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docs.it4i/get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/cygwin-and-x11-forwarding.md
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Cygwin and X11 forwarding Cygwin and X11 forwarding
========================= =========================
### If no able to forward X11 using PuTTY to CygwinX ### If no able to forward X11 using PuTTY to CygwinX
` ```bash
[usename@login1.anselm ~]$ gnome-session & [usename@login1.anselm ~]$ gnome-session &
[1] 23691 [1] 23691
[usename@login1.anselm ~]$ PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused [usename@login1.anselm ~]$ PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused
PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused
(gnome-session:23691): WARNING **: Cannot open display:** (gnome-session:23691): WARNING **: Cannot open display:**
` ```
1. Locate and modify Cygwin shortcut that uses [startxwin](http://x.cygwin.com/docs/man1/startxwin.1.html)
1. Locate and modify
Cygwin shortcut that
uses
[startxwin](http://x.cygwin.com/docs/man1/startxwin.1.html)
locate locate
C:cygwin64binXWin.exe C:cygwin64binXWin.exe
change it change it
to to
C:*cygwin64binXWin.exe -listen tcp* C:*cygwin64binXWin.exe -listen tcp*
![XWin-listen-tcp.png](XWinlistentcp.png "XWin-listen-tcp.png")
2.
Check Putty settings:
Enable X11
forwarding
![](cygwinX11forwarding.png)
![XWin-listen-tcp.png](XWinlistentcp.png "XWin-listen-tcp.png")
2. Check Putty settings:
Enable X11 forwarding
![](cygwinX11forwarding.png)
\ No newline at end of file
docs.it4i/get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/graphical-user-interface.md
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Graphical User Interface Graphical User Interface
======================== ========================
X Window System X Window System
--------------- ---------------
The X Window system is a principal way to get GUI access to the The X Window system is a principal way to get GUI access to the clusters.
clusters.
Read more about configuring [**X Window Read more about configuring [**X Window System**](x-window-system/x-window-and-vnc.html).
System**](x-window-system/x-window-and-vnc.html).
VNC VNC
--- ---
The **Virtual Network Computing** (**VNC**) is a graphical The **Virtual Network Computing** (**VNC**) is a graphical [desktop sharing](http://en.wikipedia.org/wiki/Desktop_sharing "Desktop sharing") system that uses the [Remote Frame Buffer protocol (RFB)](http://en.wikipedia.org/wiki/RFB_protocol "RFB protocol") to remotely control another [computer](http://en.wikipedia.org/wiki/Computer "Computer").
[desktop
sharing](http://en.wikipedia.org/wiki/Desktop_sharing "Desktop sharing")
system that uses the [Remote Frame Buffer
protocol
(RFB)](http://en.wikipedia.org/wiki/RFB_protocol "RFB protocol")
to remotely control another
[computer](http://en.wikipedia.org/wiki/Computer "Computer").
Read more about configuring Read more about configuring **[VNC](../../../salomon/accessing-the-cluster/graphical-user-interface/vnc.html)**.
**[VNC](../../../salomon/accessing-the-cluster/graphical-user-interface/vnc.html)**.
docs.it4i/get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/vnc.md
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VNC VNC
=== ===
The **Virtual Network Computing** (**VNC**) is a graphical [desktop sharing](http://en.wikipedia.org/wiki/Desktop_sharing "Desktop sharing") system that uses the [Remote Frame Buffer protocol (RFB)](http://en.wikipedia.org/wiki/RFB_protocol "RFB protocol") to remotely control another [computer](http://en.wikipedia.org/wiki/Computer "Computer"). It transmits the [keyboard](http://en.wikipedia.org/wiki/Computer_keyboard "Computer keyboard") and [mouse] http://en.wikipedia.org/wiki/Computer_mouse "Computer mouse") events from one computer to another, relaying the graphical [screen](http://en.wikipedia.org/wiki/Computer_screen "Computer screen") updates back in the other direction, over a [network](http://en.wikipedia.org/wiki/Computer_network "Computer network").
The **Virtual Network Computing** (**VNC**) is a graphical [desktop The recommended clients are [TightVNC](http://www.tightvnc.com) or[TigerVNC](http://sourceforge.net/apps/mediawiki/tigervnc/index.php?title=Main_Page) (free, open source, available for almost any platform).
sharing](http://en.wikipedia.org/wiki/Desktop_sharing "Desktop sharing")
system that uses the [Remote Frame Buffer protocol
(RFB)](http://en.wikipedia.org/wiki/RFB_protocol "RFB protocol") to
remotely control another
[computer](http://en.wikipedia.org/wiki/Computer "Computer"). It
transmits the
[keyboard](http://en.wikipedia.org/wiki/Computer_keyboard "Computer keyboard")
and
[mouse](http://en.wikipedia.org/wiki/Computer_mouse "Computer mouse")
events from one computer to another, relaying the graphical
[screen](http://en.wikipedia.org/wiki/Computer_screen "Computer screen")
updates back in the other direction, over a
[network](http://en.wikipedia.org/wiki/Computer_network "Computer network").(http://en.wikipedia.org/wiki/Virtual_Network_Computing#cite_note-1)
The recommended clients are
[TightVNC](http://www.tightvnc.com) or
[TigerVNC](http://sourceforge.net/apps/mediawiki/tigervnc/index.php?title=Main_Page)
(free, open source, available for almost any platform).
Create VNC password Create VNC password
------------------- -------------------
Local VNC password should be set before the first login. Do use a strong >Local VNC password should be set before the first login. Do use a strong password.
password.
