Linux – How to respawn a script in RHEL/Centos6 when /etc/inittab has been deprecated

Just remove the fork() from the code. To this point you've written a piece of code that you want to detatch from the console and run in the background. However, when processes run from inittab they need to stay attached. If you remove the fork(), it will stay attached to init and init will be able to monitor/start/stop/restart properly

I found a very, very, very helpful upstart script for people that are having problems in the future. Put this into /etc/init/

# /etc/init/debug.conf
start on ( starting JOB!=debug \
or started JOB!=debug \
or stopping JOB!=debug \
or stopped JOB!=debug )
script
exec 1>>/tmp/log.file
echo -n "$UPSTART_JOB/$UPSTART_INSTANCE ($0):$$:`date`:"
echo "Job $JOB/$INSTANCE $UPSTART_EVENTS. Environment was:"
env
echo
end script

This script basically logs all jobs that start or stop. I have found that CentOS 6 does not 'emit' anything about runlevels. (nor some of the other common events I had tried.'). Looking the log file that debug job creates in /tmp/log.file was very helpful. By changing the start of my script from:

start on runlevel [345]

to

start on started sshd

all my jobs appear to start up correctly. This was a pain in the rear, since every example I found used the former syntax..