[CentOS] sysctl -p at startup?

Tue Jan 8 20:39:27 UTC 2013
Leon Fauster <leonfauster at googlemail.com>

Am 08.01.2013 um 20:25 schrieb Emmett Culley:
> On 01/08/2013 02:58 AM, Michael Simpson wrote:
>> On 2 January 2013 17:54, Emmett Culley <emmett at webengineer.com> wrote:
>>> I understand that the contents of /etc/sysctl.conf should be read and
>>> executed at system startup.  However that never happens and I have to run
>>> sysctl -p after every reboot to get the settings I want.
>>> This is happening on every CentOS machine and VM I have.   I can see in
>>> the startup scripts that "sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1"
>>>   is run at start up by the "apply_sysctl" function, yet the settings are
>>> never correct unless I run sysctl -p on the command line.
>>> Anybody know why that would be?
>>> It depends on whether the changes you are making using sysctl are being
>> affected by other processes later on in the startup sequence
>> I have to run sysctl -p manually in order to stop kernel messages being
>> printed to the console as even though i have them configured off in my
>> sysctl this is overridden at some other point and i get to find out all
>> about SoftMAC and its scanning ways
>> https://bugzilla.redhat.com/show_bug.cgi?id=760497
>> mike
> I ended up putting sysctl -p in to /etc/rc.local, which fixed the problem.  I thought I'd read the rc.local is deprecated, so I resisted using it.  Oh well...

for sysctl configs i suggest the /etc/sysctl.d directory (create it if ...)

for example:

$ cat /etc/sysctl.d/vpn.conf 
net.ipv4.ip_forward = 1