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Top Forums UNIX for Dummies Questions & Answers How to count lines - ignoring blank lines and commented lines Post 302118881 by matrixmadhan on Friday 25th of May 2007 01:21:05 AM
Old 05-25-2007
Quote:
#egrep -cv '#|^$' active_servers
this displayed the total but on screen only, not in the file
If you had rather need the output on file, redirect that.

Code:
egrep -cv '#|^$' active_servers > somefilename

 

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NNGRAB(1)						      General Commands Manual							 NNGRAB(1)

NAME
nngrab - news retrieval by keyword (nn) SYNOPSIS
nngrab [ -c ] keyword DESCRIPTION
nngrab invokes nn on all USENET articles whose subject (or keyword) field(s) contain an instance of keyword. nngrab is a fast equivalent for: nn -mxX -s/keyword all For example, nngrab tesla will retrieve items concerning Nikola Tesla. Keyword case is ignored unless -c is specified, and the keyword can be a regular expressions (escaped to avoid conflicts with the shell). For example, nngrab "n.*tesla" The range of search includes all newsgroups on the system, including ones which are unsubscribed. FILES
$db/subjects subject database SEE ALSO
nn(1), nnspew(8), egrep(1) NOTES
nngrab can be much faster than the equivalent command shown above, if the tertiary news subject database generated by the nnspew(8) daemon exists. To enable the faster operation, nnspew must be executed regularly by cron. nngrab uses egrep(1) to scan the subject database, so if you are not running fast egrep (GNU-style) this is all for naught. nngrab will use a subject database generated by nnspew independent of its age. Thus, if you stop running nnspew, remember to remove the subjects file as well. BUGS
Under version 6.4 onwards, search of the "Keywords:" field is not supported. Search on name is not possible either. AUTHOR
James A. Woods, NASA Ames Research Center E-mail: jaw@ames.arc.nasa.gov 4th Berkeley Distribution Release 6.6 NNGRAB(1)
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