Ubuntu - CPU - Display the number of processors

To display the number of CPUs.

Using /proc/cpuinfo

cat /proc/cpuinfo | grep processor | wc -l

returns:

NOTE: /proc/cpuinfo contains all of the processor information for all current processors in the system.

This will include the speed, and the amount of on-chip cache, processor architecture type, and the number of cores.

lscpu | egrep 'CPU\(s\)'

returns:

CPU(s):                          24
On-line CPU(s) list:             0-23
NUMA node0 CPU(s):               0-23

nproc

returns: