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Linux & Shell · Command

free

free displays free and used physical and swap memory, plus kernel buffers and caches. It reads the data from /proc/meminfo.

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Syntax

free [ option ...]

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  • /proc/meminfo
  • ps(1)
  • slabtop(1)
  • top(1)
  • vmstat(8)

Source: free(1) - Linux manual page. Checked 2026-11-03.