Added interactive-jobs.md and linux/macos/windows client recipes

pages/merlin6/02 accessing-merlin6/connect-from-linux.md

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+---
+title: Connecting from a Linux Client
+
+#tags:
+keywords: Linux, connecting, client, configuration, SSH, X11
+last_updated: 23 Oct 2019
+summary: "This document describes a recommended setup for a Linux client."
+sidebar: merlin6_sidebar
+permalink: /merlin6/connect-from-linux.html
+---
+
+## SSH without X11 Forwarding
+
+This is the standard method. Official X11 support is provided through [NoMachine](/merlin6/nomachine.html).
+For normal SSH sessions, use your SSH client as follows:
+
+```bash
+ssh $username@merlin-l-01.psi.ch
+ssh $username@merlin-l-001.psi.ch
+ssh $username@merlin-l-002.psi.ch
+```
+
+## SSH with X11 Forwarding
+
+Official X11 Forwarding support is through NoMachine. Please follow the document
+[Job Submission -> Interactive Jobs](/merlin6/interactive-jobs.html#Requirements) and
+[Accessing Merlin -> NoMachine](/merlin6/nomachine.html) for more details. However,
+we provide a small recipe for enabling X11 Forwarding in Linux.
+
+* For enabling client X11 forwarding, add the following to the start of ``~/.ssh/config``
+to implicitly add ``-Y`` to all ssh connections:
+
+   ```bash
+   ForwardAgent yes
+   ForwardX11Trusted yes
+   ```
+
+* Alternatively, you can add the option ``-Y`` to the ``ssh`` command. In example:
+
+   ```bash
+   ssh -Y $username@merlin-l-01.psi.ch
+   ssh -Y $username@merlin-l-001.psi.ch
+   ssh -Y $username@merlin-l-002.psi.ch
+   ```
+
+* For testing that X11 forwarding works, just run ``xclock``. A X11 based clock should
+popup in your client session:
+
+   ```bash
+   xclock
+   ```