grep

Function	Print lines that match a pattern, from a page body or from stdin (pipe).
Options	See table below. Options can be combined.
Limitations	A bare grep with no pattern/path and no pipe reports a missing operand.

Option	Meaning
-i	Ignore case
-v	Invert match (lines that do not match)
-n	Prefix each line with its line number
-c	Print a count of matching lines instead of the lines

Matching lines are printed one per line.

Examples

$ grep a ./page1
$ grep -n pattern ./page1
$ grep -c pattern ./page1
$ ls | grep -i page
$ ls | grep -v Draft

See help grep in the console for the same option list.