Man1 - nproc.1

nproc - print the number of processing units available

nproc [/OPTION/]…

Print the number of processing units available to the current process, which may be less than the number of online processors

–all

print the number of installed processors

*–ignore*=/N/

if possible, exclude N processing units

–help

display this help and exit

–version

output version information and exit

Written by Giuseppe Scrivano.

GNU coreutils online help: https://www.gnu.org/software/coreutils/
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Copyright © 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Full documentation https://www.gnu.org/software/coreutils/nproc
or available locally via: info ’(coreutils) nproc invocation’