how to count IPs in use

[Peter Laws]

David W. Hankins wrote:

> dhcpstatus is cool but when I'm in CLI, I often just "Control-R" and
> find this in my bash history;
> 
>   awk '/^lease / { curlease = $2; } /^  binding state/ { lstates[curlease] = $3; } END { for (curl in lstates) { tstates[lstates[curl]]++; } for (curs in tstates) { print curs, tstates[curs]; } }' /var/db/dhcpd.leases
> 
> It prints output like;
> 
>   active; 48
>   free; 81
>   backup; 158
> 
> Which is useful to me as a spot-check.


Very nice!  One of my servers serves many networks and I'm really only 
concerned about one of them.  Adding the first three octets of the IP 
address to "^lease " didn't seem to do the trick ... pointers?

Other than to the O'Reilly sed and awk book, I mean.  :-)

-- 
Peter Laws / N5UWY
National Weather Center / Network Operations Center
University of Oklahoma Information Technology
plaws at ou.edu
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