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ODOC: dmesg

dmesg – Print or Control the kernel ring buffer

Summary :

dmesg is used to examine or control the kernel ring buffer. The program helps users to print out their boot-up messages.

Example:

$ dmesg — Print the kernel boot-up messages.

$ dmesg > boot.mesg — Redirect the out to file.

# dmesg -c — Clear the ring buffer after printing.

# dmesg -s4096 — Set the kernel ring buffer size.

# dmesg -n1 — Set the level at which logging of messages is done to the console.

1 — Action must be taken immediately
2 — Critical conditions
3 — Error conditions
4 — Warning conditions
5 — Normal but significant condition
6 — Informational
7 — Debug-level messages
8 — All

Read: man dmesg
odoc, dmesg,linux, gnu/linux, kernel