2020-06-06 04:12:44 +02:00
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memtester (memory test utility)
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2021-08-24 21:20:05 +02:00
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memtester is a userspace utility for testing the memory subsystem
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for faults. Unlike memtest86, it runs as a process on a running Linux
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system, meaning it can't test all of memory the way memtest86 is able
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to... but you don't have to reboot to use it.
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2020-06-06 04:12:44 +02:00
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Note that, by definition, memtester counts as a denial-of-service
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(resource exhaustion) attack against the local machine. Be cautious
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about using it, and definitely *read its man page* before use.
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memtester has traditionally been run as root, so that it can lock the
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memory it's testing to prevent swapping and remapping. However, it's
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possible to use capabilities to allow it to run correctly as a normal
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user. Use something like:
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# chown root:console /usr/bin/memtester
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# chmod 0750 /usr/bin/memtester
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# setcap cap_ipc_lock=ep /usr/bin/memtester
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This allows anyone in the "console" group to run memtester. You could
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also create a memtester group and use it in the chown command above,
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if you'd rather have more fine-grained control.
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