Mailinglist Archive: opensuse (2800 mails)

[Jan Karjalainen <jrock@xxxxxxx>]

Randall R Schulz wrote:
> Jan,
>
> On Wednesday 07 February 2007 15:30, Jan Karjalainen wrote:
>   
> > ...
> >     
> > > On Wednesday 07 February 2007 15:19, Jan Karjalainen wrote:
> > >       
> > > > I'm trying to parse through a file and delete all the lines with
> > > > the word "LOG" on it, eg. replace it with "".
> > > >         
> > > ...
> > >       
> > I found the expression:  .+LOG.+
> >     
>
> You're still making it too complicated for programs such as ed, vi, 
> grep, egrep or sed, patterns are not required to match the whole line. 
> That means the ".+" parts are redundant. If you really want to exclude 
> from treatment those lines where "LOG" occurs at the beginning or end, 
> then use the pattern ".LOG." (sans quotes, of course).
>
> Under some circumstances regular expression efficiency matters little, 
> but given the size to which log files can grow, more efficient regular 
> expressions are worth using.
>
> So here's what you want to do:
>
> % sed -e '/LOG/d' originalLogFile >filteredLogFile
>
> If you really want to exclude those lines where LOG occurs at the 
> beginning or end, then use this:
>
> % sed -e '/.LOG./d' originalLogFile >filteredLogFile
>
>
> Randall Schulz
>   
The word LOG appears somewhere 2/3 in the line...

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