I started a crontab job in a server remotely (in a screen session) from a local machine. Days later, I terminated the screen session and restarted my local machine. The cron job in the server is still running (I'm sure about this). But using crontab -l will show
"no crontab for xxx"
Nor does crontab -r deletes the job. So is it kind of zombie now? How do I manage it?
Look in the log that contains your cron messages (/var/log/{cron,syslog} or elsewhere) and see which user is running the jobs and ensure that it's the user you expect.
May 21 07:34:01 centos6 CROND[23644]: (iain) CMD (/path/to/somecommand)
Failing that it's possible you added them to /etc/crontab or one of the fragments in /etc/cron.d or even put a script in /etc/cron.{daily,hourly,monthly,weekly}.
If it's in a user crontab you can use
crontab -e -u user
to edit the relevant user's file or directly edit /etc/crontab.
If you can't find which user you could also go looking in /var/spool/cron/crontabs.
