.sh" > /dev/null 2>&1 || exit 2
+	fi
+
+}
+# }}}
+
+main() {                                                        # {{{
+
+	## If Proxmox is not yet available on this host {{{
+	### Exit
+	is_proxmox_absent \
+		&& exit 0
+	## }}}
+
+	## Define all vars
+	define_vars
+
+	## If the LXC container ID is absent from this host {{{
+	### Exit
+	is_lxc_container_absent "${ct_id}" \
+		&& exit 0
+	## }}}
+
+	## If the LXC container ID is already running {{{
+	### Exit with error message
+	is_lxc_container_state "${ct_id}" "running" \
+		&& error_message "LXC container (${ct_id}) is already running. \
+Please power it off if you don't have any work in progress." "3"
+	## }}}
+
+	## If the LXC container ID is stopped {{{
+	### Try to start the container
+	is_lxc_container_state "${ct_id}" "stopped" \
+		&& start_lxc_container "${ct_id}"
+	## }}}
+
+	## Try to upgrade the container {{{
+	### And re-stop the container
+	### Then exit with success the script
+	upgrade_container "${ct_id}"        \
+		&& stop_lxc_container "${ct_id}"  \
+		&& exit 0
+	## }}}
+
+}
+# }}}
+
+# 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
+		-d|--debug )                          ## debug
+			DEBUG=0
+			;;
+		-h|--help )                           ## help
+			usage
+			## Exit after help informations
+			exit 0
+			;;
+		-i|--id )                             ## Use given CT ID
+			## Move to the next argument
+			shift
+			## Define ct_id
+			readonly ct_id="${1}"
+			;;
+		-s|--sleep )                          ## Use given sleeping delay
+			## Move to the next argument
+			shift
+			## Define sleep_delay
+			readonly sleep_delay="${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