nl(1)       UNIX System V(Directory and File Management Utilities)        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 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).

      -ftype    Same as -btype except for footer.  Default type for logical
                page footer is n (no lines numbered).




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nl(1)       UNIX System V(Directory and File Management Utilities)        nl(1)


      -htype    Same as -btype except for header.  Default type for logical
                page header is n (no lines numbered).

      -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.

      -wwidth   width is the number of characters to be used for the line
                number.  The default for 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.

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 !+.

SEE ALSO
      pr(1), ed(1).







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