I have a large number of text files outputted from various Netstumbler Wireless Scans; from which I need to extract the MAC addresses of the various Access Points.
The Text files look like this:
What I would like to do is extract the MAC addresses into another text file so that it ends up looking like this:
FINAL TEXT FILE
I'm pretty new at this whole scripting thing, but I've managed to work our a couple of steps of this process.
1) I can use grep 'N 0.0' to get just the lines with MAC addresses
2) I can probably use tr -d to delete the () around the MAC addresses
What I'm failing to be able to do is basically everything else
1) how do I get just the MAC addresses out of that long line?
2) how do I swap the ":" separating the parts of the MAC addresses for "." ?
I realise this is probably fairly straight forward, and I've tried looking in the various man pages for the likes of awk, sed and grep, but to be honest they are a little confusing.
Any help getting my Wireless Scan text file to look like my hoped for Final text file would be greatly appreciated!
Initially it didn't work, and returned "command not found" but after a little research I realised that nawk is just "new awk" so subtituted awk, and it worked. (I don't think OS X has nawk installed)
Thank you very much.
Secondary question, if you have time, could you explain how it's working...
What are the various parts of that command doing? It would help me in the future to understand what is going on.
Interesting. I really like that way of doing it actually. And as you say, could be useful if NetStumbler changes their output format.
If anyone is interested, here is the finished script.
I'm sure there is a neater way to do it, without the intermediate files, but as I'm fairly new at this scripting, and just wanted the job done, I went with the way I was sure I could do it.
Hy over there,
Lets make it simple :)
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