In Ubuntu, kinit and ssh are in the packages heimdal-clients and openssh-client. The package heimdal-clients-x contains some extra applications that might come handy in the future. Install these packages with your favorite package manager or by executing:
sudo apt-get install heimdal-clients sudo apt-get install openssh-client
The openssh-client package was probably already installed. On centrally managed Ubuntu/Linux computers at KTH, the heimdal-client package is typically also installed.
Update the /etc/krb5.conf file according to these instructions.
Create or modify the file ~/.ssh/config according to these instructions.
Get tickets and login
Follow the instructions under the heading "Using your Kerberos tickets to login at PDC" on this page.
How to transfer files
To transfer files to and from PDC there are several methods available. We recommend using an AFS client or scp.