CentOS 7.0 - man page for colcrt (centos section 1)
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COLCRT(1) User Commands COLCRT(1)
colcrt - filter nroff output for CRT previewing
colcrt [options] [file ...]
colcrt 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
Suppress all underlining. This option is especially useful for previewing allboxed
tables from tbl(1).
Causes all half-lines to be printed, effectively double spacing the output. Nor-
mally, 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.
Output version information and exit.
Output help and exit.
A typical use of colcrt would be
tbl exum2.n | nroff -ms | colcrt - | more
nroff(1), troff(1), col(1), more(1), ul(1)
Should fold underlines onto blanks even with the '-' option so that a true underline char-
acter would show.
Can't back up more than 102 lines.
General overstriking is lost; as a special case '|' overstruck with '-' or underline
Lines are trimmed to 132 characters.
Some provision should be made for processing superscripts and subscripts in documents
which are already double-spaced.
The colcrt command appeared in 3.0BSD.
The colcrt command is part of the util-linux package and is available from Linux Kernel
util-linux September 2011 COLCRT(1)
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