Table of Contentsdmesg - print or control the kernel ring buffer dmesg [ -c ] [ -n level ] dmesg is used to examine or control the kernel ring buffer. The program helps users to print out their bootup messages. Instead of copying the messages by hand, the user need only:
dmesg > boot.messages
and mail the boot.messages file to whoever can debug their problem. - -c
- clear the ring buffer contents after printing.
- -nlevel
- set the level at which logging of messages is done to the console. For example, -n 1 prevents all messages, expect panic messages, from appearing on the console. All levels of messages are still written to /proc/kmsg, so syslogd(8) can still be used to control exactly where kernel messages appear. When the -n option is used, dmesg will not print or clear the kernel ring buffer.
When both options are used, only the last option on the command line will have an effect.
syslogd(8) Theodore Ts'o (tytso@athena.mit.edu)
Table of Contents
www.fiveanddime.net