Connecting from outside

By Connecting from outside we mean that you are physically outside the Observatoire de Sauverny.

If however, you are physically in the Cubotron building at EPFL, you can login on the sunray terminals. You will then be automatically inside the Observatory network.

• The best tool to connect from outside is to use the nx tool, which gives you access to a full desktop. See the link Connecting with NX for more information.

• You can also use use ssh. With this latter, you can reach the observatory through two gates, login01.astro.unige.ch and login01.astro.unige.ch. To do so, use the following command:

  ssh -XY  your_username@login01.astro.unige.ch
  

  What is -X ?

  • The -X “enables X11 forwarding”. In other words, it allows the transfer of “X-windows”, that is any graphical user interfaces, like matplotlib graphs, ds9, nedit, etc
  • In case of trouble, try also -Y, or even both, i.e. -XY
  • If you do not plan to use any graphical user interface, you do not need this.

  Warning

  The first time you connect to a computer, it will ask you if you agree to place the computers key into a trusted keys list. Answer yes. If this key changes, connection will be refused. In this case, edit ~/.ssh/known_hosts and remove the offending line from this file