To avoid being asked for your password all the times when running MPI programs, connect to a local machine in 48/419, open a shell and type the following commands (without explanations in brackets):

ssh-keygen -t dsa (you can enter a passphrase for more security)
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
chmod 755 $HOME
chmod 755 ~/.ssh
chmod 644 ~/.ssh/authorized_keys

(if you have entered a non-empty passphrase, call
ssh-add
once and enter your passphrase)
If you are still asked for your password when running MPI programs, send an email to junk@mathematik.uni-kl.de 

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