run a shellscript in background after startup

Shell Programming and Scripting
1

hi.

i need to start a shellscript AFTER full system startup

the script will then run permanently in a loop checking the server every minute and in case of major hangs it just reboots the machine.

i put it into /etc/rc.local file like this:

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

/checkerscript1 &
/checkerscript2 &

exit 0

now this works, but when i check running processes with "top" i see multiple instances of the script running,
which is definitely not what i want.

how can i start a script correctly after full system startup???

thanks for any answers!

2

Can you post the scripts? What you show so far will not cause multiple running copies. Maybe the script calls itself?

3

yeah, the script calls itself.
then thats the problem.

now i call the script itself with a & at the end and it works fine now.

thanks sir, great help

4

Sorry, without knowing what the script is going to do it would be pure guesswork how best to start the script. It is also usual to build in a means of stopping a background process.

5

well the script does this:

it fetches a small textfile from the local running webserver via curl
if the webserver doesnt respond within 15 seconds the script restarts the webserver.

sleep 120
xxx=`curl -m 15 http://localhost/online.txt`
if [ $xxx == online ]
then
echo running
else
apache2ctl restart
fi
/webservercheck &

works fine now.