diff --git a/misc/life_mngr/s5_trigger.sh b/misc/life_mngr/s5_trigger.sh
new file mode 100755
index 000000000..a004d1330
--- /dev/null
+++ b/misc/life_mngr/s5_trigger.sh
@@ -0,0 +1,216 @@
+#! /bin/bash
+# Copyright (C) 2020 Intel Corporation.
+# SPDX-License-Identifier: BSD-3-Clause
+
+MAX_ARRAY=6
+
+started="started"
+stopped="stopped"
+SOS="sos"
+UOS="uos"
+SHUTDOWN="shutdown"
+ACKED="acked"
+
+#config
+IP_ADDR="127.0.0.1"
+SOCKET_PORT="8193"
+
+#send message by socket
+send_message()
+{
+	message="$1"
+	echo "Sending: $message"
+	echo -ne "$message" >&6 &
+}
+
+#read message by socket
+read_message()
+{
+	read -r -d $'\0' ret_msg <&6
+}
+
+#send message by tty
+send_pre_message()
+{
+	message="$1"
+	echo "Sending: $message"
+	echo -ne "$message" > /dev/ttyS1
+}
+
+#read message by tty
+read_pre_message()
+{
+	read -r -d $'\0' ret_msg < /dev/ttyS1
+}
+
+power_off_post_vms() {
+	vm_list=$(acrnctl list)
+	echo $vm_list
+
+	array=($vm_list)
+	num=${#array[@]}
+	echo "Number of VMs: " $num
+
+	if [ $num -gt $MAX_ARRAY ]; then
+		echo "There are no VMs running or acrnctl encountered an internal error."
+		return 0
+	fi
+
+	#shut down post-launched VMs
+	for ((i=0; i<$num; i+=2))
+	do
+		if [ ${array[$i+1]} == $started ]; then
+			echo "Shutting down: " ${array[$i]}
+			acrnctl stop ${array[$i]}
+			sleep 5s
+		fi
+	done
+
+	return 1
+}
+
+check_post_vms_status() {
+	#check post-launched VM status for some time
+	check_times=5
+	while [[ $check_times > 0 ]]
+	do
+		vm_list=$(acrnctl list)
+		array=($vm_list)
+		num=${#array[@]}
+		echo "VM status: " $vm_list
+
+		if [ $num -gt $MAX_ARRAY ]; then
+			sleep 5s
+			let check_times--
+			echo "Check #" $check_times
+			continue;
+		fi
+
+		flag=0
+
+		for ((i=0; i<$num; i+=2))
+		do
+			if [ ${array[$i+1]} != $stopped ]; then
+				flag=1
+				break;
+			fi
+		done
+
+		if [ $flag -eq 1 ]; then
+			sleep 5s
+			let check_times--
+			echo "Check #" $check_times
+		else
+			echo "VM status: " $vm_list
+			break;
+		fi
+
+		if [ $check_times -eq 0 ]; then
+			echo "Timed out waiting for VMs..."
+			break;
+		fi
+	done
+
+	if [ $check_times -gt 0 ]; then
+		return 1;
+	else
+		return 0;
+	fi
+}
+
+check_post_vms_alive() {
+	#check if there is any post-launched VM alive, and return if there is
+	vm_list=$(acrnctl list)
+	array=($vm_list)
+	num=${#array[@]}
+
+	for ((i=0; i<$num; i+=2))
+	do
+		if [ ${array[$i+1]} == $started ]; then
+			echo $vm_list " VM alive!"
+			return 1
+		fi
+	done
+
+	echo "No VM alive: " $vm_list
+	return 0
+}
+
+if [ "$1" = "$SOS" ]; then
+	try_times=2
+
+	#shut down post-launched VMs
+	while [[ $try_times -gt 0 ]]
+	do
+		echo "Checking whether post-launched VMs are alive..."
+		check_post_vms_alive
+		if [ $? -eq 0 ]; then
+			try_times=1
+			break
+		fi
+
+		echo "Powering off VMs..."
+		power_off_post_vms
+		if [ $? -eq 0 ]; then
+			break
+		fi
+
+		echo "Checking the status of post-launched VMs..."
+		check_post_vms_status
+		if [ $? -eq 1 ]; then
+			break
+		fi
+
+		let try_times--
+	done
+
+	if [ $try_times -eq 0 ]; then
+		echo "S5 failed!"
+		exit
+	fi
+
+	echo $(acrnctl list)
+
+	#send shutdown message to the pre-launched VM
+	send_pre_message $SHUTDOWN
+	#read ack message from the pre-launched VM
+	read_pre_message
+	echo "ret_msg: $ret_msg"
+
+	#check the ack message
+	if [ "$ret_msg" = "$ACKED" ]; then
+		echo "Received ACK message"
+	else
+		echo "Could not receive ACK message from the pre-launched User VM"
+		exit
+	fi
+
+	#all pre-launched and post-launched VMs have shut down
+	echo "Shutting down the Service VM itself..."
+	sleep 3s
+	poweroff
+
+elif [ "$1" = "$UOS" ]; then
+	echo "Trying to open socket..."
+	if ! exec 6<>/dev/tcp/$IP_ADDR/$SOCKET_PORT
+	then
+		echo "Failed to open socket"
+		exit 1
+	fi
+	echo "Socket opened"
+
+	#send shutdown message
+	send_message $SHUTDOWN
+	#read ack message
+	read_message
+	echo "ret_msg: $ret_msg"
+
+	#check the ack message
+	if [ "$ret_msg" = "$ACKED" ]; then
+		echo "Received ACK message"
+	else
+		echo "Could not receive ACK message"
+	fi
+else
+	echo "Error! Please use: ./s5_trigger.sh sos  OR ./s5_trigger.sh uos"
+fi