"Kevin J. Cummings" <cummings@xxxxxxxxxxxxxxxxxx> writes:
> On 08/31/2010 09:08 PM, Wolfgang S. Rupprecht wrote:
>> Why not just do reboots at 3 in the morning and it just won't matter all
>> that much. I just have a cron script in /etc/cron.daily that checks to
> No! I'm often doing something at 3AM (granted I *should* be going to
> bed before that time), and I hate it when I'm working on something the
> the system goes down for a reboot without asking first....
I've been there too. It used to just do a "shutdown -r +3 'a quick
reboot for yum'", but even with the 3 minute warning a pending reboot
was a real pain in the neck. I'd often be funbling with "ps" trying
frantically to locate the shutdown so I could kill it before it killed
me. ;-)
For the curious, here is my script. It has served me well for a few
years.
-wolfgang
#!/bin/sh
###############################################################################
## ##
## File: reboot-if-needed ##
## Author: Wolfgang S. Rupprecht <wolfgang@xxxxxxxxx> ##
## Created: Wed Dec 3 16:20:29 PST 2008 ##
## Contents: reboot a host if needed ##
## ##
## Copyright (c) 2008 Wolfgang S. Rupprecht. ##
## All rights reserved. ##
## ##
## $Id$
###############################################################################
# install reboot-if-needed /etc/cron.daily/zzzz-reboot-if-needed
# boot.log is a file we can expect to exist and is at most as old as
# the last boot-time. If yum.log is newer, we have installed or
# deleted something. It is best to reboot to make sure all the new
# files get used and the disk space for the old files gets freed up.
# was: /var/run/crond.pid for < fedora-12, where boot.log never was touched.
#
# The cron rpm sometimes gets updated by yum and this will cause cron
# to be restarted and the pid file to be touched. Use boot.log if
# possible.
if [ /var/log/yum.log -nt /var/log/boot.log ]
then
# Don't reboot if someone is logged in.
if [ -n "$(w -h)" ]
then
logger -i -s -t 'reboot-if-needed' 'Please reboot for newly installed files'
exit
fi
logger -i -s -t 'reboot-if-needed' 'a quick reboot for newly installed files (via yum)'
shutdown -r +3 'a quick reboot for newly installed files (via yum)'
fi
#
# end
#
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