Re: How to search and replace

Dan Track wrote:

On 2/2/06, Paul Howarth <paul@xxxxxxxxxxxx> wrote:

Dan Track wrote:

On 2/2/06, Paul Howarth <paul@xxxxxxxxxxxx> wrote:

Dan Track wrote:

Hi

I thought I'd ask this here as you guys helped me setup mrtg :)

I've got the following pattern in a text file in linux.
Target[description1].1.3.4.6.5.3.:string@xxxxxxxxxx
Directory[description1]: server1

Target[description2].1.3.4.6.4.9.:string@xxxxxxxxxx
Directory[description2]: server2

What I would like to do is replace the ip of each with the following
value of "Directory". So for example I would like
Target[description1].1.3.4.6.5.3.:string@xxxxxxxxxx to become
Target[description1].1.3.4.6.5.3.:string@xxxxxxxxxxxxxxxxxxx

How can I accomplish this using either C,perl,sed or awk

sed -e '$b
 /^Target\[[^]]*\][.0-9]*:.*@[0-9.]*$/ {
   $!N
   s/^\(Target\[[^]]*\][.0-9]*:.*@\)[0-9.]*\nDirectory\[[^]]*\]:
\(.*\)$/\1\2.example.com/
   P;D
 }' textfile > output

Thanks for the reply. When I run it I get the following error:

The long line starting with "s/" and ending with "example.com/" is a
single long line; make sure your mail client didn't add a newline.

Ok I tried that, it seem to have fixed the "s" problem. But now I get
the following:

sed -e '$b /^Target\[[^]]*\][.0-9]*:.*@[0-9.]*$/ {
$!N
s/^\(Target\[[^]]*\][.0-9]*:.*@\)[0-9.]*\nDirectory\[[^]]*\]:\(.*\)$/\1\2.example.com/
P;D
}' text_files/mrtg.cfg > text_files/mrtg.cfg.changed
sed: can't find label for jump to `/^Target\[[^]]*\][.0-9]*:.*@[0-9.]*$/'

Paul.