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Top Forums Shell Programming and Scripting UNIX compare, sort lines and append difference Post 302843482 by RudiC on Tuesday 13th of August 2013 12:36:51 PM
Old 08-13-2013
Is it always two consecutive lines, or, like in your a, b, 1|4|5 example, can the lines be spread over the file?
 

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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
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 lines. Available options: - Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1). -2 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 invisible. 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. Can't 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. BSD
June 30, 1993 BSD
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