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 separating logical pages

    -f, --footer-numbering=STYLE
    use STYLE for numbering footer lines

    -h, --header-numbering=STYLE
    use STYLE for numbering header lines

    -i, --page-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, --first-page=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

    pREGEXP
    number only lines that contain a match for REGEXP

    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
    Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
    Copyright (C) 2002 Free Software Foundation, Inc.
    This is free software; see the source for copying conditions. There is
    NO warranty; not even for MERCHANTABILITY or FITNESS FOR  A PARTICULAR
    PURPOSE.

SEE ALSO
    The full documentation  for nl is maintained as a Texinfo manual. If
    the info and nl programs are properly installed at your site, the com-
    mand

    info nl

    should give you access to the complete manual.