dmesg

Additional Notes

dmesg prints the kernel ring buffer messages, which contain hardware detection, driver loading, filesystem, and system event information. It is especially useful for debugging hardware issues, viewing boot messages, and monitoring device events.

Syntax

dmesg [options] [arguments]

Parameters

• options: Flags that change how dmesg behaves.

Common Options

• -T: Show human readable timestamps when supported.
• -w: Follow new messages.
• -l LEVEL: Filter by log level.
• -H: Human friendly output.

Examples

dmesg
dmesg -T
dmesg -w
dmesg -l err

Practical Notes

dmesg is useful for hardware, driver, boot, and kernel troubleshooting.