DCache access from Chicago Batch Que

You need to set the environmental variable KRB5CCNAME to a file on NFS
that you want your tickets to be stored when you create the ticket and
inside the batch job.

example (sh-centric):
	export K5B5CCNAME=/home/cdf/jrlilly/.ssh/kerberos

You then need to get an address-less ticket, allow the ticket to be
renewed (as Un-ki related, the max ticket lifetime is set to 26 hours
by CDF), make it forward-able, set the ticket life to one day, 
and extend the renewable time (the example sets it to 7 days).

example:
	kinit -A -f -r 7d -l 1d

kinit -R can only run will the ticket is still valid, so you need a
cron'd job to automatically renew your ticket.  I'm using a script to
run the renewing for me:

env KRB5CCNAME=/home/cdf/jrlilly/.ssh/kerberos /usr/kerberos/bin/kinit
-R
env KRB5CCNAME=/home/cdf/jrlilly/.ssh/kerberos /usr/kerberos/bin/klist

The second line is simply so I get an email when my principal is
renewed successfully.  This script is saved in ~jrlilly/bin/krenew and
set to chmod 744.

Using crontab -e I have the following crontab entry:

0 12 * * * /home/cdf/jrlilly/bin/krenew