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colcrt - Online in the Cloud

Run colcrt in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command colcrt that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



colcrt — filter nroff output for CRT previewing


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


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

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.


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


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


A typical use of colcrt would be

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

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