` ```bash
[username@login2 ~]$ vncpasswd [username@login2 ~]$ vncpasswd
Password: Password:
Verify: Verify:
` ```
Start vncserver Start vncserver
--------------- ---------------
To access VNC a local vncserver must be started first and also a tunnel >To access VNC a local vncserver must be started first and also a tunnel using SSH port forwarding must be established.
using SSH port forwarding must be established. [See below](vnc.html#linux-example-of-creating-a-tunnel) for the details on SSH tunnels. In this example we use port 61.
[See below](vnc.html#linux-example-of-creating-a-tunnel)
for the details on SSH tunnels. In this example we use port 61.
You can find ports which are already occupied. Here you can see that You can find ports which are already occupied. Here you can see that ports " /usr/bin/Xvnc :79" and " /usr/bin/Xvnc :60" are occupied.
ports " /usr/bin/Xvnc :79" and "
/usr/bin/Xvnc :60" are occupied.
` ```bash
[username@login2 ~]$ ps aux | grep Xvnc [username@login2 ~]$ ps aux | grep Xvnc
username 5971 0.0 0.0 201072 92564 ? SN Sep22 4:19 /usr/bin/Xvnc :79 -desktop login2:79 (username) -auth /home/gre196/.Xauthority -geometry 1024x768 -rfbwait 30000 -rfbauth /home/username/.vnc/passwd -rfbport 5979 -fp catalogue:/etc/X11/fontpath.d -pn username 5971 0.0 0.0 201072 92564 ? SN Sep22 4:19 /usr/bin/Xvnc :79 -desktop login2:79 (username) -auth /home/gre196/.Xauthority -geometry 1024x768 -rfbwait 30000 -rfbauth /home/username/.vnc/passwd -rfbport 5979 -fp catalogue:/etc/X11/fontpath.d -pn
username 10296 0.0 0.0 131772 21076 pts/29 SN 13:01 0:01 /usr/bin/Xvnc :60 -desktop login2:61 (username) -auth /home/username/.Xauthority -geometry 1600x900 -depth 16 -rfbwait 30000 -rfbauth /home/jir13/.vnc/passwd -rfbport 5960 -fp catalogue:/etc/X11/fontpath.d -pn username 10296 0.0 0.0 131772 21076 pts/29 SN 13:01 0:01 /usr/bin/Xvnc :60 -desktop login2:61 (username) -auth /home/username/.Xauthority -geometry 1600x900 -depth 16 -rfbwait 30000 -rfbauth /home/jir13/.vnc/passwd -rfbport 5960 -fp catalogue:/etc/X11/fontpath.d -pn
..... .....
` ```
Choose free port e.g. 61 and start your VNC server: Choose free port e.g. 61 and start your VNC server:
` ```bash
[username@login2 ~]$ vncserver :61 -geometry 1600x900 -depth 16 [username@login2 ~]$ vncserver :61 -geometry 1600x900 -depth 16
New 'login2:1 (username)' desktop is login2:1 New 'login2:1 (username)' desktop is login2:1
Starting applications specified in /home/username/.vnc/xstartup Starting applications specified in /home/username/.vnc/xstartup
Log file is /home/username/.vnc/login2:1.log Log file is /home/username/.vnc/login2:1.log
` ```
Check if VNC server is started on the port (in this example 61): Check if VNC server is started on the port (in this example 61):
` ```bash
[username@login2 .vnc]$ vncserver -list [username@login2 .vnc]$ vncserver -list
TigerVNC server sessions: TigerVNC server sessions:
X DISPLAY # PROCESS ID X DISPLAY # PROCESS ID
:61 18437 :61 18437
` ```
Another command: Another command:
` ```bash
[username@login2 .vnc]$ ps aux | grep Xvnc [username@login2 .vnc]$ ps aux | grep Xvnc
username 10296 0.0 0.0 131772 21076 pts/29 SN 13:01 0:01 /usr/bin/Xvnc :61 -desktop login2:61 (username) -auth /home/jir13/.Xauthority -geometry 1600x900 -depth 16 -rfbwait 30000 -rfbauth /home/username/.vnc/passwd -rfbport 5961 -fp catalogue:/etc/X11/fontpath.d -pn username 10296 0.0 0.0 131772 21076 pts/29 SN 13:01 0:01 /usr/bin/Xvnc :61 -desktop login2:61 (username) -auth /home/jir13/.Xauthority -geometry 1600x900 -depth 16 -rfbwait 30000 -rfbauth /home/username/.vnc/passwd -rfbport 5961 -fp catalogue:/etc/X11/fontpath.d -pn
` ```
To access the VNC server you have to create a tunnel between the login To access the VNC server you have to create a tunnel between the login node using TCP **port 5961** and your machine using a free TCP port (for simplicity the very same, in this case).
node using TCP **port 5961** and your machine using a free TCP port (for
simplicity the very same, in this case).
The tunnel must point to the same login node where you launched the VNC >The tunnel must point to the same login node where you launched the VNC server, eg. login2. If you use just cluster-name.it4i.cz, the tunnel might point to a different node due to DNS round robin.
server, eg. login2. If you use just cluster-name.it4i.cz, the tunnel
might point to a different node due to DNS round robin.
