How to Grab MAC Address of Active Ethernet Connection in Bash Script?
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by Huy Tran
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Published on 2010-04-21T22:47:55Z
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2010/04/21
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bash
Simple Question:
How do I grab the MAC address of the active Ethernet connection in a bash script?
I currently have:
set - `/sbin/ifconfig eth0 | head -1`
MAC=$5
Which outputs the MAC address of the eth0, but if it's eth1 that's active, I want that instead.
Could I beforehand execute ifconfig | grep inet but that wouldn't tell me which interface is active, just that one is active. I need to grab the line above it to tell me which one is the active connection.
Any help would be much appreciated.
Thank you!
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