Accidentally deleted all cron jobs - is there a way to bring them all back?

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#1 Sat, 02/27/2016 - 19:02
Brook

Accidentally deleted all cron jobs - is there a way to bring them all back?

Using a program that was meant to append a cron, but seems to have deleted everything.

Here's what I've got at the moment (see link below), are any Virtualmin/webmin ones missing?

http://i66.tinypic.com/j8pt9k.png

Is there an easy way to get my old cron jobs back?

Sat, 02/27/2016 - 19:58
Brook

Ok, I've found all the cron jobs that run yesterday in /var/log/cron and have added all of my own cron jobs back in.

I've also added this one:

/etc/webmin/status/monitor.pl

But am unsure of these entries:

Feb 27 00:01:01 rock CROND[3042]: (root) CMD (run-parts /etc/cron.hourly)
Feb 27 03:25:01 rock run-parts(/etc/cron.daily)[25731]: starting logrotate
Feb 27 03:25:04 rock run-parts(/etc/cron.daily)[27038]: finished man-db.cron
Feb 27 03:25:04 rock run-parts(/etc/cron.daily)[25731]: starting locate

Do I need to add them too? (How?)

Mon, 02/29/2016 - 13:18
Brook

Does anyone know what the default webmin/virtualmin cron jobs are please?

Tue, 03/01/2016 - 10:26
andreychek

Howdy,

Just to clarify, are you saying you lost all of root's cronjobs? Or the cron jobs for a particular user?

-Eric

Tue, 03/01/2016 - 12:16
Brook

Hi Eric

I ran the command as root so I am guessing it deleted all of them - the only ones remaining were the ones in this image:

http://i66.tinypic.com/j8pt9k.png

I have since deactivated the trio as I don't use awstats and the spamassasin and clamav ones, but have manually added the follow two:

/etc/webmin/status/monitor.pl (3 times an hour)
/etc/cron.hourly/0anacron (hourly - should that 0 be in there?)

And left these there:

/usr/sbin/csf -u (once a day)
/usr/sbin/raid-check (once a day)
/etc/init.d/lfd restart > /dev/null 2>&1 (once a day)

Am I missing any others?

Tue, 03/01/2016 - 20:09
andreychek

Howdy,

Hmm, did it just remove the cron jobs in root's crontab, which can be seen by running "crontab -l"? Or did it also remove everything in "/etc/cron.hourly", "/etc/cron.daily", "/etc/cron.weekly", and "/etc/cron.monthly"?

I think you got the main Virtualmin cron jobs, but my concern is that other system tasks may have been removed.

-Eric

Wed, 03/02/2016 - 08:18
Brook

Thanks Eric, here is the output and contents of that command/directories:

# crontab -l
# Begin Whenever generated tasks for: /home/mysite.com/app/releases/3535/config/schedule.rb
# 0,5,10,15,20,25,30,35,40,45,50,55 * * * * /bin/bash -l -c (cron job details here)
# End Whenever generated tasks for: /home/mysite.com/app/releases/3535/config/schedule.rb

@hourly /opt/rubies/ruby-2.2.2/bin/ruby (my-cron-2)
30 15 * * * /opt/rubies/ruby-2.2.2/bin/ruby (my-cron-3)
55 3 * * * /opt/rubies/ruby-2.2.2/bin/ruby (my-cron-4)
4 10 * * * /opt/rubies/ruby-2.2.2/bin/ruby (my-cron-5)
30 10 * * * /opt/rubies/ruby-2.2.2/bin/ruby (my-cron-6)
1,17,31,47 * * * * /etc/webmin/status/monitor.pl
@hourly /etc/cron.hourly/0anacron



# cd /etc/cron.hourly
# ll
total 28
drwxr-xr-x.   2 root root  4096 Feb 26 01:57 ./
drwxr-xr-x. 104 root root 12288 Feb 29 22:34 ../
-rwxr-xr-x    1 root root   392 Jul 27  2015 0anacron*
-rwxr-xr-x    1 root root   362 Dec  3 15:33 0yum-hourly.cron*
-rwxr-x---    1 root root   174 Jul 27  2015 awstats*



# cd /etc/cron.daily
# ll
total 36
drwxr-xr-x.   2 root root  4096 Feb 26 01:57 ./
drwxr-xr-x. 104 root root 12288 Feb 29 22:34 ../
-rwxr-xr-x    1 root root   211 Jan  4  2013 00webalizer*
-rwxr-xr-x    1 root root   332 Dec  3 15:33 0yum-daily.cron*
-rwx------    1 root root   180 Jul 31  2013 logrotate*
-rwxr-xr-x.   1 root root   618 Mar 17  2014 man-db.cron*
-rwxr-x---    1 root root   192 Jan 26  2014 mlocate*



# cd /etc/cron.weekly
# ll
total 16
drwxr-xr-x.   2 root root  4096 Jun  9  2014 ./
drwxr-xr-x. 104 root root 12288 Feb 29 22:34 ../



# cd /etc/cron.monthly
# ll
total 16
drwxr-xr-x.   2 root root  4096 Jun  9  2014 ./
drwxr-xr-x. 104 root root 12288 Feb 29 22:34 ../

Does that all look ok?

Also, I don't use awstats or webalizer, neither are 'on' in Webmin > cron jobs, but do I need to remove them from the daily and hourly directories too?

Edit: looking at it now looks like I need to add the following as daily crons?

logrotate* man-db.cron* mlocate*

I know that logrotate is needed, but not sure about man-db and mlocate?

Thu, 03/03/2016 - 14:51
andreychek

Howdy,

Hmm, you seem to be missing a variety of cron jobs.

My suggestion would be to setup another server using the same distro/version, and to grab missing files from it.

You may also want to double-check /etc/crontab, and /etc/cron.d.

-Eric

Fri, 03/04/2016 - 07:43
Brook

Can you think of any that are not showing Eric? I usually go with the Centos 'minimal' install - could that be a factor?

Here is the output of the command and contents of the dir:

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root

# For details see man 4 crontabs

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name  command to be executed




# cd /etc/cron.d
# ll
total 48
drwxr-xr-x.   2 root root  4096 Mar  3 00:43 ./
drwxr-xr-x. 104 root root 12288 Mar  4 11:35 ../
-rw-r--r--    1 root root   129 Feb 28 02:00 0hourly
-rw-------    1 root root   220 Feb 28 02:00 clamav-update
-rw-r--r--    1 root root    14 Feb  1  2013 csf-cron
-rw-------    1 root root    48 Feb 27 15:21 csf_update
-rw-r--r--    1 root root    70 Feb  1  2013 lfd-cron
-rw-r--r--    1 root root   132 Jul 27  2015 mailman
-rw-r--r--    1 root root   108 Sep 18 16:07 raid-check
-rw-r--r--    1 root root   461 Mar  1 18:13 sa-update
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