Mr Anand Babu (FSF-India Member) has developed the BiosConfig tool,
which reads/writes fields in the CMOS non-volatile store, most of
which are associated with various functions of the BIOS.
URL: http://savannah.nongnu.org/projects/biosconfig

One Day One Command
===================

tac — Concatenate and Print files in reverse order.

Summary:

`tac’ copies each file to standard output, reversing the records
(lines by default) in each separately. It is doing the reverse
function of the CAT command (TAC).

Example:

$ tac myfile — Print the file (Line by Line) in reverse order.

$ tac -r -s ‘[^a-zA-z0-9-]’ myfile — Print the file (Word by Word)

in reverse order, by passing the Regular expression.

$ tac -r -s ‘.|’ myfile — Print the file (Char by Char) in reverse

order.

Read: man tac