PuTTY
=====

PuTTY -  before we start SSH connection
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### Windows PuTTY Installer

We recommned you to download "**A Windows installer for everything except PuTTYtel**" with **Pageant** (SSH authentication agent) and **PuTTYgen** (PuTTY key generator) which is available [here](http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html)![external](../../../img/external.png).

!!! Note "Note"
	After installation you can proceed directly to private keys authentication using ["Putty"](putty#putty).
    "Change Password for Existing Private Key" is optional.
    "Generate a New Public/Private key pair" is intended for users without Public/Private key in the initial email containing login credentials.
    "Pageant" is optional.

### PuTTYgen

PuTTYgen is the PuTTY key generator. Read more how to load in an existing private key and change your passphrase or generate a new public/private key pair using [PuTTYgen](puttygen) if needed.

### Pageant SSH agent

[Pageant](pageant) holds your private key in memory without needing to retype a passphrase on every login. We recommend its usage.

PuTTY - how to connect to the IT4Innovations cluster
--------------------------------------------------------

-   Run PuTTY
-   Enter Host name and Save session fields with [Login address](../../../salomon/accessing-the-cluster/accessing-the-cluster/) and browse Connection - > SSH -> Auth menu. The *Host Name* input may be in the format **"username@clustername.it4i.cz"** so you don't have to type your login each time.In this example we will connect to the Salomon cluster using **"salomon.it4i.cz"**.

![](PuTTY_host_Salomon.png)

-   Category -> Connection - > SSH -> Auth:
    Select Attempt authentication using Pageant.
    Select Allow agent forwarding.
    Browse and select your [private key](ssh-keys/) file.

![](PuTTY_keyV.png)

-   Return to Session page and Save selected configuration with *Save* button.

![](PuTTY_save_Salomon.png)

-   Now you can log in using *Open* button.

![](PuTTY_open_Salomon.png)

-   Enter your username if the *Host Name* input is not in the format "username@salomon.it4i.cz".
-   Enter passphrase for selected [private key](ssh-keys/) file if Pageant **SSH authentication agent is not used.**

Another PuTTY Settings
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-   Category -> Windows -> Translation -> Remote character set and select **UTF-8**.
-   Category -> Terminal -> Features and select **Disable application keypad mode** (enable numpad)
-   Save your configuration on Session page in to Default Settings with *Save* button.