How many CPU in the system : commands : cat /proc/cpuinfo [root@server ~]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Xeon(TM) CPU 3.40GHz stepping : 3 cpu MHz : 3401.008 cache size : 2048 KB physical id : 0 siblings : 2 [...]