grep more than one word

http://rajaseelan.com/2009/07/04/how-to-search-grep-for-more-than-one-word-at-a-time/

Ignore binary files

grep -I (capitol i)

cpu frenquency on Linux

Question: my desktop has a AMD 2.2GHz CPU, but the /proc/cpuinfo shows that the frequency is only 1G Hz. Why?

Answer: the cpu has been set to a low freqency to save the power.

Ref: http://www.pantz.org/software/cpufreq/usingcpufreqonlinux.html