2017-07-24 14:02:58 -05:00
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# dmesg
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2023-08-09 07:29:02 +02:00
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> Write the kernel messages to `stdout`.
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2021-07-09 16:45:55 +02:00
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> More information: <https://manned.org/dmesg>.
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2017-07-24 14:02:58 -05:00
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- Show kernel messages:
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2024-09-30 09:10:32 +03:00
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`sudo dmesg`
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2017-07-24 14:02:58 -05:00
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2018-01-22 05:00:37 +00:00
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- Show kernel error messages:
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2025-03-13 04:41:47 +02:00
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`sudo dmesg {{[-l|--level]}} err`
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2018-01-22 05:00:37 +00:00
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2025-05-13 10:30:50 +03:00
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- Show kernel messages and keep [w]aiting for new ones, similar to `tail --follow` (available in kernels 3.5.0 and newer):
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2017-09-01 15:33:13 -03:00
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2025-03-13 04:41:47 +02:00
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`sudo dmesg {{[-w|--follow]}}`
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2017-09-01 15:33:13 -03:00
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2017-07-24 14:02:58 -05:00
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- Show how much physical memory is available on this system:
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2025-03-13 04:41:47 +02:00
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`sudo dmesg | grep {{[-i|--ignore-case]}} memory`
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2017-07-24 14:02:58 -05:00
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- Show kernel messages 1 page at a time:
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2024-09-30 09:10:32 +03:00
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`sudo dmesg | less`
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2019-01-28 05:58:49 -05:00
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- Show kernel messages with a timestamp (available in kernels 3.5.0 and newer):
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2025-03-13 04:41:47 +02:00
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`sudo dmesg {{[-T|--ctime]}}`
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2019-01-28 05:58:49 -05:00
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- Show kernel messages in human-readable form (available in kernels 3.5.0 and newer):
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2025-03-13 04:41:47 +02:00
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`sudo dmesg {{[-H|--human]}}`
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2019-01-28 05:58:49 -05:00
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- Colorize output (available in kernels 3.5.0 and newer):
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2025-03-13 04:41:47 +02:00
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`sudo dmesg {{[-L|--color]}}`
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