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On my computer, uname -m prints x86_64 as output. What is the list of possible values that this command could output? I intend to use this command from a dynamic runtime to check the CPU architecture.

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I’m not aware of a definitive list of possible values; however there is a list of values for all Debian architectures, which gives good coverage of the possible values on Linux: aarch64, alpha, arc, arm, i?86, ia64, m68k, mips, mips64, parisc, ppc, ppc64, ppc64le, ppcle, riscv64, s390, s390x, sh, sparc, sparc64, x86_64 (there are other possible values, but they’re not supported by Debian; I’m ignoring the Hurd here). Another source of information is the $UNAME_MACHINE matches in config.guess; this isn’t limited to Linux.

Note that uname -m reflects the current process’ personality, and the running kernel’s architecture; not necessarily the CPU architecture. See Meaning of hardware platform in uname command ouput for details.

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