snippetbashTip
dmesg — Write the kernel messages to `stdout`. See also: `journalctl`. More information: <https://manned.org
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thecommandstdoutclimessageswritedmesgkernel
linux
Problem
How to use the
dmesg command: Write the kernel messages to stdout. See also: journalctl. More information: <https://manned.org/dmesg>.Solution
dmesg — Write the kernel messages to stdout. See also: journalctl. More information: <https://manned.org/dmesg>.Show kernel messages:
sudo dmesgShow kernel error messages:
sudo dmesg {{[-l|--level]}} errShow kernel messages and keep [w]aiting for new ones, similar to
tail --follow (available in kernels 3.5.0 and newer):sudo dmesg {{[-w|--follow]}}Show how much physical memory is available on this system:
sudo dmesg | grep {{[-i|--ignore-case]}} memoryShow kernel messages 1 page at a time:
sudo dmesg | lessShow kernel messages with a timestamp (available in kernels 3.5.0 and newer):
sudo dmesg {{[-T|--ctime]}}Show kernel messages in human-readable form (available in kernels 3.5.0 and newer):
sudo dmesg {{[-H|--human]}}Colorize output (available in kernels 3.5.0 and newer):
sudo dmesg {{[-L|--color]}}Code Snippets
Show kernel messages
sudo dmesgShow kernel error messages
sudo dmesg {{[-l|--level]}} errShow kernel messages and keep [w]aiting for new ones, similar to `tail --follow` (available in kernels 3.5.0 and newer)
sudo dmesg {{[-w|--follow]}}Show how much physical memory is available on this system
sudo dmesg | grep {{[-i|--ignore-case]}} memoryShow kernel messages 1 page at a time
sudo dmesg | lessContext
tldr-pages: linux/dmesg
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