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====== Connecting to a Linux computer using SSH from a Windows computer (text mode interface) ======

Open your web browser and navigate to the PuTTY client download website here:

[[http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html|PuTTY client download website]]

Click on "putty.exe" to download the PuTTY client to your download folder.

{{:services:remote-access:win_putty_step1.png|}}

Open your download folder and double-click **putty.exe**:

{{:services:remote-access:win_putty_step2.png|}}

Windows will pop up the following dialog to ask you whether you trust the application you just downloaded from the PuTTY website, click **Run**:

{{:services:remote-access:win_putty_step3.png|}}

The main window of the PuTTY client will open and show a dialog to configure a new session upon first start: 

{{:services:remote-access:win_putty_step4.png|}}

Use "Saved Sessions" to name this session for later reference, type the name of the computer you want to connect to into the field "Host Name (or IP address)" (login.physik.fu-berlin.de in this case), click **Save**:

{{:services:remote-access:win_putty_step5.png|}}

In the left hand side of the PuTTY window, click **Translation** below the item **Window** and make sure **Remote character set** is set to **UTF-8**, then click **Open** to make a connection:

{{:services:remote-access:win_putty_step6.png|}}

You will be asked whether you trust the remote host, click **Yes**. This dialog will be shown upon the first connection only:

{{:services:remote-access:win_putty_step7.png|}}

A terminal will open and ask for your username and password, your login should complete successfully:

{{:services:remote-access:win_putty_step8.png|}}

====== Connecting to a Linux computer using SSH from a Linux computer (text mode interface) ======

Many software applications on Linux are designed in a way that they can be used using a text mode interface only. This means, there is no graphical user interface which is operated with a mouse or a touchscreen but just a command prompt which takes single text commands which can be combined with options and parameters.

To connect to a remote computer running Linux through SSH from a computer running Linux, first navigate through your //Applications// menu, find the //System Tools// submenu and click //Mate Terminal//.

{{:services:remote-access:ssh_terminal_menu.png|}}

The terminal window should open similar to the following picture. To establish an SSH connection to a remote Linux computer at the department, type:

ssh **username**@**computer**.physik.fu-berlin.de

It is highly recommended to use the computer //login// since it is a machine guaranteed to be running 24/7 and has enough hardware ressources to be used by several users simualtanously for login.

Thus:

**ssh username@login.physik.fu-berlin.de**

{{:services:remote-access:ssh_terminal_window2.png|}}

The SSH command has some additional, useful options:

  * -x - disable X forwarding
  * -X - enable X forwarding (allows to run remote graphical applications); use together with -C
  * -C - enable compression; use this when enabling X forwarding

====== Connecting to a Linux computer using SSH from a Mac computer (text mode interface) ======

Any Mac computer running MacOS X brings everything you need to connect to a Linux computer using SSH. The //ssh// command is built in and can be run from the //Terminal// application.

First, open **Finder** and navigate to your //Applications// folder, look for the sub-folder //Utilities// and open it by double-click:

{{:services:remote-access:mac_ssh_terminal_1.png|}}

In the folder //Utilities//, search for the //Terminal// application and double-click it:

{{:services:remote-access:mac_ssh_terminal_2.png|}}

This should open a terminal window. In the terminal window, type:

ssh **username**@login.physik.fu-berlin.de, followed by pressing <ENTER> and your password and <ENTER>. If asked whether you want to trust the remote computer, type "yes" and press <ENTER>:

{{:services:remote-access:mac_ssh_terminal_3.png|}}

You're now logged in to the primary login computer at the Physics department.