login_shell [ClimXtreme]

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==== Log in via shell =====

XCES is hosted at DKRZ's HPC, in order to navigate through folders, edit scripts/programs or run them we generally need to connect to the HPC nodes via ssh. Here we indicate the most common ways to do it:

\\

=== 1.via linux/mac ===

We only need to open a terminal and type:

<code bash>
$ ssh <username>@levante.dkrz.de
</code>

add ''%%--%%X'' for linux and ''%%--%%Y'' for mac if you want to able to launch some GUI (e.g. ''ncview'') within the shell via X11.

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=== 2. via windows ===

Here we can do it either 

== 2.a via powershell ==

just launch the powershell and type:

<code bash>
$ ssh <username>@levante.dkrz.de
</code>

== 2.b via PuTTY ==

Download it from [[https://www.putty.org/|here]]. Open it and under the ''Session tab'' enter the following:

  - hostname: ''levante.dkrz.de''
  - port: ''22'' (for ssh)
  - click ''open''

{{ :public:putty2modi-01.png?nolink&500 |}}

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== 2.c others ==

For example since some years you can install [[https://docs.microsoft.com/en-us/windows/wsl/install-manual|Windows Subsystem for Linux]]. From there you can launch it, and use the terminal to connect the same way. If you fancy some particular terminal such as ''terminator'' follow this [[https://blog.cyplo.dev/posts/2016/07/06/terminal-emulator-windows-10/|link]].

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=== 3. via Jupyterhub ===

DKRZ's Jupyterhub (For info on how to connect to Jupyterhub, please [[connec2jupyterhub|click here]]) also offers the possibility to open a terminal within it:

  * If we open a __Preset__ session clicking //New/Other/Terminal//: \\

{{ :public:terminal-jupyter.gif?nolink|}} 

  * If we load //Jupyterlab//, directly from the //Launcher// panel or clicking //File/New/Other/Terminal//: \\
{{ :public:adv_choices.png?nolink |}}