nl(1)                                                                    nl(1)



NAME
     nl - line numbering filter

SYNOPSIS
     nl [-btype] [-ftype] [-htype] [-vstart#] [-iincr] [-p] [-lnum] [-ssep]
     [-wwidth] [-nformat] [-ddelim] [file]

DESCRIPTION
     nl reads lines from the named file, or the standard input if no file is
     named, and reproduces the lines on the standard output.  Lines are
     numbered on the left in accordance with the command options in effect.
     nl processes supplementary code set characters according to the locale
     specified in the LCCTYPE environment variable [see LANG on environ(5)],
     except as noted below.  In regular expressions, pattern searches are
     performed on characters, not bytes, as described on ed(1).

     nl views the text it reads in terms of logical pages.  Line numbering is
     reset at the start of each logical page.  A logical page consists of a
     header, a body, and a footer section.  Empty sections are valid.
     Different line numbering options are independently available for header,
     body, and footer.  For example, -bt (the default) numbers non-blank lines
     in the body section and does not number any lines in the header and
     footer sections.

     The start of logical page sections are signaled by input lines containing
     nothing but the following delimiter character(s):

          Line contents  Start of

          \:\:\:         header

          \:\:           body

          \:             footer

     Unless optioned otherwise, nl assumes the text being read is in a single
     logical page body.

     Command options may appear in any order and may be intermingled with an
     optional file name.  Only one file may be named.  The options are:

     -btype    Specifies which logical page body lines are to be numbered.
               Recognized types and their meanings are:

        a    number all lines

        t    number lines with printable text only

        n    no line numbering

        pexp number only lines that contain the regular expression

             specified in exp [see ed(1)]

     Default type for logical page body is t (text lines numbered).  All
     supplementary code set characters are considered printable.




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nl(1)                                                                    nl(1)



     -ftype    Same as -btype except for footer.  Default type for logical
               page footer is n (no lines numbered).  All supplementary code
               set characters are considered printable.

     -htype    Same as -btype except for header.  Default type for logical
               page header is n (no lines numbered).  All supplementary code
               set characters are considered printable.

     -vstart#  start# is the initial value used to number logical page lines.
               Default start# is 1.

     -iincr    incr is the increment value used to number logical page lines.
               Default incr is 1.

     -p        Do not restart numbering at logical page delimiters.

     -lnum     num is the number of blank lines to be considered as one.  For
               example, -l2 results in only the second adjacent blank being
               numbered (if the appropriate -ha, -ba, and/or -fa option is
               set).  Default num is 1.

     -ssep     sep is the character(s) used in separating the line number and
               the corresponding text line.  Default sep is a tab.  sep must
               be a single-byte character or characters.

     -wwidth   width is the number of characters to be used for the line
               number.  Default width is 6. The maximum for width is 100.  If
               a number greater than the maximum is specified for width, the
               maximum is automatically be used.

     -nformat  format is the line numbering format.  Recognized values are:
               ln, left justified, leading zeroes suppressed; rn, right
               justified, leading zeroes suppressed; rz, right justified,
               leading zeroes kept.  Default format is rn (right justified).

     -ddelim   The two delimiter characters specifying the start of a logical
               page section may be changed from the default characters (\:) to
               two user-specified characters.  If only one character is
               entered, the second character remains the default character
               (:).  No space should appear between the -d and the delimiter
               characters.  To enter a backslash, use two backslashes.  delim
               must be a single-byte character or characters.

EXAMPLE
     The command:

               nl -v10 -i10 -d!+ file1

     will cause the first line of the page body to be numbered 10, the second
     line of the page body to be numbered 20, the third 30, and so forth.  The
     logical page delimiters are !+.




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nl(1)                                                                    nl(1)



FILES
     /usr/lib/locale/locale/LCMESSAGES/uxdfm
          language-specific message file [See LANG on environ(5).]

SEE ALSO
     pr(1), ed(1)

















































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