###Linux/Mac OS example of creating a tunnel ###Linux/Mac OS example of creating a tunnel
At your machine, create the tunnel: At your machine, create the tunnel:
` ```bash
local $ ssh -TN -f username@login2.cluster-name.it4i.cz -L 5961:localhost:5961 local $ ssh -TN -f username@login2.cluster-name.it4i.cz -L 5961:localhost:5961
` ```
Issue the following command to check the tunnel is established (please Issue the following command to check the tunnel is established (please note the PID 2022 in the last column, you'll need it for closing the tunnel):
note the PID 2022 in the last column, you'll need it for closing the
tunnel):
` ```bash
local $ netstat -natp | grep 5961 local $ netstat -natp | grep 5961
(Not all processes could be identified, non-owned process info (Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.) will not be shown, you would have to be root to see it all.)
tcp 0 0 127.0.0.1:5961 0.0.0.0:* LISTEN 2022/ssh tcp 0 0 127.0.0.1:5961 0.0.0.0:* LISTEN 2022/ssh
tcp6 0 0 ::1:5961 :::* LISTEN 2022/ssh tcp6 0 0 ::1:5961 :::* LISTEN 2022/ssh
` ```
Or on Mac OS use this command: Or on Mac OS use this command:
` ```bash
local-mac $ lsof -n -i4TCP:5961 | grep LISTEN local-mac $ lsof -n -i4TCP:5961 | grep LISTEN
ssh 75890 sta545 7u IPv4 0xfb062b5c15a56a3b 0t0 TCP 127.0.0.1:5961 (LISTEN) ssh 75890 sta545 7u IPv4 0xfb062b5c15a56a3b 0t0 TCP 127.0.0.1:5961 (LISTEN)
` ```
Connect with the VNC client: Connect with the VNC client:
` ```bash
local $ vncviewer 127.0.0.1:5961 local $ vncviewer 127.0.0.1:5961
` ```
In this example, we connect to VNC server on port 5961, via the ssh In this example, we connect to VNC server on port 5961, via the ssh tunnel. The connection is encrypted and secured. The VNC server listening on port 5961 provides screen of 1600x900 pixels.
tunnel. The connection is encrypted and secured. The VNC server
listening on port 5961 provides screen of 1600x900 pixels.
You have to destroy the SSH tunnel which is still running at the You have to destroy the SSH tunnel which is still running at the background after you finish the work. Use the following command (PID 2022 in this case, see the netstat command above):
background after you finish the work. Use the following command (PID
2022 in this case, see the netstat command above):
` ```bash
kill 2022 kill 2022
` ```
### Windows example of creating a tunnel ### Windows example of creating a tunnel
...@@ -143,40 +110,32 @@ Use PuTTY to log in on cluster. ...@@ -143,40 +110,32 @@ Use PuTTY to log in on cluster.
Start vncserver using command vncserver described above. Start vncserver using command vncserver described above.
**Search for the localhost and port number (in this case Search for the localhost and port number (in this case 127.0.0.1:5961).
127.0.0.1:5961).**
` ```bahs
[username@login2 .vnc]$ netstat -tanp | grep Xvnc [username@login2 .vnc]$ netstat -tanp | grep Xvnc
(Not all processes could be identified, non-owned process info (Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.) will not be shown, you would have to be root to see it all.)
tcp 0 0 127.0.0.1:5961 0.0.0.0:* LISTEN 24031/Xvnc tcp 0 0 127.0.0.1:5961 0.0.0.0:* LISTEN 24031/Xvnc
` ```
On the PuTTY Configuration screen go to Connection->SSH->Tunnels On the PuTTY Configuration screen go to Connection->SSH->Tunnels to set up the tunnel.
to set up the tunnel.
Fill the Source port and Destination fields. **Do not forget to click Fill the Source port and Destination fields. **Do not forget to click the Add button**.
the Add button**.
![](putty-tunnel.png) ![](putty-tunnel.png)
Run the VNC client of your choice, select VNC server 127.0.0.1, port Run the VNC client of your choice, select VNC server 127.0.0.1, port 5961 and connect using VNC password.
5961 and connect using VNC password.
### Example of starting TigerVNC viewer ### Example of starting TigerVNC viewer
![](vncviewer.png) ![](vncviewer.png)
In this example, we connect to VNC server on port 5961, via the ssh In this example, we connect to VNC server on port 5961, via the ssh tunnel, using TigerVNC viewer. The connection is encrypted and secured. The VNC server listening on port 5961 provides screen of 1600x900 pixels.
tunnel, using TigerVNC viewer. The connection is encrypted and secured.
The VNC server listening on port 5961 provides screen of 1600x900
pixels.
### Example of starting TightVNC Viewer ### Example of starting TightVNC Viewer
Use your VNC password to log using TightVNC Viewer and start a Gnome Use your VNC password to log using TightVNC Viewer and start a Gnome Session on the login node.
Session on the login node.
![](TightVNC_login.png) ![](TightVNC_login.png)
...@@ -199,69 +158,58 @@ Uncheck both options below the slider: ...@@ -199,69 +158,58 @@ Uncheck both options below the slider:
### Kill screensaver if locked screen ### Kill screensaver if locked screen
If the screen gets locked you have to kill the screensaver. Do not to If the screen gets locked you have to kill the screensaver. Do not to forget to disable the screensaver then.
forget to disable the screensaver then.
