nl (1) - Linux Manuals

nl: number lines of files

NAME

nl - number lines of files

SYNOPSIS

nl [,OPTION/]... [,FILE/]...

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 logical page delimiters
-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 for each section
-s, --number-separator=,STRING/
add STRING after (possible) line number
-v, --starting-line-number=,NUMBER/
first line number for each section
-w, --number-width=,NUMBER/
use NUMBER columns for line numbers
--help
display this help and exit
--version
output version information and exit

Default options are: -bt -d'\:' -fn -hn -i1 -l1 -n'rn' -s<TAB> -v1 -w6

CC are two delimiter characters used to construct logical page delimiters; a missing second character implies ':'.

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

AUTHOR

Written by Scott Bartram and David MacKenzie.

REPORTING BUGS

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT

Copyright © 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

Full documentation <https://www.gnu.org/software/coreutils/nl>
or available locally via: info '(coreutils) nl invocation'