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Number of CPU's in a system

Terminal - Number of CPU's in a system
grep -c '^$' /proc/cpuinfo
2011-10-09 14:05:14
User: _john
Functions: grep
0
Number of CPU's in a system

All Linux Systems I try also have an empty line per cpu in /proc/cpuinfo... little shorter then...

Alternatives

There are 9 alternatives - vote for the best!

Terminal - Alternatives
grep "processor" /proc/cpuinfo | wc -l
2009-02-17 05:39:49
User: jbcurtis
Functions: grep wc
4

/proc/cpuinfo contains information about the CPU.

Search for "processor" in the /proc/cpuinfo file

wc -l, counts the number of lines.

grep -c ^processor /proc/cpuinfo
2011-10-07 08:19:49
User: gerard
Functions: grep
1

this works for a Linux based system, other UNIX systems may have other way(s) to check the number of CPUs.

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