JUSTUS2/Visualization - Revision history

K Siegmund: /* Overview */

2025-12-10T11:04:05Z

Overview

← Older revision		Revision as of 13:04, 10 December 2025
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	You will need to do the following steps to use VNC on the cluster:		You will need to do the following steps to use VNC on the cluster:
	* start a vnc server on the cluster - This will create a virtual desktop on that node		# start a vnc server on the cluster - This will create a virtual desktop on that node
	* make an ssh tunnel to allow outside access for yourself to the server		# make an ssh tunnel to allow outside access for yourself to the server
	* use a vnc client on your home desktop to connect to the virtual desktop		# use a vnc client on your home desktop to connect to the virtual desktop
	* kill the vnc server after you finshed		# kill the vnc server after you finshed

	= VNC Server =		= VNC Server =

K Siegmund at 08:39, 21 May 2024

2024-05-21T08:39:26Z

← Older revision		Revision as of 10:39, 21 May 2024
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	</pre>		</pre>
	with n specifying the display number.		with n specifying the display number.
	[[Category:Visualization]]

K Siegmund: /* VNC Client */

2022-08-01T16:23:32Z

VNC Client

← Older revision		Revision as of 18:23, 1 August 2022
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	* '''Login using TurboVNC Java Viewer''' <br />Needed software: [http://turbovnc.org/ TurboVNC], JDK<br /> Open the TurboVNC Java Viewer and navigate to Options... -> Security -> Gateway to fill in the parameters provided by the ''run_vncserver'' script. You can save these settings in the "Global" tab if you want to. Subsequently, click "OK" and connect to the cluster by supplying the VNC Server as given to you by ''run_vncserver''. Before the connection is established, you should be prompted for your SSH and VNC password, respectively.		* '''Login using TurboVNC Java Viewer''' <br />Needed software: [http://turbovnc.org/ TurboVNC], JDK<br /> Open the TurboVNC Java Viewer and navigate to Options... -> Security -> Gateway to fill in the parameters provided by the ''run_vncserver'' script. You can save these settings in the "Global" tab if you want to. Subsequently, click "OK" and connect to the cluster by supplying the VNC Server as given to you by ''run_vncserver''. Before the connection is established, you should be prompted for your SSH and VNC password, respectively.
			{\| style="width: 100%; border-spacing: 20px;"
			\| [[File:turbovnc.jpg\|left\|500px]]
			\|}

	* '''TigerVNCLinux Debian-based''' <code>sudo apt install tigervnc-viewer</code> fill in information supplied by ''run_vncserver'', e.g. <code>xtigervncviewer :3</code>		* '''TigerVNCLinux Debian-based''' <code>sudo apt install tigervnc-viewer</code> fill in information supplied by ''run_vncserver'', e.g. <code>xtigervncviewer :3</code>
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	* '''Login without TurboVNC Java Viewer for Windows users'''<br />Needed software: [https://tigervnc.org/ TigerVNC], [http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html Putty] <br />Start Putty and navigate to Connection -> SSH -> Tunnels to fill in the parameters provided by the ''run_vncserver'' script. Subsequently, clicked "Add" and navigate to Session to connect with the cluster using your username and password. Once the connection is established, start the TigerVNC Client and connect to localhost:n, where n is the display number provided by ''run_vncserver''.		* '''Login without TurboVNC Java Viewer for Windows users'''<br />Needed software: [https://tigervnc.org/ TigerVNC], [http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html Putty] <br />Start Putty and navigate to Connection -> SSH -> Tunnels to fill in the parameters provided by the ''run_vncserver'' script. Subsequently, clicked "Add" and navigate to Session to connect with the cluster using your username and password. Once the connection is established, start the TigerVNC Client and connect to localhost:n, where n is the display number provided by ''run_vncserver''.
	<br>		<br>


	= OpenGL applications within VNC sessions =		= OpenGL applications within VNC sessions =

K Siegmund at 14:27, 14 July 2022

2022-07-14T14:27:20Z

← Older revision		Revision as of 16:27, 14 July 2022
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	</pre>		</pre>
	with n specifying the display number.		with n specifying the display number.
			[[Category:Visualization]]

K Siegmund at 13:35, 14 July 2022

2022-07-14T13:35:28Z

← Older revision		Revision as of 15:35, 14 July 2022
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	<br>		<br>

⚫	= Shutdown your VNC session =

⚫	To exit your VNC session it is not sufficient to only close the VNC viewer, since this will not terminate the VNC Server. The VNC Server will keep running and you will run into problems when you try to start a new VNC session later on. Please use the "log out" function of the desktop environment inside the VNC session, this will terminate the VNC server properly. Alternatively, you can terminate the VNC Server on the compute cluster using
⚫	<pre>
⚫	$ vncserver -kill :n
⚫	</pre>
⚫	with n specifying the display number.

