roff(7) [minix man page]

is  a  text formatter.	Its input consists of the text to be out-
put, intermixed with formatting commands.  A  formatting  command
is  a  line  containing  the  control character followed by a two
character command name, and possibly one or more arguments.   The
control  character is initially . (dot).  The formatted output is
produced on standard output.  The formatting commands are  listed
below, with being a number, being a character, and being a title.
A + before n means it may be signed,  indicating  a  positive  or
negative change from the current value.  Initial values for where
relevant, are given in parentheses.
  .ad	  Adjust right margin.
  .ar	  Arabic page numbers.
  .br	  Line break.  Subsequent text will begin on a new line.
  .bl n   Insert n blank lines.
  .bp +n  Begin new page and number it n. No n means +1.
  .cc c   Control character is set to c.
  .ce n   Center the next n input lines.
  .de zz  Define a macro called zz. A line with .. ends definition.
  .ds	  Double space the output. Same as .ls 2.
  .ef t   Even page footer title is set to t.
  .eh t   Even page header title is set to t.
  .fi	  Begin filling output lines as full as possible.
  .fo t   Footer titles (even and odd) are set to t.
  .hc c   The character c (e.g., %) tells roff where hyphens are permitted.
  .he t   Header titles (even and odd) are set to t.
  .hx	  Header titles are suppressed.
  .hy n   Hyphenation is done if n is 1, suppressed if it is 0. Default is 1.
  .ig	  Ignore input lines until a line beginning with .. is found.
  .in n   Indent n spaces from the left margin; force line break.
  .ix n   Same as .in but continue filling output on current line.
  .li n   Literal text on next n lines.  Copy to output unmodified.
  .ll +n  Line length (including indent) is set to n (65).
  .ls +n  Line spacing: n (1) is 1 for single spacing, 2 for double, etc.
  .m1 n   Insert n (2) blank lines between top of page and header.
  .m2 n   Insert n (2) blank lines between header and start of text.
  .m3 n   Insert n (1) blank lines between end of text and footer.
  .m4 n   Insert n (3) blank lines between footer and end of page.
  .na	  No adjustment of the right margin.
  .ne n   Need n lines.  If fewer are left, go to next page.
  .nn +n  The next n output lines are not numbered.
  .n1	  Number output lines in left margin starting at 1.
  .n2 n   Number output lines starting at n.  If 0, stop numbering.
  .ni +n  Indent line numbers by n (0) spaces.
  .nf	  No more filling of lines.
  .nx f   Switch input to file f.
  .of t   Odd page footer title is set to t.
  .oh t   Odd page header title is set to t.
  .pa +n  Page adjust by n (1).  Same as .bp
  .pl +n  Paper length is n (66) lines.
  .po +n  Page offset.	Each line is started with n (0) spaces.
  .ro	  Page numbers are printed in Roman numerals.
  .sk n   Skip n pages (i.e., make them blank), starting with next one.
  .sp n   Insert n blank lines, except at top of page.
  .ss	  Single spacing.  Equivalent to .ls 1.
  .ta	  Set tab stops, e.g., .ta 9 17 25 33 41 49 57 65 73 (default).
  .tc c   Tabs are expanded into c.  Default is space.
  .ti n   Indent next line n spaces; then go back to previous indent.
  .tr ab  Translate a into b on output.
  .ul n   Underline the letters and numbers in the next n lines.

nl(1)							      General Commands Manual							     nl(1)

NAME

       nl - line numbering filter

SYNOPSIS

       type] type] type] start#] incr] sep] width] format] num] delim] [file]

DESCRIPTION

       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 num-
       bered on the left in accordance with the command options in effect.

       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 told otherwise, assumes the text being read is in a single logical page body.

       Command options can appear in any order and can be intermingled with an optional file name.  Only one file can be  named.   recognizes  the
       following options:

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

			       number all lines;
			       number lines with printable text only;
			       no line numbering;
			       number only lines that contain the regular expression
					   specified in string.  Basic Regular Expression syntax is supported (see regexp(5)).

			  The default type for logical page body is (text lines numbered).

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

	      Same as	  except for footer.  Default for logical page footer is (no lines numbered).

	      Do not restart numbering at logical page delimiters.

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

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

	      sep	  is  the  character  or  characters used in separating the line number and the corresponding text line.  Default sep is a
			  tab.

	      width	  is the number of character columns to be used for the line number.  Default width is

	      format	  is the line numbering format.  Recognized values are:

			       left justified, leading zeroes
				     suppressed;
			       right justified,
				     leading zeroes suppressed;
			       right justified, leading zeroes kept.

			  Default format is (right justified).

	      num	  is the number of consecutive blank lines to be treated and numbered as a single line.  For  example,	results  in  every
			  third adjacent blank line being numbered if the appropriate and/or option is set.  Default is

	      The delimiter characters specifying the start of a logical page
			  section  can 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 and the delimiter characters, how-
			  ever,  this  restriction  is	not there for (see standards(5)) compliant To define a backslash as the delimiter, use two
			  backslashes.

EXTERNAL INFLUENCES

       For information about the UNIX Standard environment, see standards(5).

   Environment Variables
       determines the collating sequence used in evaluating regular expressions.

       determines the characters matched by character class expressions in regular expressions.

       If or is not specified in the environment or is set to the empty string, the value of is used as a default for each  unspecified  or  empty
       variable.  If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of

       If  any	internationalization  variable	contains an invalid setting, behaves as if all internationalization variables are set to "C".  See
       environ(5).

   International Code Set Support
       Single-byte character code sets are supported.

EXAMPLES

       Number starting at line number 10, using an increment of ten.  The logical page delimiters are and

SEE ALSO

       pr(1), environ(5), lang(5), regexp(5), standards(5).

STANDARDS CONFORMANCE

																	     nl(1)