dmesg

SafeShow kernel ring buffer

dmesg -T | tail

Kernel messages: first stop for disk errors, OOM kills, driver faults. -T shows real timestamps.

Examples

dmesg -T --level=err,warnErrors and warnings only

Syntax

dmesg [-T] [--level=err]

Before you run it

Read only.

Used when you see

Linux disk health check

Check kernel logs for I/O errors

See the whole flow →

Processes vanish (OOM killer)

Confirm OOM-killer entries in kernel logsLook for 'Out of memory: Killed process'.

See the whole flow →

Related commands

journalctlsystemd logs
tailFollow file tail
smartctlDisk health via SMART

The same reference, with no signal at all

Every command on this site, held on your device. The app adds 632 more: 1,510 commands and 120 fix flows, searchable with no connection. Free to install, no ads (some content is a one-time purchase).

Get it free on the App Store