


      NL(1)                       (UNIX 5.0)                      NL(1)



      NAME
           nl - line numbering filter

      SYNTAX
           nl [-htype] [-btype] [-ftype] [-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 (e.g. no numbering of header and footer
           lines while numbering blank lines only in the body).

           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 meaning are:
                     a, number all lines; t, number lines with
                     printable text only; n, no line numbering;
                     pstring, number only lines that contain the
                     regular expression specified in string.  Default
                     type for logical page body is t (text lines
                     numbered).

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




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      NL(1)                       (UNIX 5.0)                      NL(1)



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

           -p        Do not restart numbering at logical page
                     delimiters.

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

           -iincr    Incr is the increment value used to number logical
                     page lines.  Default 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.  Default width is 6.

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

           -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 is 1.

           -dxx      The 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 file2

           will number files 1 and 2 starting at line number 10 with an
           increment of ten.  The logical page delimiters are !+.

      SEE ALSO
           pr(1).





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