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<<TableOfContents>>

== 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.
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=== Disable IPv6 === == Disable IPv6 ==
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== Empty disk cache ==

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

{{{#!highlight sh
sync
echo 3 > /proc/sys/vm/drop_caches
}}}

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

   1 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. 

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

CategoryCheatSheet

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