` ```bash
[username@login2 .vnc]$ ps aux | grep screen [username@login2 .vnc]$ ps aux | grep screen
username 1503 0.0 0.0 103244 892 pts/4 S+ 14:37 0:00 grep screen username 1503 0.0 0.0 103244 892 pts/4 S+ 14:37 0:00 grep screen
username 24316 0.0 0.0 270564 3528 ? Ss 14:12 0:00 gnome-screensaver username 24316 0.0 0.0 270564 3528 ? Ss 14:12 0:00 gnome-screensaver
[username@login2 .vnc]$ kill 24316 [username@login2 .vnc]$ kill 24316
` ```
### Kill vncserver after finished work ### Kill vncserver after finished work
You should kill your VNC server using command: You should kill your VNC server using command:
` ```bash
[username@login2 .vnc]$ vncserver -kill :61 [username@login2 .vnc]$ vncserver -kill :61
Killing Xvnc process ID 7074 Killing Xvnc process ID 7074
Xvnc process ID 7074 already killed Xvnc process ID 7074 already killed
` ```
Or this way: Or this way:
` ```bash
[username@login2 .vnc]$ pkill vnc [username@login2 .vnc]$ pkill vnc
` ```
GUI applications on compute nodes over VNC GUI applications on compute nodes over VNC
------------------------------------------ ------------------------------------------
The very [same methods as described The very [same methods as described above](https://docs.it4i.cz/get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/x-window-and-vnc#gui-applications-on-compute-nodes), may be used to run the GUI applications on compute nodes. However, for maximum performance, proceed following these steps:
above](https://docs.it4i.cz/get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/x-window-and-vnc#gui-applications-on-compute-nodes),
may be used to run the GUI applications on compute nodes. However, for
maximum performance, proceed following these steps:
Open a Terminal (Applications -> System Tools -> Terminal). Run Open a Terminal (Applications -> System Tools -> Terminal). Run all the next commands in the terminal.
all the next commands in the terminal.
![](gnome-terminal.png) ![](gnome-terminal.png)
Allow incoming X11 graphics from the compute nodes at the login node: Allow incoming X11 graphics from the compute nodes at the login node:
` ```bash
$ xhost + $ xhost +
` ```
Get an interactive session on a compute node (for more detailed info Get an interactive session on a compute node (for more detailed info [look here](../../../../anselm-cluster-documentation/resource-allocation-and-job-execution/job-submission-and-execution.html)). Use the **-v DISPLAY** option to propagate the DISPLAY on the compute node. In this example, we want a complete node (24 cores in this example) from the production queue:
[look
here](../../../../anselm-cluster-documentation/resource-allocation-and-job-execution/job-submission-and-execution.html)).
Use the **-v DISPLAY** option to propagate the DISPLAY on the compute
node. In this example, we want a complete node (24 cores in this
example) from the production queue:
` ```bash
$ qsub -I -v DISPLAY=$(uname -n):$(echo $DISPLAY | cut -d ':' -f 2) -A PROJECT_ID -q qprod -l select=1:ncpus=24 $ qsub -I -v DISPLAY=$(uname -n):$(echo $DISPLAY | cut -d ':' -f 2) -A PROJECT_ID -q qprod -l select=1:ncpus=24
` ```
Test that the DISPLAY redirection into your VNC session works, by Test that the DISPLAY redirection into your VNC session works, by running a X11 application (e. g. XTerm) on the assigned compute node:
running a X11 application (e. g. XTerm) on the assigned compute node:
` ```bash
$ xterm $ xterm
` ```
Example described above: Example described above:
......
docs.it4i/get-started-with-it4innovations/accessing-the-clusters/graphical-user-interface/x-window-system.md
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X Window System X Window System
=============== ===============
The X Window system is a principal way to get GUI access to the clusters. The **X Window System** (commonly known as **X11**, based on its current major version being 11, or shortened to simply **X**, and sometimes informally **X-Windows**) is a computer software system and network [protocol](http://en.wikipedia.org/wiki/Protocol_%28computing%29 "Protocol (computing)") that provides a basis for [graphical user interfaces](http://en.wikipedia.org/wiki/Graphical_user_interface "Graphical user interface") (GUIs) and rich input device capability for [networked computers](http://en.wikipedia.org/wiki/Computer_network "Computer network").
The X Window system is a principal way to get GUI access to the >The X display forwarding must be activated and the X server running on client side
clusters. The **X Window System** (commonly known as **X11**, based on
its current major version being 11, or shortened to simply **X**, and
sometimes informally **X-Windows**) is a computer software system and
network
[protocol](http://en.wikipedia.org/wiki/Protocol_%28computing%29 "Protocol (computing)")
that provides a basis for [graphical user
interfaces](http://en.wikipedia.org/wiki/Graphical_user_interface "Graphical user interface")
(GUIs) and rich input device capability for [networked
computers](http://en.wikipedia.org/wiki/Computer_network "Computer network").
The X display forwarding must be activated and the X server running on
client side
### X display ### X display
In order to display graphical user interface GUI of various software In order to display graphical user interface GUI of various software tools, you need to enable the X display forwarding. On Linux and Mac, log in using the -X option tho ssh client:
tools, you need to enable the X display forwarding. On Linux and Mac,
log in using the -X option tho ssh client:
` ```bash
local $ ssh -X username@cluster-name.it4i.cz local $ ssh -X username@cluster-name.it4i.cz
` ```
### X Display Forwarding on Windows ### X Display Forwarding on Windows
On Windows use the PuTTY client to enable X11 forwarding. In PuTTY On Windows use the PuTTY client to enable X11 forwarding. In PuTTY menu, go to Connection->SSH->X11, mark the Enable X11 forwarding checkbox before logging in. Then log in as usual.
menu, go to Connection->SSH->X11, mark the Enable X11 forwarding
checkbox before logging in. Then log in as usual.
To verify the forwarding, type To verify the forwarding, type
` ```bash
$ echo $DISPLAY $ echo $DISPLAY
` ```
if you receive something like if you receive something like
` ```bash
localhost:10.0 localhost:10.0
` ```
then the X11 forwarding is enabled. then the X11 forwarding is enabled.
### X Server ### X Server
In order to display graphical user interface GUI of various software In order to display graphical user interface GUI of various software tools, you need running X server on your desktop computer. For Linux users, no action is required as the X server is the default GUI environment on most Linux distributions. Mac and Windows users need to install and run the X server on their workstations.
tools, you need running X server on your desktop computer. For Linux
users, no action is required as the X server is the default GUI
environment on most Linux distributions. Mac and Windows users need to
install and run the X server on their workstations.
