generate random mac address

2>/dev/null dd if=/dev/urandom bs=1 count=6 | od -t x1 | sed '2d;s/^0\+ //;s/ /:/g'

2
By: jianingy
2010-04-30 00:44:21

1 Alternatives + Submit Alt

What Others Think

Excellent!
buzzy · 421 weeks and 2 days ago
This may require some filtering. There are a few mask bits at the beginning such as the multicast bit. If you've ever tried changing a MAC address from "00:aa:bb:cc:dd:ee" to "01:aa:bb:cc:dd:ee", you may have noticed some devices like Cisco switches become unhappy. Probably better to leave the first byte set to "00" and just generate 5 random bytes.
mulad · 421 weeks and 1 day ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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