On Thu, 28 Feb 2008, Wojtek Pilorz wrote:
On Thu, Feb 28, 2008 at 08:13:17AM -0600, Les Mikesell wrote:
Jerry Geis wrote:
I am trying to grab the mac address for eth0 on centos 5.1 with
ifconfig | grep eth0 | cut -d ' ' -f 5 and I dont get anything.
What am I not doing right?
ifconfig | grep eth0 | cut -d ' ' -f 1 gives me eth0 but anything
else like -f 2, -f 3 etc I get nothing.
If sed had been invented first, we wouldn't need grep.
ifconfig |sed -n -e 's/eth0.*\(..:..:..:..:..:..\)/\1/p'
Or awk! :-) And you can ditch ifconfig entirely and use /sbin/ip,
which defaults to a lower-case version of the MAC rather than the
upper-case presentation used by ifconfig:
ip link show eth0 | awk '/ether/ {print $2}'
I mean, doesn't everyone use lower-case MACs in dhcpd.conf? :-)
--
Paul Heinlein <> heinlein@xxxxxxxxxx <> http://www.madboa.com/
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