Setup ssh-agent, ​http://www.google.com/search?q=ssh-agent.

Load your ssh "root" keys:

jhoblitt@rma ~/.ssh $ ssh-add id_dsa_root_poi
Enter passphrase for id_dsa_root_poi: 
Identity added: id_dsa_root_poi (id_dsa_root_poi)

Login to po35.

jhoblitt@rma ~ $ ssh -A root@po35
Last login: Tue Aug 11 11:11:21 2009 from rma.ifa.hawaii.edu
po35 ~ #

cd to the config system root dir.

po35 ~ # cd config
po35 config #

Edit the /etc/mysql/my.cnf common to all db nodes:

po35 config # vi mhpcc/common-db/etc/mysql/my.cnf

po35 config # ./mountunion
po35 config # ./push ippdb0[12]
po35 config # ./mountunion -u