On 2013-04-06 22:19, Thilo Six wrote:
> $ LC_ALL=C ifconfig -a | sed -ne
> "s/.*[[:space:]]HWaddr[[:space:]]\{1,\}\($re\)[[:space:]]*$/\1/p"
This one should work for you (if I guess your ifconfig -a output format
correctly) -- did you remember to define $re when testing it?
re='\([A-Fa-f0-9]\{2\}:\)\{5\}[A-Fa-f0-9]\{2\}'
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