How to get which version of cron daemon is running

Question

Background: I am working on CentOS

Details

# cat /proc/version
Linux version 2.6.18-308.4.1.el5PAE ([email protected]) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-52)) #1 SMP Tue Apr 17 17:47:38 EDT 2012

Question: How can i know which version cron daemon installed and running on machine

MeaCulpa · Accepted Answer · 2012-11-15T07:36:27.583

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The dummy way:

whereis -b crontab | cut -d' ' -f2 | xargs rpm -qf

edited Nov 15 '12 at 07:36

answered Nov 14 '12 at 08:50

MeaCulpa

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Nice Answer. Would you please explain the command? – Md Mahbubur Rahman Nov 15 '12 at 04:16
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search for a binary named crond, get the 2nd column of the output(the binary), then pass to rpm to look for it's belonging package. Note that in RHEL/CentOS cron daemon is named crond but not in some other OS. So I edited and use "crontab" instead which is more general. You can even filter from ps to figure out what binary is running – MeaCulpa Nov 15 '12 at 07:45
+1 for your helpful Answer. Also thanks for your helpful comment. – Md Mahbubur Rahman Jan 01 '13 at 05:31

score 3 · Answer 2 · answered Nov 14 '12 at 08:42

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On your centos system: rpm -q vixie-cron

Should be something like vixie-cron-4.1-77.el5_4.1

answered Nov 14 '12 at 08:42

Dennis Kaarsemaker

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Banjer · Answer 3 · 2012-12-31T14:50:51.237

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In EL6, you can check the version of cronie (contains crond) with yum:

sudo yum list installed cronie

fyi, cronie replaced vixie-cron in EL6.

edited Dec 31 '12 at 14:50

answered Dec 31 '12 at 14:44

Banjer

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How to get which version of cron daemon is running

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