colcrt man page on Kali

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COLCRT(1)		  BSD General Commands Manual		     COLCRT(1)

NAME
     colcrt — filter nroff output for CRT previewing

SYNOPSIS
     colcrt [-] [-2] [file ...]

DESCRIPTION
     The colcrt utility provides virtual half-line and reverse line feed
     sequences for terminals without such capability, and on which overstrik‐
     ing is destructive.  Half-line characters and underlining (changed to
     dashing `-') are placed on new lines in between the normal output lines.

     The following options are available:

     -	     Suppress all underlining.	This option is especially useful for
	     previewing allboxed tables from tbl(1).

     -2	     Cause all half-lines to be printed, effectively double spacing
	     the output.  Normally, a minimal space output format is used
	     which will suppress empty lines.  The program never suppresses
	     two consecutive empty lines, however.  The -2 option is useful
	     for sending output to the line printer when the output contains
	     superscripts and subscripts which would otherwise be invisible.

ENVIRONMENT
     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution
     of colcrt as described in environ(7).

EXIT STATUS
     The colcrt utility exits 0 on success, and >0 if an error occurs.

EXAMPLES
     A typical use of colcrt would be

     tbl exum2.n | nroff -ms | colcrt - | more

SEE ALSO
     col(1), more(1), nroff(1), troff(1), ul(1)

HISTORY
     The colcrt command appeared in 3.0BSD.

BUGS
     Should fold underlines onto blanks even with the ‘-’ option so that a
     true underline character would show.

     Cannot back up more than 102 lines.

     General overstriking is lost; as a special case ‘|’ overstruck with ‘-’
     or underline becomes ‘+’.

     Lines are trimmed to 132 characters.

     Some provision should be made for processing superscripts and subscripts
     in documents which are already double-spaced.

     Characters that take up more than one column position may not be under‐
     lined correctly.

BSD				 July 31, 2004				   BSD
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