Watchdog Script

I was looking  for a script to monitor a process and restart it if it failed on Linux, so here is a watch dog script that I found on SO, here: http://stackoverflow.com/a/16787862/4028210

The script will watch a process and restart it if it is not running.

The script

#!/bin/sh

PROCESS="$1"
PROCANDARGS="<YOUR PROCESS AND ARGS>"

while :
do
    RESULT=`pgrep ${PROCESS}`
    if [ "${RESULT:-null}" = null ]; then
        echo "${PROCESS} not running, starting "$PROCANDARGS
        $PROCANDARGS &
    else
         echo "running"
    fi
    sleep 10
done

 

Usage

Let’s say the script is named “wdt.sh”

make sure it is executable:

chmod +x ./wdt.sh

As an example we’ll keep gedit running, run it as below:

./wdt/sh gedit