### X Server on OS X ### X Server on OS X
Mac OS users need to install [XQuartz Mac OS users need to install [XQuartz server](http://xquartz.macosforge.org/landing/).
server](http://xquartz.macosforge.org/landing/).
### X Server on Windows ### X Server on Windows
There are variety of X servers available for Windows environment. The There are variety of X servers available for Windows environment. The commercial Xwin32 is very stable and rich featured. The Cygwin environment provides fully featured open-source XWin X server. For simplicity, we recommend open-source X server by the [Xming project](http://sourceforge.net/projects/xming/). For stability and full features we recommend the
commercial Xwin32 is very stable and rich featured. The Cygwin
environment provides fully featured open-source XWin X server. For
simplicity, we recommend open-source X server by the [Xming
project](http://sourceforge.net/projects/xming/). For
stability and full features we recommend the
[XWin](http://x.cygwin.com/) X server by Cygwin [XWin](http://x.cygwin.com/) X server by Cygwin
|How to use Xwin |How to use Xming | |How to use Xwin |How to use Xming |
| --- | --- | | --- | --- |
|[Install Cygwin](http://x.cygwin.com/)Find and execute XWin.exeto start the X server on Windows desktop computer.[If no able to forward X11 using PuTTY to CygwinX](x-window-system/cygwin-and-x11-forwarding.html)\ |<p>Use Xlaunch to configure the Xming.<p>Run Xmingto start the X server on Windows desktop computer.\ | |[Install Cygwin](http://x.cygwin.com/)Find and execute XWin.exeto start the X server on Windows desktop computer.[If no able to forward X11 using PuTTY to CygwinX](x-window-system/cygwin-and-x11-forwarding.html) |<p>Use Xlaunch to configure the Xming.<p>Run Xmingto start the X server on Windows desktop computer.|
Read more on Read more on [http://www.math.umn.edu/systems_guide/putty_xwin32.html](http://www.math.umn.edu/systems_guide/putty_xwin32.shtml)
[http://www.math.umn.edu/systems_guide/putty_xwin32.html](http://www.math.umn.edu/systems_guide/putty_xwin32.shtml)
### Running GUI Enabled Applications ### Running GUI Enabled Applications
Make sure that X forwarding is activated and the X server is running. >Make sure that X forwarding is activated and the X server is running.
Then launch the application as usual. Use the & to run the application Then launch the application as usual. Use the & to run the application in background.
in background.
` ```bash
$ module load intel (idb and gvim not installed yet) $ module load intel (idb and gvim not installed yet)
$ gvim & $ gvim &
` ```
` ```bash
$ xterm $ xterm
` ```
In this example, we activate the intel programing environment tools, In this example, we activate the intel programing environment tools, then start the graphical gvim editor.
then start the graphical gvim editor.
### GUI Applications on Compute Nodes ### GUI Applications on Compute Nodes
Allocate the compute nodes using -X option on the qsub command Allocate the compute nodes using -X option on the qsub command
` ```bash
$ qsub -q qexp -l select=2:ncpus=24 -X -I $ qsub -q qexp -l select=2:ncpus=24 -X -I
` ```
In this example, we allocate 2 nodes via qexp queue, interactively. We In this example, we allocate 2 nodes via qexp queue, interactively. We request X11 forwarding with the -X option. It will be possible to run the GUI enabled applications directly on the first compute node.
request X11 forwarding with the -X option. It will be possible to run
the GUI enabled applications directly on the first compute node.
**Better performance** is obtained by logging on the allocated compute **Better performance** is obtained by logging on the allocated compute node via ssh, using the -X option.
node via ssh, using the -X option.
` ```bash
$ ssh -X r24u35n680 $ ssh -X r24u35n680
` ```
In this example, we log in on the r24u35n680 compute node, with the X11
forwarding enabled.
HTML commented section #1 (no GUI on Compute nodes - Xvfb) In this example, we log in on the r24u35n680 compute node, with the X11 forwarding enabled.
### The Gnome GUI Environment ### The Gnome GUI Environment
The Gnome 2.28 GUI environment is available on the clusters. We The Gnome 2.28 GUI environment is available on the clusters. We recommend to use separate X server window for displaying the Gnome environment.
recommend to use separate X server window for displaying the Gnome
environment.
### Gnome on Linux and OS X ### Gnome on Linux and OS X
To run the remote Gnome session in a window on Linux/OS X computer, you To run the remote Gnome session in a window on Linux/OS X computer, you need to install Xephyr. Ubuntu package is
need to install Xephyr. Ubuntu package is xserver-xephyr, on OS X it is part of [XQuartz](http://xquartz.macosforge.org/landing/). First, launch Xephyr on local machine:
xserver-xephyr, on OS X it is part of
[XQuartz](http://xquartz.macosforge.org/landing/).
First, launch Xephyr on local machine:
` ```bash
local $ Xephyr -ac -screen 1024x768 -br -reset -terminate :1 & local $ Xephyr -ac -screen 1024x768 -br -reset -terminate :1 &
` ```
This will open a new X window with size 1024x768 at DISPLAY :1. Next, This will open a new X window with size 1024x768 at DISPLAY :1. Next, ssh to the cluster with DISPLAY environment variable set and launch gnome-session
ssh to the cluster with DISPLAY environment variable set and launch
gnome-session
local $ DISPLAY=:1.0 ssh -XC yourname@cluster-name.it4i.cz -i ~/.ssh/path_to_your_key ```bash
... cluster-name MOTD... local $ DISPLAY=:1.0 ssh -XC yourname@cluster-name.it4i.cz -i ~/.ssh/path_to_your_key
yourname@login1.cluster-namen.it4i.cz $ gnome-session & ... cluster-name MOTD...
