Number lines Supports primitive form of markup Supports concept of "logical pages".

Markup	Meaning
\:\:\:	Start of logical page header
\:\:	Start of logical page body
\:	Start of logical page footer

nl Markup

Must appear on it's own line

Option	Meaning
-b style	Set body numbering to style, where style is one of the following:
	a = Number all lines
	t = Number only non-blank lines. This is the default.
	n = None
	pregex = Number only lines matching the BRE regex
-f style	Set footer numbering to style, default is n (none).
-h style	Set header numbering to style, The default is one.
-n format	Sets numbering format to format, where format is one of the following:
	ln = Left justified, without leading zeros.
	rn = Right justified, without leading zeros
	rz = Right justified, with leading zeros.
-p	Do not reset page numbering at the beginning of each logical page
-s string	Add string to the end of each line number to create a separator.
	The default is a single tab char.
-v number	Set first line number of each logical page to number.
	The default is one.
-w width	Set width of the line number field to width. The default is 6.

Common nl Options