I am looking for some script or terminal command to list all the scripts (preferably with their paths) which are run on a periodic basis by cron, cron.daily. I am not looking for any filter for time-period of the script and want all the scripts listed ( however some administrators may want this kind of filter).

Purpose: To document all scripts running periodically so that debugging or fault check , updating and transferring to a newer system is easy and efficient.

  • Simplistically you're asking what jobs are in cron; narrowed down to just scripts, not binaries? What about scripts that are subsequently called by those top-level scripts? That would be a bit more involved... – Jeff Schaller May 25 '16 at 10:30
  • I am only only concerned about the user scripts set as cron jobs. – ankit7540 May 25 '16 at 10:32
  • Non-root users only? – Jeff Schaller May 25 '16 at 10:34
  • Yeah, non root users only. – ankit7540 May 25 '16 at 10:40

To find the filenames and script types of all scripts run from cron by non-root users (does not identify user):

find /var/spool/cron/crontabs/ -type f ! -name 'root' \
  -exec awk '!/^[[:blank:]]*(#|$)/ {print $6}' {} + | 
    xargs -d'\n' file | grep -i script
/home/cas/scripts/fetch.sh:               Bourne-Again shell script, ASCII text executable
/usr/local/sbin/backup-postgres.sh:       Bourne-Again shell script, ASCII text executable

To find all executables (binaries & scripts) run from cron by non-root users (identifies user):

find /var/spool/cron/crontabs/ -type f ! -name 'root' \
  -execdir awk '!/^[[:blank:]]*(#|$)/ {print FILENAME"\t"$6}' {} + |
  sed -e 's:^./::'
cas   /home/cas/scripts/fetch.sh
postgres      /usr/local/sbin/backup-postgres.sh

Of course, both of these have to be run as root. Only root can read the crontabs of all users.

Note: The crontabs may be in a different directory on your system. Check the documentation for your cron daemon.

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