If you want to know all about the CPU(s) on your system, then check the /proc/cpuinfo file.
[root@localhost ~]# cat /proc/cpuinfo
This will give you the following output.
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 3
model name : Pentium II (Klamath)
stepping : 3
cpu MHz : 1729.327
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic pge
cmov pat mmx fxsr sse sse2 up pni
bogomips : 3527.30
clflush size : 32
This file has important information about the CPU.
