Connection and working environment

How to connect to Azzurra

Your credentials are sent to you by e-mail.

To change your password, use the command passwd, once logged in. For security reasons, please use a password with at least 12 characters.

If you forgot your password, please contact us.

You can connect from your office (provided that you send us your institutional IP address) or remotely via a VPN whose name is given in the e-mail including your credentials.

From your office at the university, on the wired network

To connect, you must have an ssh client on your machine:

  • For Windows, you can use PuTTY and enter as hostname, the machine name you received by e-mail and port: 22 (SSH). Then, enter your Azzurra credentials in the new terminal.
  • For Linux and Unix-like (MacOS), you can use the native client provided with the OS and use the following command: ssh user_name@machine_name (replace by the appropriate values, received by e-mail)

VPN

To connect to Azzurra via VPN, you must use the AnyConnect client, that you can download on this link and specify the correct VPN name: @hpc.

To connect to the VPN, enter in the AnyConnect client: open.unice.fr

Then, in the « Username » field, type in your unice username followed by @hpc and in the Password field, type in your unice password:

Important: use your unice credentials in order to connect to the VPN, not your Azzurra credentials.

Once the VPN connection is established, open a terminal (if you use Linux or Mac) and enter: ssh my_azzurra_login@machine_name (replace by the appropriate values, received by e-mail).

Then, enter the password that was sent to you by e-mail.

If you’re under Windows, you can use PuTTY and enter as hostname, the machine name you received by e-mail and port: 22 (SSH). Then, enter your Azzurra credentials in the new terminal.

Your working environment

The cluster is currently running on CentOS 7.7. The essential Linux commands can been seen by clicking here.

Each user has, in addition to their folder in /home, their own workspace, accessible in /workspace/<username>

  • /home: do not store large files in your /home directory. You can use it to store, for example, the input files you use to start your calculations and the output files summarizing the results.
  • /workspace: larger, it allows computing nodes to generate or work with potentially very large files (terabytes). It is therefore the place where it is advisable to store your checkpoint files.

Users of the same group are also granted access to a shared directory into /workspace/group_name. To know which group(s) you belong to, use the groups command.

Important: the center does not make any backup of your data.

Two text editors are available on the cluster: nano and vim.

Transfer files from your computer

Using FileZilla

To transfer your files from your computer to Azzurra, you can use FileZilla: https://filezilla-project.org/download.php?type=client

Once FileZilla is installed, make sure you are connected to an authorized network (your office’s or the dedicated VPN) and fill in the fields in FileZilla as follows:

Host: the machine name that was sent to you by e-mail
Username: the username that was sent to you by e-mail
Password: your Azzurra password
Port: 22

Using rsync

rsync is a standard command line tool on Linux. In particular, it allows incremental synchronization, which is practical for transferring large data, and uses a protocol other than FTP / SFTP. See more information on this link.

Here is an example of use. From your personal computer, enter the following command:

rsync -a --progress my_local_directory/ username_azzurra@machine_name_azzurra:path_to_your_azzurra_directory/