Cluster Login (First Time) - nthu-ioa/cluster GitHub Wiki

Welcome to the CICA cluster!

To connect to the cluster for the first time:

  1. Fill in this google form to request an account, and send and email to [email protected] to let us know that you have filled it in. We will then send you a temporary password.

Please tell us what username you prefer. You are free to choose. 4-8 latin characters is standard. If you have no preference, we suggest your initials followed by your surname (e.g. apcooper, kcpan). We suggest something fast to type (you will have to type it a lot) and sensible (it will be visible to everyone). You may want to choose the same username that you use regularly on another system.

  1. In a terminal on your local machine, run ssh [email protected]

You should see this screen:

  ______                    _ _                 _
  |  ___|                  | | |               | |
  | |_ ___  _ __ ___   __ _| | |__   __ _ _   _| |_
  |  _/ _ \| '_ ` _ \ / _` | | '_ \ / _` | | | | __|
  | || (_) | | | | | | (_| | | | | | (_| | |_| | |_
  \_| \___/|_| |_| |_|\__,_|_|_| |_|\__,_|\__,_|\__|

      ------------------------------------------

         Institute of Astronomy, NTHU, Taiwan

    -------------------------------------------------
    Unauthorized access to this machine is prohibited
    Press <Ctrl-D> if you are not an authorized user
    -------------------------------------------------
  1. Type your temporary password now
  2. Follow the instructions to set a new password, following the guidelines below. If you are not automatically asked for a new password, please use the command yppasswd to change it.
  3. Enjoy coding! You can follow this guide for more tips on logging in to the cluster quickly and securely.

Password Guidelines

Important

We now enforce a strict password policy. The following rules apply.

  • Minimum 8 characters
  • Including at least one digit, lowercase letter, uppercase letter, and symbol (!@#$ etc.)
  • Not containing your username
  • Not containing common English dictionary words
  • Not containing more than 3 of the same character in a row (111 etc.)
  • If you are changing your password, you cannot re-use your last 3 passwords.

Tip

To protect against brute-force password attacks, your IP address will be temporarily banned if you type the wrong password 5 times in a short period when connecting with ssh. This ban will last for about 15 minutes, so just wait, then try again. If your IP address is banned twice on the same day, the second ban will last much longer. If this happens, contact an administrator.

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