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Top Forums Shell Programming and Scripting Print certain lines based on condition Post 302844007 by Scrutinizer on Friday 16th of August 2013 05:30:06 AM
Old 08-16-2013
@ckwan
My suggestion would only work if the format is like in your sample (10 fields in the header) and if there are no additional space characters on empty lines (i.e. two consecutive newlines), which is usually the case with output from utilities. If that is not the case then a solution like Don's would work more reliably...
 
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colcrt(1)						      General Commands Manual							 colcrt(1)

Name
       colcrt - filter nroff output for CRT previewing

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

Description
       The  command 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
       -  Suppresses all underlining.  It is especially useful for previewing allboxed tables from

       -2 Causes half-lines to be printed, 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 would be:
       tbl exum2.n | nroff -ms | colcrt - | more

Restrictions
       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.

See Also
       col(1), more(1), nroff(1), ul(1)

																	 colcrt(1)

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