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Login to the Pelle console environment with a password

There are multiple ways to log in to Pelle. This page describes how to do so using a terminal and a password.

If you want to get rid of using a password every time, see login to the Pelle console environment with an SSH key.

Procedure

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1. Use ssh to log in

From a terminal, use ssh to log in:

ssh [username]@pelle.uppmax.uu.se

[username] is your UPPMAX username, for example, sven, resulting in:

ssh sven@pelle.uppmax.uu.se

Using this login, graphics (i.e. images) on Pelle cannot be displayed.

How does this look like the first time? 
sven@svens_computer:~$ ssh -X sven@pelle.uppmax.uu.se
The authenticity of host 'pelle.uppmax.uu.se (89.44.250.8<X>)' can't be established.
ECDSA key fingerprint is SHA256:W/MazH3WrH0wKrHBOJpPbDaU4qeYGqiv3FRPsdXIsb4.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])?

  • Type yes!

  • Other valid fingerprints are:

    • SHA256:y241gg8SExSktACnpD+OvROrMPTJcXYYdT/zYReef+k
    • SHA256:hkhuV+0mUDL7N4Jpr8/OWInrORSAL5ZRpvAqfjyg7Jg
How can I display graphics on Pelle?

To display graphics (i.e. images) on Pelle, use -X:

ssh -X username@pelle.uppmax.uu.se

This option enable so-called X forwarding, which allows you to run programs that require light graphics, such as eog to display an image.

Why no -A?

On Pelle, one can use -A:

ssh -A username@pelle.uppmax.uu.se

This option is only useful when you want to log in to Pelle via the console using an SSH key. As we here use passwords (i.e. no SSH keys) to access Pelle, -A is unused and hence we simplify this documentation by omitting it.

2. Type your UPPMAX password

Type your UPPMAX password and press enter. You will see no asterisks to indicate how many characters you've typed in.

If you are outside the university networks you will be asked for your UPPMAX 2-factor authentication number.

3. You are in

Enjoy! You are in! Or, to be precise, you are in your home folder on a Pelle login node.

How to behave on a login node

On a login node, one can and should do simple things only: it is a resource shared with all other users on that node.

If you need to do more intense calculations, use the Slurm job scheduler.

If you need to do more intense calculations interactively, use an interactive session.