Changing login shell to bash

If you wish to run VASP under condor on the NNIN/C cluster, as of this writing (11/09/07) you will have to make your login shell bash if it is not already. To do this on the NNIN/C cluster, you will actually have to go through the general SEAS (formerly DEAS) login node, which is running a network system password utility called yppasswd. If you are interested in the function of this utility, you can do a “man yppasswd” or a “man ypchsh” (similar command) for some details. This explanation is meant to be self-contained, however and no external references will be necessary.

First, login to the deas grid. If you have an NNIN/C account you should be able to access the deas login node via

ssh login.deas.harvard.edu.

You should execute the command

ypchsh                    ! (this is equivalent to “yppasswd –l”)

this will then invoke yppasswd (without the “-l” switch it is just a password untility) and ask you for your network password. This is just your usual login password for NNIN/C machines. When you enter your password, ypchsh will ask you which login shell you want. At the prompt, please enter “/bin/bash”. Then when you login to NNIN/C (ssh nnin-login.seas.harvard.edu) you will see, by doing either “echo $0” or `env | grep “SHELL” ` that your login shell is bash.