how to configure printk() in 2.6 kernel
Hi, Can somebody please tell me how to configure printk() in fedora 15 ? All the articles I have seen on web refer to the file /etc/syslog.conf. But there is no such file on my system. I guess this has changed in the 2.6 kernel. Thanks Vaibhav Jain
Hi Vaibhav, Try /etc/rsyslog.conf. However you should be using /proc/sys/kernel/printk to really configure printk. Hope this helps, Ramesh On Mon, Aug 29, 2011 at 8:46 AM, Vaibhav Jain <vjoss197@gmail.com> wrote:
Hi, Can somebody please tell me how to configure printk() in fedora 15 ? All the articles I have seen on web refer to the file /etc/syslog.conf. But there is no such file on my system. I guess this has changed in the 2.6 kernel.
Thanks Vaibhav Jain
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On Mon, Aug 29, 2011 at 3:24 PM, Ramesh.P <rameshpa@gmail.com> wrote:
Hi Vaibhav,
Try /etc/rsyslog.conf. However you should be using /proc/sys/kernel/printk to really configure printk.
Hope this helps, Ramesh
On Mon, Aug 29, 2011 at 8:46 AM, Vaibhav Jain <vjoss197@gmail.com> wrote:
Hi, Can somebody please tell me how to configure printk() in fedora 15 ? All the articles I have seen on web refer to the file /etc/syslog.conf. But there is no such file on my system. I guess this has changed in the 2.6 kernel.
Thanks Vaibhav Jain
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Hi Ramesh, As I mentioned /etc/syslog.conf is not there on my system. Could you please tell me if the name has changed for the file in 2.6 kernel ? Also, does /proc/sys/kernel/printk provides for the same level of control ? Thanks Vaibhav Jain
On Tue, Aug 30, 2011 at 06:38, Vaibhav Jain <vjoss197@gmail.com> wrote:
Hi Ramesh,
As I mentioned /etc/syslog.conf is not there on my system.
maybe because Fedora now use rsyslog or syslog-ng. In Mint, by default it uses rsyslog and the configuration file is located at /etc/rsyslog.conf -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
On Mon, Aug 29, 2011 at 04:38:03PM -0700, Vaibhav Jain wrote:
On Mon, Aug 29, 2011 at 3:24 PM, Ramesh.P <rameshpa@gmail.com> wrote:
Hi Vaibhav,
Try /etc/rsyslog.conf. However you should be using /proc/sys/kernel/printk to really configure printk.
[snip]
Hi Ramesh,
As I mentioned /etc/syslog.conf is not there on my system. Could you please tell me if the name has changed for the file in 2.6 kernel ? Also, does /proc/sys/kernel/printk provides for the same level of control ?
Syslog is a user space program, that collects the kernel messages. So if you don't have /etc/syslog.conf on your system, it likely just means that you don't have a standard installation of the syslog program, which can have different reasons. AFAIK, syslog has been replaced by rsyslog or syslog-ng on modern desktop linux distros. BTW, Ramesh told you to try /etc/rsyslog.conf (note the 'r'), not /etc/syslog.conf. HTH, Jonathan Neuschäfer
On Tue, Aug 30, 2011 at 12:25 PM, Jonathan Neuschäfer <j.neuschaefer@gmx.net
wrote:
On Mon, Aug 29, 2011 at 04:38:03PM -0700, Vaibhav Jain wrote:
On Mon, Aug 29, 2011 at 3:24 PM, Ramesh.P <rameshpa@gmail.com> wrote:
Hi Vaibhav,
Try /etc/rsyslog.conf. However you should be using /proc/sys/kernel/printk to really configure printk.
[snip]
Hi Ramesh,
As I mentioned /etc/syslog.conf is not there on my system. Could you please tell me if the name has changed for the file in 2.6 kernel ? Also, does /proc/sys/kernel/printk provides for the same level of control ?
Syslog is a user space program, that collects the kernel messages. So if you don't have /etc/syslog.conf on your system, it likely just means that you don't have a standard installation of the syslog program, which can have different reasons. AFAIK, syslog has been replaced by rsyslog or syslog-ng on modern desktop linux distros.