	= OpenGL applications within VNC sessions =		= OpenGL applications within VNC sessions =
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		⚫	= Shutdown your VNC session =
	[[Category:Visualization]]

	[[Category:BwUniCluster_2.0]]
		⚫	To exit your VNC session it is not sufficient to only close the VNC viewer, since this will not terminate the VNC Server. The VNC Server will keep running and you will run into problems when you try to start a new VNC session later on. Please use the "log out" function of the desktop environment inside the VNC session, this will terminate the VNC server properly. Alternatively, you can terminate the VNC Server on the compute cluster using
	[[Category:BwForCluster_JUSTUS_2]]
		⚫	<pre>
		⚫	$ vncserver -kill :n
		⚫	</pre>
		⚫	with n specifying the display number.

K Siegmund: /* VNC Server */

2022-07-14T13:34:41Z

VNC Server

← Older revision		Revision as of 15:34, 14 July 2022
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	First, you have to start the VNC Server on the cluster. The startup procedure depends on the cluster and hardware you are using.		First, you have to start the VNC Server on the cluster. The startup procedure depends on the cluster and hardware you are using.

	The commands below will also work on the login nodes, but if you want to do graphically intensive tasks such as visualizing systems of molecules you should use the visualization nodes with high-performance graphics cards. To ~~start~~ a ~~VNC~~ ~~Server~~ on a ~~visualization~~ ~~node~~ you ~~must~~ ~~log~~ ~~into~~ ~~one~~ of ~~these~~ ~~nodes~~ ~~via~~ ~~SSH~~ ~~using~~ ~~your~~ ~~username~~ ~~and~~ ~~password:~~		The commands below will also work on the login nodes, but if you want to do graphically intensive tasks such as visualizing systems of molecules you should use the visualization nodes with high-performance graphics cards. Note: To actually use the graphics cards on the vis nodes, you will have to put the command "vglrun" before the graphical command you want to run accelerated on the graphic cards.

			To start a VNC Server on a visualization node you must log into one of these nodes via SSH using your username and password:
	$ ssh <UserID>@justus2-vis.uni-ulm.de		$ ssh <UserID>@justus2-vis.uni-ulm.de

K Siegmund: /* Create a Tunnel */

2022-07-14T13:33:18Z

Create a Tunnel

← Older revision		Revision as of 15:33, 14 July 2022
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	<code>ssh -fCL port:localhost:port user@justus2-login03.rz.uni-ulm.de</code>		<code>ssh -fCL port:localhost:port user@justus2-login03.rz.uni-ulm.de</code>

	-f: sends the ssh into the background		-f: sends the ssh into the background # note that you will have to kill the ssh session if you use this option

	-C: compress all data		-C: compress all data

K Siegmund: /* VNC Server */

2022-07-14T13:32:46Z

VNC Server

← Older revision		Revision as of 15:32, 14 July 2022
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	First, you have to start the VNC Server on the cluster. The startup procedure depends on the cluster and hardware you are using.		First, you have to start the VNC Server on the cluster. The startup procedure depends on the cluster and hardware you are using.

			The commands below will also work on the login nodes, but if you want to do graphically intensive tasks such as visualizing systems of molecules you should use the visualization nodes with high-performance graphics cards. To start a VNC Server on a visualization node you must log into one of these nodes via SSH using your username and password:
	* [[VNC Server - bwForCluster Chemistry]]
			$ ssh <UserID>@justus2-vis.uni-ulm.de
	* [[VNC Server - bwForCluster Chemistry - 3D Acceleration]]

			Subsequently, use the following commands to start the VNC Server:
⚫	The VNC server will open a virtual display with a display number. It will e.g. be called ":01"
			$ module load vis/tigervnc
			$ run_vncserver

			If you start a VNC Server for the first time you will be asked to set a password which will be required for clients trying to access your VNC desktop. '''Use a strong password because otherwise an attacker could take control of your VNC session.'''

		⚫	The VNC server will open a virtual display with a display number. It will e.g. be called ":01"

	= Create a Tunnel =		= Create a Tunnel =

K Siegmund at 13:28, 14 July 2022

2022-07-14T13:28:45Z

@@ Line 1: / Line 1: @@
 = Description =
-'''TigerVNC''' is a high-performance implementation of Virtual Network Computing (VNC). VNC is a client/server application that allows
+Virtual Network Computing (VNC) is a protocol to use a virtual desktop on a server on your local computer. It allows you to launch and use graphical applications on remote machines.
 = Overview =
@@ Line 43: / Line 19: @@
 First, you have to start the VNC Server on the cluster. The startup procedure depends on the cluster and hardware you are using.
 * [[VNC Server - bwForCluster Chemistry]]
 * [[VNC Server - bwForCluster Chemistry - 3D Acceleration]]

K Siegmund: K Siegmund moved page TigerVNC to JUSTUS2/Visualization

2022-07-14T13:23:30Z

K Siegmund moved page TigerVNC to JUSTUS2/Visualization

← Older revision	Revision as of 15:23, 14 July 2022
(No difference)