$ curl cheat.sh/
# nproc
# Print the number of processing units (normally CPUs) available.
# More information: <https://www.gnu.org/software/coreutils/nproc>.

# Display the number of available processing units:
nproc

# Display the number of installed processing units, including any inactive ones:
nproc --all

# If possible, subtract a given number of units from the returned value:
nproc --ignore count

$
Follow @igor_chubin cheat.sh tldr