BTW, Ramesh told you to try /etc/rsyslog.conf (note the 'r'), not /etc/syslog.conf.
HTH, Jonathan Neuschäfer
Hi, Thanks for reply! I found the rsyslog.conf on my system. But I am finding it hard to configure it. Actually I made some changes but they are not working. I made some changes to the kernel and wanted that they appear at either the console or some other file. However the changes don't work. I tried adding the following lines (one at a time) kern.* /dev/console kern.* <file in my home directory> but on making these changes other kernel messages also stop showing up. Can you please give me some idea as to why this might happen ? -Thanks Vaibhav Jain
From: kernelnewbies-bounces@kernelnewbies.org [mailto:kernelnewbies-bounces@kernelnewbies.org] On Behalf Of Vaibhav Jain Sent: Wednesday, August 31, 2011 1:08 PM To: Jonathan Neuschäfer Cc: kernelnewbies@kernelnewbies.org Subject: Re: how to configure printk() in 2.6 kernel On Tue, Aug 30, 2011 at 12:25 PM, Jonathan Neuschäfer <j.neuschaefer@gmx.net> wrote: On Mon, Aug 29, 2011 at 04:38:03PM -0700, Vaibhav Jain wrote:
On Mon, Aug 29, 2011 at 3:24 PM, Ramesh.P <rameshpa@gmail.com> wrote:
Hi Vaibhav,
Try /etc/rsyslog.conf. However you should be using /proc/sys/kernel/printk to really configure printk.
[snip]
Hi Ramesh,
As I mentioned /etc/syslog.conf is not there on my system. Could you please tell me if the name has changed for the file in 2.6 kernel ? Also, does /proc/sys/kernel/printk provides for the same level of control ?
Syslog is a user space program, that collects the kernel messages. So if you don't have /etc/syslog.conf on your system, it likely just means that you don't have a standard installation of the syslog program, which can have different reasons. AFAIK, syslog has been replaced by rsyslog or syslog-ng on modern desktop linux distros. BTW, Ramesh told you to try /etc/rsyslog.conf (note the 'r'), not /etc/syslog.conf. HTH, Jonathan Neuschäfer Hi, Thanks for reply! I found the rsyslog.conf on my system. But I am finding it hard to configure it. Actually I made some changes but they are not working. I made some changes to the kernel and wanted that they appear at either the console or some other file. However the changes don't work. I tried adding the following lines (one at a time) kern.* /dev/console kern.* <file in my home directory> but on making these changes other kernel messages also stop showing up. Can you please give me some idea as to why this might happen ? -Thanks Vaibhav Jain See if this helps: echo 7 > /proc/sys/kernel/printk Jeff Haran
Thanks but didn't help :( My configurations in the rsyslog.conf file are still not working. I added the line kern.* <filename in my home dir> but the file remains empty and teh kernel messages are not there even in the /var/log/messages file. Thanks Vaibhav Jain On Wed, Aug 31, 2011 at 1:29 PM, Jeff Haran <jharan@bytemobile.com> wrote:
** **
** **
*From:* kernelnewbies-bounces@kernelnewbies.org [mailto: kernelnewbies-bounces@kernelnewbies.org] *On Behalf Of *Vaibhav Jain *Sent:* Wednesday, August 31, 2011 1:08 PM *To:* Jonathan Neuschäfer *Cc:* kernelnewbies@kernelnewbies.org *Subject:* Re: how to configure printk() in 2.6 kernel****
** **
****
On Tue, Aug 30, 2011 at 12:25 PM, Jonathan Neuschäfer < j.neuschaefer@gmx.net> wrote:****
On Mon, Aug 29, 2011 at 04:38:03PM -0700, Vaibhav Jain wrote:
On Mon, Aug 29, 2011 at 3:24 PM, Ramesh.P <rameshpa@gmail.com> wrote:
Hi Vaibhav,
Try /etc/rsyslog.conf. However you should be using /proc/sys/kernel/printk to really configure printk. ****
[snip]****
Hi Ramesh,
As I mentioned /etc/syslog.conf is not there on my system. Could you
please
tell me if the name has changed for the file in 2.6 kernel ? Also, does /proc/sys/kernel/printk provides for the same level of control ?****
Syslog is a user space program, that collects the kernel messages. So if you don't have /etc/syslog.conf on your system, it likely just means that you don't have a standard installation of the syslog program, which can have different reasons. AFAIK, syslog has been replaced by rsyslog or syslog-ng on modern desktop linux distros.
