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I'd like to know if there's a way to find out when the next time a cron job will run - via a bash job. Has anyone tried something like this?

I've been googling but I haven't found anything yet.

Thanks.

EDIT 1

Just some more details of what I'm after. When I check crontab -l, see the following output: 

lab-1:/etc/crontabs# crontab -l # do daily/weekly/monthly maintenance # min hour day month weekday command */15 * * * * run-parts /etc/periodic/15min 0 * * * * run-parts /etc/periodic/hourly 0 2 * * * run-parts /etc/periodic/daily 0 3 * * 6 run-parts /etc/periodic/weekly 0 5 1 * * run-parts /etc/periodic/monthly #Ansible: Run every minute * * * * * run-parts /etc/periodic/1min

What I need to know is not just that the 15 minute folder is "enabled" but if there's a way, I'd like to know that for example, 3 minutes from now, the job in the 15 minute folder will be triggered.

Is there any way to do this?

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I don't know if it fit exactly your needs, but you can translate crontab files in english, check crontab2english

 Usage: % crontab2english [-f] files... Or: % cat files... | crontab2english If you do just this: % crontab2english then it's the same as crontab -l | crontab2english Example output: % crontab2english | less Setting env var MAILTO to [email protected] Command: (line 2) Run: /bin/csh -c 'perl ~/thang.pl | mail -s hujambo root' At: 8:10am on the 15th of every month Command: (line 5) Run: df -k At: 5:40am every day Command: (line 7) Run: ls -l /tmp At: 6:50am every Monday Or with the -f ("f" for filter) switch, it just adds comments to the input file: % crontab2english -f | less # My happy crontab file [email protected] 10 8 15 * * /bin/csh -c 'perl ~/thang.pl | mail -s hujambo root' #> At: 8:10am on the 15th of every month 40 5 * * * df -k #> At: 5:40am every day 50 6 * * 1 ls -l /tmp #> At: 6:50am every Monday
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  • hm. i need something either in bash or python. Commented Feb 15, 2018 at 20:29

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