The outside world knows Louhi as louhi.csc.fi. The short alias name louhi can be used inside the domain csc.fi. When logging into Louhi, you will actually get connected to one of the six login nodes. These nodes provide the usual system services needed for program development and the preparation of the production runs, e.g., the compilers. You will get connected to login node which has the lowest load at the login moment.
The full internal name of a login node is louhi-loginX where X is a number from 1 to 8.
To log in you normally have to first access a local workstation (at your university or some other site on the Internet) and then use an SSH program to connect to the Louhi (louhi.csc.fi):
If your user id on Louhi is different from your user id on the local computer, you must give your user id on Louhi as option to the ssh command, e.g.,
ssh louhi.csc.fi -l user_id
Your password on Louhi will then be asked.
After displaying the prompt, Louhi is ready to execute your commands.
An SSH program must be used to connect to Louhi as well as to all the other CSC systems, because SSH creates a secure connection ensuring proper authentication and user and data privacy.
Academic users can obtain a freeware version of SSH from the www site
It is recommend to download the latest version. There are also plenty of free versions of SSH, for example OpenSSH (Unix) and TeraTerm SSH (Windows). These and other alternatives to SSH can be obtained from
If you are using an X terminal or an X server program, you can establish an X Window System connection to the Louhi directly. An X Window System connection to the Louhi through an SSH connection running in local xterm is established by typing:
localhost% xterm -e ssh louhi.csc.fi
The encrypted SSH connection takes care of all the necessary environment settings.