nl (1) Linux Manual Page
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’