yourname@login1.cluster-namen.it4i.cz $ gnome-session &
```
On older systems where Xephyr is not available, you may also try Xnest On older systems where Xephyr is not available, you may also try Xnest instead of Xephyr. Another option is to launch a new X server in a separate console, via:
instead of Xephyr. Another option is to launch a new X server in a
separate console, via:
` ```bash
xinit /usr/bin/ssh -XT -i .ssh/path_to_your_key yourname@cluster-namen.it4i.cz gnome-session -- :1 vt12 xinit /usr/bin/ssh -XT -i .ssh/path_to_your_key yourname@cluster-namen.it4i.cz gnome-session -- :1 vt12
` ```
However this method does not seem to work with recent Linux However this method does not seem to work with recent Linux distributions and you will need to manually source
distributions and you will need to manually source /etc/profile to properly set environment variables for PBS.
/etc/profile to properly set environment
variables for PBS.
### Gnome on Windows ### Gnome on Windows
Use Xlaunch to start the Xming server or run the XWin.exe. Select the Use Xlaunch to start the Xming server or run the XWin.exe. Select the "One window" mode.
''One window" mode.
Log in to the cluster, using PuTTY. On the cluster, run the Log in to the cluster, using PuTTY. On the cluster, run the gnome-session command.
gnome-session command.
` ```bash
$ gnome-session & $ gnome-session &
` ```
In this way, we run remote gnome session on the cluster, displaying it In this way, we run remote gnome session on the cluster, displaying it in the local X server
in the local X server
Use System-&gt;Log Out to close the gnome-session Use System-&gt;Log Out to close the gnome-session
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Accessing the Clusters Accessing the Clusters
====================== ======================
The IT4Innovations clusters are accessed by SSH protocol via login The IT4Innovations clusters are accessed by SSH protocol via login nodes.
nodes.
Read more on [Accessing the Salomon >Read more on [Accessing the Salomon Cluste](../salomon/accessing-the-cluster.html)r or [Accessing the Anselm Cluster](../anselm-cluster-documentation/accessing-the-cluster.html) pages.
Cluste](../salomon/accessing-the-cluster.html)r or
[Accessing the Anselm
Cluster](../anselm-cluster-documentation/accessing-the-cluster.html)
pages.
### PuTTY ### PuTTY
On **Windows**, use [PuTTY ssh On **Windows**, use [PuTTY ssh client](accessing-the-clusters/shell-access-and-data-transfer/putty/putty.html).
client](accessing-the-clusters/shell-access-and-data-transfer/putty/putty.html).
### SSH keys ### SSH keys
Read more about [SSH keys Read more about [SSH keys management](accessing-the-clusters/shell-access-and-data-transfer/ssh-keys.html).
management](accessing-the-clusters/shell-access-and-data-transfer/ssh-keys.html).
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Accessing the Clusters
======================
The IT4Innovations clusters are accessed by SSH protocol via login
nodes.
Read more on [Accessing the Salomon
Cluste](../../../salomon/accessing-the-cluster.html)r or
[Accessing the Anselm
Cluster](../../../anselm-cluster-documentation/accessing-the-cluster.html)
pages.
### PuTTY
On **Windows**, use [PuTTY ssh
client](putty/putty.html).
### SSH keys
Read more about [SSH keys management](ssh-keys.html).
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Pageant SSH agent Pageant SSH agent
================= =================
Pageant holds your private key in memory without needing to retype a passphrase on every login.
Pageant holds your private key in memory without needing to retype a
passphrase on every login.
- Run Pageant. - Run Pageant.
- On Pageant Key List press *Add key* and select your private - On Pageant Key List press *Add key* and select your private key (id_rsa.ppk).
key (id_rsa.ppk).
- Enter your passphrase. - Enter your passphrase.
- Now you have your private key in memory without needing to retype a - Now you have your private key in memory without needing to retype a passphrase on every login.
passphrase on every login.
![](PageantV.png)
![](PageantV.png)
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PuTTY PuTTY
===== =====
PuTTY - before we start SSH connection
PuTTY - before we start SSH connection
--------------------------------------------------------------------------------- ---------------------------------------------------------------------------------
### Windows PuTTY Installer ### Windows PuTTY Installer
We recommned you to download "**A Windows installer for everything 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).
except PuTTYtel**" with **Pageant*** (SSH authentication agent) and
**PuTTYgen** (PuTTY key generator) which is available >After installation you can proceed directly to private keys authentication using ["Putty"](putty.html#putty).
[here](http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html). "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.
After installation you can proceed directly
to private keys authentication using
["Putty"](putty.html#putty).
"Change Password for Existing Private Key" is optional.
"Generate a New Public/Private key (`id_rsa/id_rsa.ppk` ): `600 (-rw-------)` pair" is intended for users without
Public/Private key (`id_rsa/id_rsa.ppk` ): `600 (-rw-------)` in the initial email containing login credentials.
"Pageant" is optional. "Pageant" is optional.
### PuTTYgen ### PuTTYgen
PuTTYgen is the PuTTY key generator. Read more how to load in an 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.html) if needed.
existing private key and change your passphrase or generate a new
public/private key pair using [PuTTYgen](puttygen.html)
if needed.
### Pageant SSH agent ### Pageant SSH agent
[Pageant](pageant.html) holds your private key in memory [Pageant](pageant.html) holds your private key in memory without needing to retype a passphrase on every login. We recommend its usage.
without needing to retype a passphrase on every login. We recommend its
usage.
