I have the following system :$ uname -aLinux <machine-name-snip> 2.6.18-92.el5 #1 SMP Tue Apr 29 13:16:58 EDT 2008 s390x s390x s390x GNU/Linux$ cat /etc/redhat-releaseRed Hat Enterprise Linux Server release 5.2 (Tikanga)I need to find the cpu frequency, after a little bit of reading and referring to a links I tried  cat /proc/cpuinfo vendor_id       : IBM/S390 # processors    : 2 bogomips per cpu: 6396.31 features        : <some features> processor 0: version = FF,  identification = <some id>,  machine = 2827 processor 1: version = FF,  identification = <some other id>,  machine = 2827now I am not sure how to convert this bogomips per cpu into the cpu speed. I have already referred to this link, but I am not sure how I should convert the bogomips to cpu speed./sys/devices/system/cpu/cpu0/ -- > does not return cpu frequency for me to use this in order to get a responseEdit 1: I have tried all the answers mentioned below in most of cases either the command is not found, or the output does not contain any information regarding the cpu frequency. I am guessing there must be something wrong with the installation of the machine as a lot of the below mentioned commands are not found.  
command to find processor speed on zlinux machine
command line;cpu frequency