[ale] Reverse of the 'cut' program

[Lightner, Jeff]

Just to tie it together since OP indicated the "grep -v" worked.   There is a difference beween "grep" and "egrep" (a/k/a grep -E in some UNIX flavors):

"grep -v  <pattern>" lets you exclude a SINGLE pattern.

"egrep -v "<pattern1>|<pattern2>|<etc...>" excludes each pattern defined where the pipe symbol means "or".

"grep -v google.com" works to exclude google.com.
"grep -v "yahoo.com" works to exclude yahoo.com.

egrep -v "google.com|yahoo.com" excludes both.

Also FYI:   -vi instead of just -v will exclude without case sensitivity. 
"grep -vi google.com" excludes "google.com", "GOOGLE.COM", gOoGlE.cOm, etc... whereas without the -i it would exclude only the case you specified.



-----Original Message-----
From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of DJ-Pfulio
Sent: Tuesday, February 10, 2015 5:07 PM
To: Atlanta Linux Enthusiasts
Subject: Re: [ale] Reverse of the 'cut' program

egrep -v 'regex1|regex2|regex3' ....

Or you can pipe the output through egrep -v a few times to remove more and more lines.

Sure, you can use a scripting language, but why?  BTW - I'd use perl. ;)

On 02/10/2015 02:22 PM, Pete Hardie wrote:
> grep -v <exclude pattern>
> 
> On Tue, Feb 10, 2015 at 2:16 PM, Justin Goldberg <justgold79 at gmail.com 
> <mailto:justgold79 at gmail.com>> wrote:
> 
>     I am trying to parse a log file and exclude the lines that contain any one
>     of a few different strings, for example "don't show ones that contain
>     google.com <http://google.com> or ones that yahoo.com <http://yahoo.com>"
>     for example.
> 
>     I'm guessing that sed or awk would fit this purpose.
> 
>     I looked on the web but didn't find any examples that made sense to this
>     Linux newbie.
> 
>     Any replies or pointers will be greatly appreciated!
> 
> 


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