I know that crontab -r removes the user's crontab, but what's more likely (based on your content) is that a new version of cron was installed -- and that process somehow overwrote the existing crontab with what looks like a default version.
I have a line in my crontab that does a periodic save: # 2018-1121: 1533: Save the current crontab for later backup 36 8,15 * * * crontab -l >/home/web/crontab.latest I then use rsync to back that file (and others) up to a safe place. Alex On Wed, Jan 9, 2019 at 11:45 AM Darryl Moore via talk <[email protected]> wrote: > so I have about 100 servers running 16.04 spread over North America. > > Today it became apparent that the root user cron script was deleted on > all 100 of them. The script is at /var/spool/cron/crontab/root and > everything I had has been deleted and replaced with > > # DO NOT EDIT THIS FILE - edit the master and reinstall. > # (- installed on Fri Dec 28 08:18:31 2018) > # (Cron version -- $Id: crontab.c,v 2.13 1994/01/17 03:20:37 vixie Exp $) > > crontabs were all originally installed using the crontab executable. > when I redo it the same way I get the proper crontab file but with this > above header added. This was never the case before. I do not have > automatic updates turned on on any of my machines. The date stamp in > this header is within a few seconds of the above on all my machines. I > also have a few machines running Armbian, and they are exactly the same. > > This is a major F*up for me and I have no idea how it happened. Has > anybody else had similar experiences? I'd love to know. > > regards, > darryl > --- > Talk Mailing List > [email protected] > https://gtalug.org/mailman/listinfo/talk > -- Alex Beamish Software Developer / https://ca.linkedin.com/in/alex-beamish-5111ba3 Speaker Wrangler / Toronto Perlmongers / http://to.pm.org/ Baritone, Operations Manager / Toronto Northern Lights, 2013 Champions / www.northernlightschorus.com Certified Contest Administrator / Barbershop Harmony Society / www.barbershop.org
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