PuTTY - how to connect to the IT4Innovations cluster PuTTY - how to connect to the IT4Innovations cluster
-------------------------------------------------------- --------------------------------------------------------
- Run PuTTY - Run PuTTY
- Enter Host name and Save session fields with [Login - Enter Host name and Save session fields with [Login address](../../../../salomon/accessing-the-cluster/shell-and-data-access/shell-and-data-access.html) and browse Connection - &gt; SSH -&gt; 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"**.
address](../../../../salomon/accessing-the-cluster/shell-and-data-access/shell-and-data-access.html)
and browse Connection - &gt; SSH -&gt; Auth menu. ![](PuTTY_host_Salomon.png)
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 -&gt; Connection - &gt; SSH -&gt; Auth: - Category -&gt; Connection - &gt; SSH -&gt; Auth:
Select Attempt authentication using Pageant. Select Attempt authentication using Pageant.
Select Allow agent forwarding. Select Allow agent forwarding.
Browse and select your [private Browse and select your [private key](../ssh-keys.html) file.
key](../ssh-keys.html) file.
![](PuTTY_keyV.png)
![](PuTTY_keyV.png)
- Return to Session page and Save selected configuration with *Save* button.
- Return to Session page and Save selected configuration with *Save*
button. ![](PuTTY_save_Salomon.png)
![](PuTTY_save_Salomon.png)
- Now you can log in using *Open* button. - Now you can log in using *Open* button.
![](PuTTY_open_Salomon.png) ![](PuTTY_open_Salomon.png)
- Enter your username if the *Host Name* input is not in the format - Enter your username if the *Host Name* input is not in the format "username@salomon.it4i.cz".
"username@salomon.it4i.cz". - Enter passphrase for selected [private key](../ssh-keys.html) file if Pageant **SSH authentication agent is not used.**
- Enter passphrase for selected [private
key](../ssh-keys.html) file if Pageant **SSH
authentication agent is not used.**
Another PuTTY Settings Another PuTTY Settings
---------------------- ----------------------
- Category -&gt; Windows -&gt; Translation -&gt; Remote character set - Category -&gt; Windows -&gt; Translation -&gt; Remote character set and select **UTF-8**.
and select **UTF-8**. - Category -&gt; Terminal -&gt; Features and select **Disable application keypad mode** (enable numpad)
- Save your configuration on Session page in to Default Settings with *Save* button .
- Category -&gt; Terminal -&gt; Features and select **Disable
application keypad mode** (enable numpad)
- Save your configuration on Session page in to Default Settings with
*Save* button .
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PuTTY key generator PuTTY key generator
=================== ===================
PuTTYgen is the PuTTY key generator. You can load in an existing private key and change your passphrase or generate a new public/private key pair.
PuTTYgen is the PuTTY key generator. You can load in an existing private
key and change your passphrase or generate a new public/private key
pair.
### Change Password for Existing Private Key ### Change Password for Existing Private Key
You can change the password of your SSH key with "PuTTY Key Generator". You can change the password of your SSH key with "PuTTY Key Generator". Make sure to backup the key.
Make sure to backup the key.
- Load your [private key](../ssh-keys.html) file with - Load your [private key](../ssh-keys.html) file with *Load* button.
*Load* button.
- Enter your current passphrase. - Enter your current passphrase.
- Change key passphrase. - Change key passphrase.
- Confirm key passphrase. - Confirm key passphrase.
- Save your private key with *Save private key* button. - Save your private key with *Save private key* button.
![](PuttyKeygeneratorV.png)
![](PuttyKeygeneratorV.png)
### Generate a New Public/Private key (`id_rsa/id_rsa.ppk` ): `600 (-rw-------)` pair ### Generate a New Public/Private key
You can generate an additional public/private key pair and insert public You can generate an additional public/private key pair and insert public key into authorized_keys file for authentication with your own private key.
key into authorized_keys file for authentication with your own private
key.
- Start with *Generate* button. - Start with *Generate* button.
![](PuttyKeygenerator_001V.png) ![](PuttyKeygenerator_001V.png)
- Generate some randomness. - Generate some randomness.
![](PuttyKeygenerator_002V.png) ![](PuttyKeygenerator_002V.png)
- Wait. - Wait.
![](PuttyKeygenerator_003V.png) ![](PuttyKeygenerator_003V.png)
- Enter a *comment* for your key using format - Enter a *comment* for your key using format 'username@organization.example.com'.
'username@organization.example.com'.
Enter key passphrase. Enter key passphrase.
Confirm key passphrase. Confirm key passphrase.
Save your new private key `in "*.ppk" `format with *Save private Save your new private key `in "*.ppk" `format with *Save private key* button.
key* button.
![](PuttyKeygenerator_004V.png)
![](PuttyKeygenerator_004V.png)
- Save the public key with *Save public key* button. - Save the public key with *Save public key* button.
You can copy public key out of the ‘Public key for pasting into You can copy public key out of the ‘Public key for pasting into authorized_keys file’ box.
authorized_keys file’ box.
![](PuttyKeygenerator_005V.png)
![](PuttyKeygenerator_005V.png)
- Export private key in OpenSSH format "id_rsa" using Conversion -&gt; Export OpenSSH key
- Export private key in OpenSSH format "id_rsa" using Conversion
-&gt; Export OpenSSH key ![](PuttyKeygenerator_006V.png)
![](PuttyKeygenerator_006V.png)
- Now you can insert additional public key into authorized_keys file
for authentication with your own private key.
You must log in using ssh key received after registration. Then
proceed to [How to add your own
key](../ssh-keys.html).
- Now you can insert additional public key into authorized_keys file for authentication with your own private key.
You must log in using ssh key received after registration. Then proceed to [How to add your own key](../ssh-keys.html).