BTW, Ramesh told you to try /etc/rsyslog.conf (note the 'r'), not /etc/syslog.conf.
HTH, Jonathan Neuschäfer****
****
****
Hi,****
****
Thanks for reply! I found the rsyslog.conf on my system. But ****
I am finding it hard to configure it. Actually I made some changes but they are not working.****
I made some changes to the kernel and wanted that they appear at either the console or ****
some other file. However the changes don't work.****
I tried adding the following lines (one at a time) ****
****
kern.* /dev/console****
****
kern.* <file in my home directory>****
****
****
but on making these changes other kernel messages also stop showing up.*** *
****
Can you please give me some idea as to why this might happen ?****
****
-Thanks****
Vaibhav Jain****
** **
See if this helps:****
** **
echo 7 > /proc/sys/kernel/printk****
** **
Jeff Haran****
** **
2011/8/31 Vaibhav Jain <vjoss197@gmail.com>:
Thanks but didn't help :( My configurations in the rsyslog.conf file are still not working.
I added the line
kern.* <filename in my home dir>
but the file remains empty and teh kernel messages are not there even in the /var/log/messages file.
Thanks Vaibhav Jain
On Wed, Aug 31, 2011 at 1:29 PM, Jeff Haran <jharan@bytemobile.com> wrote:
From: kernelnewbies-bounces@kernelnewbies.org [mailto:kernelnewbies-bounces@kernelnewbies.org] On Behalf Of Vaibhav Jain Sent: Wednesday, August 31, 2011 1:08 PM To: Jonathan Neuschäfer Cc: kernelnewbies@kernelnewbies.org Subject: Re: how to configure printk() in 2.6 kernel
On Tue, Aug 30, 2011 at 12:25 PM, Jonathan Neuschäfer <j.neuschaefer@gmx.net> wrote:
On Mon, Aug 29, 2011 at 04:38:03PM -0700, Vaibhav Jain wrote:
On Mon, Aug 29, 2011 at 3:24 PM, Ramesh.P <rameshpa@gmail.com> wrote:
Hi Vaibhav,
Try /etc/rsyslog.conf. However you should be using /proc/sys/kernel/printk to really configure printk.
[snip]
Hi Ramesh,
As I mentioned /etc/syslog.conf is not there on my system. Could you please tell me if the name has changed for the file in 2.6 kernel ? Also, does /proc/sys/kernel/printk provides for the same level of control ?
Syslog is a user space program, that collects the kernel messages. So if you don't have /etc/syslog.conf on your system, it likely just means that you don't have a standard installation of the syslog program, which can have different reasons. AFAIK, syslog has been replaced by rsyslog or syslog-ng on modern desktop linux distros.
BTW, Ramesh told you to try /etc/rsyslog.conf (note the 'r'), not /etc/syslog.conf.
HTH, Jonathan Neuschäfer
Hi,
Thanks for reply! I found the rsyslog.conf on my system. But
I am finding it hard to configure it. Actually I made some changes but they are not working.
I made some changes to the kernel and wanted that they appear at either the console or
some other file. However the changes don't work.
I tried adding the following lines (one at a time)
kern.* /dev/console
kern.* <file in my home directory>
but on making these changes other kernel messages also stop showing up.
Can you please give me some idea as to why this might happen ?
-Thanks
Vaibhav Jain
See if this helps:
echo 7 > /proc/sys/kernel/printk
Jeff Haran
To me it looks like rsyslog is trying to do the right thing but can't write to the target file. Maybe selinux is preventing it from doing so?
Mirco
participants (6)
-
Jeff Haran -
Jonathan Neuschäfer -
Mirco Tischler -
Mulyadi Santosa -
Ramesh.P -
Vaibhav Jain