I made some changes to sysctl.conf but now need to run sysctl -p on each boot. I can always create an init script to have it run automatically on boot, but I was wondering if there was an Ubuntu / Debian way of doing it.
3 Answers
There is a better and more ellegant way:
create your configuration file on /etc/sysctl.d/ directory.
For example, if you changing kernel parameters due to database requirements, create a file:
/etc/sysctl.d/60-mysql.conf
and add your own parameters inside it. To execute it:
service procps restart
Just to note:
procps is a system file and it should NEVER be edited.
/etc/sysctl.conf should not be edited either because it can be changed on a system/kernel upgrade and if it's differente from expected, upgrade will be halted asking if newer version can replace current one.
Reference: http://manpages.ubuntu.com/manpages/precise/man8/sysctl.8.html
You add your desired sysctls into /etc/sysctl.conf
and they will be applied at boot time. However, if you have updated /etc/sysctl.conf
and what to apply it immediately, run:
sudo sysctl --system
-
It's actually
sysctl -p
to reload/etc/sysctl.conf
file. You can also read the settings from your own file, by specifying it after the-p
option, for examplesysctl -p /home/user/custom.conf
.– CleankodJan 15, 2014 at 14:33
On Ubuntu the Upstart job procps
(/etc/init/procps.conf
) already does that for you.
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1Hi Florian, I understand that your post has the intention to be educational. But an unwary user could imagine that he/she have to edit procps.conf what would be a disaster, don't you agree?– josircgFeb 22, 2014 at 12:56
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it turns out there is more than just
sysctl.conf
andprocps.conf
: the issue with pm-utils and laptop-mode– xealitsNov 9, 2017 at 11:58