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01-24-2008
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Help extracting MAC addresses from List
Hello all. 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: Code:
# $Creator: Network Stumbler Version 0.4.0 # $Format: wi-scan summary with extensions # Latitude Longitude ( SSID ) Type ( BSSID ) Time (GMT) [ SNR Sig Noise ] # ( Name ) Flags Channelbits BcnIntvl DataRate LastChannel # $DateGMT: 2008-01-16 N 0.0000000 E 0.0000000 ( belkin54g ) BSS ( 00:11:50:d7:c7:3c ) 16:44:39 (GMT) [ 19 68 49 ] # ( ) 0411 00000800 100 540 11 N 0.0000000 E 0.0000000 ( BUFVC Wireless ) BSS ( 00:03:93:ec:21:93 ) 16:44:39 (GMT) [ 33 82 49 ] # ( ) 0411 00000080 100 540 7 N 0.0000000 E 0.0000000 ( F-Wireless Zone ) BSS ( 00:19:e8:d8:c2:e0 ) 16:44:39 (GMT) [ 24 73 49 ] # ( ) 0421 00002000 100 540 13 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 Code:
00.11.50.d7.c7.3c 00.03.93.ec.21.93 00.19.e8.d8.c2.e0 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! Cheers |
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