nl: Number lines of files

DESCRIPTION

Write each FILE to standard output, with line numbers added. With no FILE, or when FILE is -, read standard input.

Mandatory arguments to long options are mandatory for short options too.

-b, --body-numbering=STYLE: use STYLE for numbering body lines
-d, --section-delimiter=CC: use CC for separating logical pages
-f, --footer-numbering=STYLE: use STYLE for numbering footer lines
-h, --header-numbering=STYLE: use STYLE for numbering header lines
-i, --line-increment=NUMBER: line number increment at each line
-l, --join-blank-lines=NUMBER: group of NUMBER empty lines counted as one
-n, --number-format=FORMAT: insert line numbers according to FORMAT
-p, --no-renumber: do not reset line numbers at logical pages
-s, --number-separator=STRING: add STRING after (possible) line number
-v, --starting-line-number=NUMBER: first line number on each logical page
-w, --number-width=NUMBER: use NUMBER columns for line numbers
--help: display this help and exit
--version: output version information and exit

By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn. CC are two delimiter characters for separating logical pages, a missing second character implies :. Type \\ for \. STYLE is one of:

a: number all lines
t: number only nonempty lines
n: number no lines
pBRE: number only lines that contain a match for the basic regular expression, BRE

FORMAT is one of:

ln: left justified, no leading zeros
rn: right justified, no leading zeros
rz: right justified, leading zeros

nl (1)

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