Logging in (with an SSH client)

Logging in (with an SSH client)

Caution

Login to UBELIX is only possible from within the UniBE network. If you want to connect from outside, you must first establish a VPN connection. For VPN profiles and instructions see the official tutorial.

First time login:

Info

For first-time login, you must create your account by visiting the Web UI at least once. SSH login will only be available after you have done this. Please see logging in to the webui for a full guide.

Once you have created your account, come back to this guide.

Connect using ssh:

From a terminal (all OS)

Connecting to UBELIX via the command line is possible from all major OS. Once you have activated your account for UBELIX you can connect using an ssh client:

bash

$ ssh <user>@submit02.unibe.ch

where you need to replace <username> with your own Campus Account username.

When you connect for the first time, you will also be asked to check the host key fingerprint of the system and need to type yes in order to accept it. The fingerprints of the UBELIX login nodes are listed in the table below. Please make sure that the host key fingerprint matches one of these.

At the password prompt enter your Campus Account password:

bash

$ ssh <user>@submit03.unibe.ch
Password:

Tip

Usually there is no indication of typing when entering your password (not even asterisks or bullets). That’s intended. Just enter your password and press ‘enter’.

After log in successfully you will see the welcome message and the command prompt:

bash

Rocky 9.6 Blue Onyx

FQDN:      submit03.hpc.unibe.ch
Processor: 128x AMD EPYC 7742 64-Core Processor
Kernel:    5.14.0-570.49.1.el9_6.x86_64
Memory:    128.223 GB

[user@submit03 ~]$

With MobaXTerm (Windows)

MobaXterm combines Terminal sessions with file transfer (scp/ftp) and X Window Server. There are many more features which are not described here. MobaXterm can be downloaded on the MobaXterm Website. There are two versions, portable and installation. You can choose either one.

After installing and starting MobaXterm, a SSH session need to be configured:

• Click ‘Session’ in the top left corner:

• In “SSH” tab:

  • Set the remote host to a login node, e.g. submit01.unibe.ch
  • Enable the “Specify username” option and put your Campus Account short name in the corresponding box (here user ms20e149 will be used)

• In the “Advanced SSH settings”

  • Set SSH-browser type to ‘SCP (enhanced speed)’
  • Optionally, tick the ‘Follow SSH path’ button

• From now one the settings are stored and you can access the session on the left at the star icon

• MobaXterm will ask you to store the Password and manage a MasterPassword.

After starting the session, you should see the UBELIX login message and prompt. On the left hand side a File browser is located. There the UBELIX file system can be browsed and files up or downloaded, e.g. using drag and drop or the context menue.

Login nodes

There are four login nodes in UBELIX:

• submit01.unibe.ch
• submit02.unibe.ch
• submit03.unibe.ch
• submit04.unibe.ch

To access UBELIX, you can choose any one. If the load on a login node is high, you can log out and pick another one.

Host key fingerprints

| Host | Fingerprint | |--------- —|----------------------------------------------------------| | submit01.unibe.ch | SHA256:ScUNCxSnHzfxeLIVB8WY98EvKoVhBujbz6RXaSOw1VA (RSA)
SHA256:qmMfIbwyosfLUsY8BMCTgj6HjQ3Im6bAdhCWK9nSiDs (ED25519) | | submit02.unibe.ch | SHA256:eRTZGWp2bvlEbl8O1pigcONsFZAVKT+hp+5lSQ8lq/A (ED25519)
SHA256:Q4M+Tv3XsAuFLPdv2t/x3X3QY3IDsKMbNBwFcLoQeS8 (RSA) | | submit03.unibe.ch | SHA256:IYp6P61TybgGdbBd4w9+bQpIk8Yc3XfYLHG0CslCs6Y (RSA)
SHA256:PUkldwWf86h26PSFHCkEGKsrYlXv668LeSnbHBrMoCQ (ED25519) | | submit04.unibe.ch | SHA256:+maM19oNjmc6wyHyQSq1eqNtFKPPrEs+fdQm5maZyN8 (RSA)
SHA256:D3cmfXkb40P7W935J2Un8sBUd4Sv2MNLkvz9isJOnu0 (ED25519) |

Troubleshooting

If you have trouble connecting to UBELIX, you can run the SSH client with verbose output enabled to get more information about what happens when you try to connect:

bash

ssh -vvv <username>@submit02.unibe.ch

If you are unable to connect, and you contact the UBELIX support , we recommend that you provide the output of this command as part of your support request. Please include the output as text (copy from terminal, paste into support request), not as pictures.