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Re: [LUG] Unique system identifiers?

 

On Monday 31 March 2008 15:09, Martijn wrote:
> On Mon, Mar 31, 2008 at 2:35 PM, Grant Sewell wrote:
> >  Running 'ifconfig | grep "HWaddr"' (without the ' marks) gives me:
> >  eth1      Link encap:Ethernet  HWaddr 00:14:22:43:0D:FB
> >  How can I remove everything bar the 00:14:22:43:0D:FB ?
>
> ifconfig | grep "HWaddr" | cut -d' ' -f11
>
> This cuts your output into slices using a space as a delimiter (-d' ')
> and then outputs only the 11th slice (-f11). Which in this case gives
> you 00:14:22:43:0D:FB. Of course, it will fail to work if your output
> line might have more or less spaces before the MAC address. If this
> might happen -- I am not very familiar with ifconfig -- you might need
> to use a slightly more intelligent version of cut and/or put a sed in
> the pipeline.
Not likely for most but what about clusters etc where IP and MAC will be 
'copied' across several machines?
Tom te tom te tom


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