"But what about setting up a particular job for yourself? You
keep your job definitions in /etc/init/jobs.d, and they should be
plain text files, and not executable. Your job needs to have either
an exec line:
exec /bin/echo "ping"
"giving a path to a binary, and the arguments to pass to it; or
a script section, as in the runlevel 3 job description above, which
has a shell script to be run with /bin/sh. These define what will
be run when the job is triggered. Jobs can be set to respawn with
the line:
respawn
"There's an automatic limit set to this: if a process is
respawned more than 10 times within 5 seconds, it will be stopped
and not restarted. You can alter this default with: