Hello all, I have two files, one is a list of computer names and IP addresses: 
10.1.3.1:frank
10.1.3.2:john
10.1.3.3:mis23455
...

[download]
And the other file looks like this (DJB data file): 
...
+host-1-3-1-10:10.1.3.1
+host-2-3-1-10:10.1.3.2
+host-3-3-1-10:10.1.3.3
...

[download]
I want to take the first file, loaded with ip:machinename, and search the second file based on the IP address. Then, I want to replace the +host-* part with the proper machine name for that IP address. The finished data file (file 2) would look like this: 
...
+frank:10.1.3.1
+john:10.1.3.2
+mis23455:10.1.3.3
...

[download]
In other words, I want to use the data in the first file to search and replace data in the second. The data file is 130000+ lines long. What would be the best way process such a large file? I'm quite stuck at this point so any help would be useful.
Thanks.

In reply to Search and replace on a 130000+ line file. by brendonc

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