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Full Discussion: grep throws in dashes?
Top Forums UNIX for Dummies Questions & Answers grep throws in dashes? Post 302115588 by kingdbag on Wednesday 25th of April 2007 06:34:06 PM
Old 04-25-2007
grep throws in dashes?

Hey guys,

I'm trying to grep for two things out of a file and I got that working but why is it randomly throwing "--" in the output? Is there a simple way to get rid of them? It only seems to do it when the line above what im looking for has numbers in it.

Code:
$ egrep -i -B 1 'port-name|description' in.txt
127.0.0.1
description
--
127.0.0.2
description
--
127.0.0.3
description
helpme
port-name
yay
port-name

 

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NRPORTS(5)						     Linux Programmer's Manual							NRPORTS(5)

NAME
nrports - NET/ROM port configuration file. DESCRIPTION
Nrports is an ASCII file that contains information about each of the NET/ROM ports that are to be used. When dealing with an NET/ROM util- ity such as call, it takes an optional argument that is the port name. This port name is a reference to the line within nrports, which has the same name. The information on each line contains enough information to bind the command to a particular NET/ROM interface, this binding is done by matching the callsign on the line in nrports with the callsign of the port set by ifconfig. The nrports file may contain comments that begin with a # in the first column, or a port description in the following format, each field being delimited by white space: name callsign alias paclen description The field descriptions are: name this is the unique NET/ROM port identifier. callsign the callsign of the NET/ROM interface to bind to. alias this is the alias of the NET/ROM port. paclen is the default packet size for this interface. description a free format description of this interface, this field extends to the end of the line. It may contain spaces. FILES
/etc/ax25/nrports SEE ALSO
call(1), netrom(4), ifconfig(8), nrparms(8). Linux 2 August 1996 NRPORTS(5)
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