How to change your GSI Linux (Kerberos) password
For the impatient
- Obtain a Linux command line (eg. on a
- You will be prompted for your current Kerberos password and for your new password (twice)
Step 1: Access to the command line ...
... from Linux
If you are working on any GSI Linux
machine (hostname begins with
) with a graphical user interface you only have to open a command line window (terminal
for KDE or
. The corresponding button in the KDE panel looks like a monitor, simply click on this icon.
... from Windows
If you are working with Windows
you'll have to open a session to a Linux machine via ssh
using a Secure Shell Client
. The following screenshots show the usage of
To start a connection you'll have to enter
as the "Host Name", then click on the button
. In the console window you can enter your Linux account name and your actual (i.e. old) UNIX/Linux password (see screenshot for Step 2
Step 1.5: Accepting the server key
If you are connecting to a ssh server for the first time
you'll have to accept its ssh key. To ensure that the target belongs to the host group
you may compare its fingerprint with the value on this page
, then click
or any corresponding button of your Windows client. For Linux clients you'll have to type
and hit [Return].
Step 2: Change your password on a Linux-machine
Use the command passwd
There are password conditions on these machines:
- At least 10 characters
- At least 3 of the following 4 character classes:
- English uppercase characters (A through Z)
- English lowercase characters (a through z)
- Base 10 digits (0 through 9)
- Nonalphanumeric characters (e.g., !, $, #, %)
Step 3: Close the session
Don't forget to close the command line session after finishing your work. You can logout by typing
and pressing [Return]. In case of remote sessions the network connection is terminated also.
Q: I've forgotten my old UNIX/Linux password, how can I reset it?
A: Please contact the UserHelpDesk
(SB3 1.247, -2515).
Q: My proposed new password isn't accepted, why that?
A: You have to fulfil the password-rules stated in Step 2
Q: How can I create a "strong" password?
A: Have a look at this website