Shell Keep Alive Script

Introduction

Simple shell script called from cron that checks and keeps motion running.

Detailed Description

In my setup I call this script every 5 minutes with a cron line like this:

0,5,10,15,20,25,30,35,40,45,50,55 * * * * /root/five-minutes.sh >/dev/null 2>&1

So name this script "five-minutes.sh" and don't forget to set it's permissions to 755 (do a chmod 755).

The reason I look for "./motion" is that I have two running versions of motion, the other one isn't all that important to me right now.

The "restart-motion" script is a simple script that changes to a special directory where I store my latest compiled version of motion and starts it from there, you can do what you want and/or just start motion directly from this script.

Here's the script:

#! /bin/sh

# check that motion is running every 5 minutes

# result is zero if we find it running

ps -F | grep "\./motion"
if [ $? -ne 0 ]
 then
 echo "Motion not running, re-starting it"
 /root/restart-motion
 else
 echo "Motion is running."
fi

exit 0

Comments and Bug Reports

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