Differences between revisions 6 and 7
⇤ ← Revision 6 as of 2010-10-19 21:51:41 →
Size: 821
Editor: SamatJain
Comment:
← Revision 7 as of 2011-02-08 01:53:47 → ⇥
Size: 845
Editor: SamatJain
Comment: Remove line numbers
Deletions are marked like this. Additions are marked like this.
Line 15: Line 15:
{{{#!highlight sh {{{#!highlight sh numbers=off
Line 27: Line 27:
{{{#!highlight sh {{{#!highlight sh numbers=off

Contents

  1. Automatically reboot on kernel panic
  2. Compiling a single Linux kernel module
  3. Disable IPv6
  4. Empty disk cache

Automatically reboot on kernel panic

Linux can automatically reboot after a kernel panic. The sysctl /proc/sys/kernel/panic controls this; 0 (default) disables the behavior, while any value greater than zero is the number of seconds to wait before reboot. This can be made persistent by setting in /etc/sysctl.conf: 

kernel.panic = 5

Linux will wait 5 seconds before automatically rebooting.

Compiling a single Linux kernel module

make -C /lib/modules/`unam e -r`/build M=`pwd`

Disable IPv6

Add ipv6.disable=1 as a kernel boot parameter.

Empty disk cache

Forces the Linux kernel to discard/invalidate all disk caches. 

sync
echo 3 > /proc/sys/vm/drop_caches

CategoryCheatSheet

SamatsWiki: CheatSheet/LinuxKernel (last edited 2011-02-08 01:53:47 by SamatJain)