The easiest way to check CPU speed and CPU model on Linux is to issue the below command from the CLI.

more /proc/cpuinfo | egrep 'model name|cpu MHz'

This will return results like the below that will list CPU model name on one line followed by CPU speed on the next line.

[root@server ~]# less /proc/cpuinfo | egrep 'model name|cpu MHz'
model name : Dual-Core AMD Opteron(tm) Processor 2212
cpu MHz : 2010.302
model name : Dual-Core AMD Opteron(tm) Processor 2212
cpu MHz : 2010.302
model name : Dual-Core AMD Opteron(tm) Processor 2212
cpu MHz : 2010.302
model name : Dual-Core AMD Opteron(tm) Processor 2212
cpu MHz : 2010.302

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