Linux cli command nl

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command nl and provides detailed information about the command nl, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the nl.

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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 ‘:’. As a GNU extension one can specify more than two characters, and also specifying the empty string (-d ‘’) disables section matching.

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 © 2023 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’

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