COLCRT - Online Linux Manual PageSection : 1
Updated : 2022-05-11
Source : util−linux 2.38.1
Note : User Commands
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NAMEcolcrt − filter nroff output for CRT previewing

SYNOPSIScolcrt [options] [file ...]

DESCRIPTIONcolcrt 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 lines.

OPTIONS, −−no−underlining Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1). −2, −−half−lines Causes 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 partially invisible. −h, −−help Display help text and exit. −V, −−version Print version and exit.

HISTORYThe colcrt command appeared in 3.0BSD.

BUGSShould fold underlines onto blanks even with the option so that a true underline character would show. Cant 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.

EXAMPLESA typical use of colcrt would be: tbl exum2.n | nroff −ms | colcrt − | more

SEE ALSOcol(1), more(1), nroff(1), troff(1), ul(1)

REPORTING BUGSFor bug reports, use the issue tracker at <https://github.com/util−linux/util−linux/issues>.

AVAILABILITYThe colcrt command is part of the util−linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util−linux/>.
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