Cluster connection

Contents view

Logging in requires your workstation to meet standard requirements: a workstation with an up-to-date operating system and software, a local session with a login (non-administrator) and a strong password, and systematic locking or logging out of your session whenever you are away, even for a short time.

First login and OpenOnDemand login not working!

if the OpenOndemand connection does not workor for the first connection:
Establish an ssh connection first!
Your password may have expired: a password change request will be displayed.

OpenOnDemand allows to connect to “MatriCS 3.0” : login01 or login02

Graphic session with OpenOnDemand

  1. Login : login / password on OpenOnDemand
  2. Go to Visu Desktop of Interactive Apps menu
  3. You can change session duration and clic on Launch
  4. When your “job/task” is “running” state, clic on Launch Visu Desktop

Access via ssh

With a terminal under Linux or with Mac OS X Applications->Utilities->Terminal of MacOS X.
Under Windows :
1 – In a DOS terminal (cmd) provided you have installed the “ssh client” (Addition or remove programs -> Optional features -> OpenSSH client).
2 – Install mobaxterm “Home edition”
The connection is made by the following command: ssh mylogin@login.matrics.u- picardie.fr

Ssh connection via public key

This procedure also works in a local mobaxterm terminal under Windows.

Step 1: Create an ssh key on your machine

  • On your local machine, type the following command:
    ssh-keygen
    -> validate the default setting of “Enter file in which to save the key”
  • -> Enter a passphrase for added security. Without a passphrase, you will be able to connect from your terminal without a password.

Step 2: Adding the key to your MatriCS account

  • ssh-copy-id [Votre_login]@login.matrics.u-picardie.fr

Step 3: Verification

  • ssh [Your_login]@login.matrics.u-picardie.fr will ask for the passphrase if necessary (more secure) or if you have set one!

WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED

The server fingerprint may have changed! Let’s check if this is not an impersonation!

You received an error message when trying to connect!

ssh -X login@login.matrics.u-picardie.fr
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:FGBUgQgMWQ+WlLklzZULx5ygQkfLnpONlg8kPULZPMo.
Please contact your system administrator.
Add correct host key in /home/xxxxx/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/xxxxx/.ssh/known_hosts:106
remove with:
ssh-keygen -f '/home/xxxxx/.ssh/known_hosts' -R 'login.matrics.u-picardie.fr'
Host key for login.matrics.u-picardie.fr has changed and you have requested strict checking.
Host key verification failed.

You have an old SSH fingerprint for the servers on your system. Remove it using the following command:

ssh-keygen -R login.matrics.u-picardie.fr

Connect! Respond ‘yes’ only if the fingerprint is
DSA 1024 SHA256:M1R6R+TbbbDfa6eYDoQZgd3sBLw80ytmWHjsonu+nLs
ECDSA 256 SHA256:oHaCNmdSH8GjJrJUEn0VTJRN8Bdn65TPwyjTWfTAOwo
ED25519256 SHA256:lWDRVGHclNNH0pMfzrpfHG8Z71qejJ4rzxJj5UcoiS0
RSA SHA256:+0iYYyGI5rPUujDEdMEaeKbETlHdqj5xtxxgV6RCwcw

ssh -X votre_login@login.matrics.u-picardie.fr
The authenticity of host 'login.matrics.u-picardie.fr (194.57.107.35)' can't be established.
ED25519 key fingerprint is SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'login.matrics.u-picardie.fr' (ED25519) to the list of known hosts.
votre_login@login.matrics.u-picardie.fr's password: