This is a linux command line reference for common operations.

Command		Description
•	apropos whatis	Show commands pertinent to string. See also threadsafe
•	man -t ascii | ps2pdf - > ascii.pdf	make a pdf of a manual page
	which command	Show full path name of command
	time command	See how long a command takes
•	time cat	Start stopwatch. Ctrl-d to stop. See also sw
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