How to search and replace

[Charles Curley]

On Thu, Feb 02, 2006 at 03:20:42PM +0000, 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 at 10.11.8.10
> Directory[description1]: server1
> 
> Target[description2].1.3.4.6.4.9.:string at 10.17.5.24
> 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 at 10.11.8.10 to become
> Target[description1].1.3.4.6.5.3.:string at server1.example.com
> 
> How can I accomplish this using either C,perl,sed or awk

If this is an ongoing issue, I'd check the documentation for the
originating program and see if there's an option to do reverse lookup
on the IP addresses.

Failing that, I'd a perl script to detect the IP addresses, do the
lookup, then substitute the domain name for the IP address.

-- 

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