Windows

Applications used in the tutorials below are free and can be downloaded from their respective websites:

• PuTTY and PuTTYgen
• WinSCP
• Xming

Accessing from within CARNET network or via parent institution's VPN

Connecting to teran

Connecting to teran can be easily done by using PuTTY:

• in the category Session, in the field Host Name (or IP address) it is required to fill-in the data with <username>@teran.srce.hr and to click Open
• after the terminal windows pops up, it is required to fill-in the password into the prompt.

Copying files

Copying from and to Isabella is made simple when you are using WinSCP

• in the Host name field you are required to fill in teran.srce.hr, and in the field Port number, you are required to enter 22,
• in User name and Password fields you are required to fill in your username and password and to click Login,
• parallel view of your local machine and the remote server will be displayed, inside which you can use the usual copy and paste.

Accessing outside CARNET network or w/o parent institution's VPN

Creating SSH keys

If you need to access Isabella cluster outside CARNET network, you have to create SSH keys and send us a request containing your public key at isabella@srce.hr. Request has to be sent from the email you used for user-registration.

In order to access the cluster outside CARNET network or when you are not using VPN of your parent institution, you are required to create SSH keys to access keybella, which will act as a tunnel towards teran. SSH keys are easily created by using PuTTYgen.

• when using default settings, click Generate,
• two keys will be created:
  • private key, with .ppk extension,
  • public key, without any extensions,
• in order to secure your key, enter a Key passphrase and confirm it in the Confirm passphrase field,
• click Save public key and Save private key to save them into a directory of your liking,
• email us a public key at isabella@srce.hr

Connecting to teran

First you are required to connect to keybella, which can be easily acomplished by using PuTTY:

• in the category Session, in the field Host Name (or IP address) you are required to enter <username>@keybella.srce.hr,
• in the category Connection→SSH→Auth, in the field Private key file for authentication, enter (or browse to) the path to your private key (.ppk).

After successfully connecting to keybella, you can connect to teran, from the same terminal, by entering the ssh command in the prompt:

ssh <username>@teran.srce.hr

... after which you are required to enter your password.

Copying files

First you are required to create a tunnel by using PuTTY:

• in the category Session, in the field Host Name (or IP address) you are required to enter <username>@keybella.srce.hr,
• in the category Connection→SSH→Auth, in the field Private key file for authentification, enter (or browse to) the path to your private key (.ppk),
• in the category Connection→SSH→Tunnels, in the field Source port enter 2222, and in the field Destination enter teran.srce.hr:22 and click Add,
• click Open.

After the connection is established, do not exit the terminal. Open WinSCP application:

• in the Host name field, enter 127.0.0.1, and in the Port number field, enter 2222,
• in User name and Password fields, you are required to enter your username and password and to click Login,
• parallel view of your local machine and the remote server will be displayed, inside which you can use the usual copy and paste.

Linux

Accessing from within CARNET network or via parent institution's VPN

Connecting to teran

Connecting to teran is simply accomplished by entering the ssh command into the terminal:

ssh <username>@teran.srce.hr

... after which you are required to enter your password.

Copying files

Local machine → Isabella

Copying files from your local machine to Isabella is accomplished by using the scp command:

scp <local-path>/<file> <username>@teran.srce.hr:<remote-path>

... after which you are required to enter your password.

Isabella → local machine

Copying files from Isabella to your local machine is accomplished by using the scp command:

scp <username>@teran.srce.hr:<remote-path>/<file> <local-path>

... after which you are required to enter your password.

Using graphical user interface

Connecting to teran with the option to use graphical user interface is accomplished by entering the ssh command into the terminal and by forwarding X11:

ssh -X <username>@teran.srce.hr

After the connection is established, you can test the connection by entering the command:

xterm

Accessing outside CARNET network or w/o parent institution's VPN

Creation of SSH keys

If you need to access Isabella cluster outside CARNET network, you have to create SSH keys and send us a request containing your public key at isabella@srce.hr. Request has to be sent from the email you used for user-registration.

In order to access the cluster outside CARNET network or when you are not using VPN of your parent institution, you are required to create SSH keys to access keybella, which will act as a tunnel towards teran.

SSH keys are created by simply entering the command into the terminal:

ssh-keygen

• when using default settings, private ( id_rsa ) and public ( id_rsa.pub ) keys will be stored in the ~/.ssh director,
• you have to email us your public key ( id_rsa.pub ) at isabella@srce.hr

Connecting to teran

First you are required to connect to keybella:

ssh -i ~/.ssh/id_rsa <username>@keybella.srce.hr

After the successful connection to keybella has been established, you can connect to teran, from the same terminal:

ssh <username>@teran.srce.hr

... and enter your password.

Copying files

Local machine → Isabella

In the first terminal window, you are required to create a tunnel towards keybella. It is important to keep this terminal window open.

ssh -NL 2222:teran.srce.hr:22 -i ~/.ssh/id_rsa <username>@keybella.srce.hr

Copying files to teran is executed in another terminal window:

scp -P 2222 <local-path>/<file> <username>@localhost:<remote-path>

Isabella → Local machine

In the first terminal window, you are required to create a tunnel towards keybella. It is important to keep this terminal window open.

ssh -NL 2222:teran.srce.hr:22 -i ~/.ssh/id_rsa <username>@keybella.srce.hr

Copying files from teran is executed in another terminal window:

scp -P 2222 <username>@localhost:<remote-path>/<file> <local-path>