FreeBSD6 Unleashed

Common Shell Commands

Command	Action
grep pattern filename	Searches the file filename for the specified pattern or regular expression. (See Chapter 8; also refer to Chapter 11, “Introduction to Perl Programming,” for more information on regular expressions.)
less filename	Views the contents of filename one screen at a time. The more command is a synonym for less. (See Chapter 8.)
cat filename	Displays (catenates) the contents of filename. cat is normally used with redirection or pipes to send a file’s contents through another command. (See Chapter 8.)
wc filename	Displays the number of words, lines, and characters in filename. (See Chapter 8.)
diff file1 file2	Compares the contents of file1 with the contents of file2 and then displays the differences between ...