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SSH keys SSH keys
======== ========
Key management
Key management
------------------------------------------------------------------- -------------------------------------------------------------------
After logging in, you can see .ssh/ directory with SSH keys and After logging in, you can see .ssh/ directory with SSH keys and authorized_keys file:
authorized_keys file:
```bash
$ cd /home/username/ $ cd /home/username/
$ ls -la .ssh/ $ ls -la .ssh/
total 24 total 24
...@@ -18,38 +16,17 @@ authorized_keys file: ...@@ -18,38 +16,17 @@ authorized_keys file:
-rw------- 1 username username 1675 May 21 2014 id_rsa -rw------- 1 username username 1675 May 21 2014 id_rsa
-rw------- 1 username username 1460 May 21 2014 id_rsa.ppk -rw------- 1 username username 1460 May 21 2014 id_rsa.ppk
-rw-r--r-- 1 username username 392 May 21 2014 id_rsa.pub -rw-r--r-- 1 username username 392 May 21 2014 id_rsa.pub
```
Please note that private keys in >Please note that private keys in .ssh directory are without passphrase and allow you to connect within the cluster.
.ssh directory are without passphrase and allow you to connect within
the cluster.
### Access privileges on .ssh folder ### Access privileges on .ssh folder
- `.ssh` directory: 700 (drwx------) - .ssh directory: 700 (drwx------)
- Authorized_keys, known_hosts and public key (.pub file): 644 (-rw-r--r--)
directory: - Private key (id_rsa/id_rsa.ppk): 600 (-rw-------)
700 (drwx------)
-
Authorized_keys, known_hosts and public key (`.pub` file): `644 (-rw-r--r--)`
known_hosts and
public key
(`.pub`
file):
`644 (-rw-r--r--)`
-
``
Private key (`id_rsa/id_rsa.ppk` ): `600 (-rw-------)`
(`id_rsa/id_rsa.ppk`
):
`600 (-rw-------)`
```bash
cd /home/username/ cd /home/username/
chmod 700 .ssh/ chmod 700 .ssh/
chmod 644 .ssh/authorized_keys chmod 644 .ssh/authorized_keys
...@@ -57,22 +34,18 @@ the cluster. ...@@ -57,22 +34,18 @@ the cluster.
chmod 644 .ssh/known_hosts chmod 644 .ssh/known_hosts
chmod 600 .ssh/id_rsa chmod 600 .ssh/id_rsa
chmod 600 .ssh/id_rsa.ppk chmod 600 .ssh/id_rsa.ppk
```
Private key (`id_rsa/id_rsa.ppk` ): `600 (-rw-------)` Private key
----------- -----------
The path to a private key is usually /home/username/.ssh/ >The path to a private key is usually /home/username/.ssh/
Private key (`id_rsa/id_rsa.ppk` ): `600 (-rw-------)` file in "id_rsa" or `"*.ppk" `format is used to Private key file in "id_rsa" or `"*.ppk" `format is used to authenticate with the servers. Private key is present locally on local side and used for example in SSH agent [Pageant (for Windows users)](putty/PageantV.png). The private key should always be kept in a safe place.
authenticate with the servers.
Private key (`id_rsa/id_rsa.ppk` ): `600 (-rw-------)` is present locally
on local side and used for example in SSH agent [Pageant (for Windows
users)](putty/PageantV.png). The private key should
always be kept in a safe place.
An example of private key An example of private key format:
format:
```bash
-----BEGIN RSA PRIVATE KEY----- -----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEAqbo7jokygnBpG2wYa5NB45ns6+UKTNLMLHF0BO3zmRtKEElE MIIEpAIBAAKCAQEAqbo7jokygnBpG2wYa5NB45ns6+UKTNLMLHF0BO3zmRtKEElE
aGqXfbYwvXlcuRb2d9/Y5dVpCZHV0kbY3NhtVOcEIe+1ROaiU9BEsUAhMNEvgiLV aGqXfbYwvXlcuRb2d9/Y5dVpCZHV0kbY3NhtVOcEIe+1ROaiU9BEsUAhMNEvgiLV
...@@ -100,47 +73,40 @@ format: ...@@ -100,47 +73,40 @@ format:
OqDBtZIuFv9U1WAg0gzGwt/0Y9u2c8m0nXziUS6AePxy5sBHs7g9C9WeZRz/nCWK OqDBtZIuFv9U1WAg0gzGwt/0Y9u2c8m0nXziUS6AePxy5sBHs7g9C9WeZRz/nCWK
+cHIm7XOwBEzDKz5f9eBqRGipm0skDZNKl8X/5QMTT5K3Eci2n+lTw== +cHIm7XOwBEzDKz5f9eBqRGipm0skDZNKl8X/5QMTT5K3Eci2n+lTw==
-----END RSA PRIVATE KEY----- -----END RSA PRIVATE KEY-----
```
Public key Public key
---------- ----------
Public key file in "*.pub" format is used to Public key file in "*.pub" format is used to verify a digital signature. Public key is present on the remote side and allows access to the owner of the matching private key.
verify a
digital signature. Public
key is present on the remote
side and allows access to
the owner of the matching private key.
An example of public key An example of public key format:
format:
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCpujuOiTKCcGkbbBhrk0Hjmezr5QpM0swscXQE7fOZG0oQSURoapd9tjC9eVy5FvZ339jl1WkJkdXSRtjc2G1U5wQh77VE5qJT0ESxQCEw0S+CItWBKqXhC9E7gFY+UyP5YBZcOneh6gGHyCVfK6H215vzKr3x+/WvWl5gZGtbf+zhX6o4RJDRdjZPutYJhEsg/qtMxcCtMjfm/dZTnXeafuebV8nug3RCBUflvRb1XUrJuiX28gsd4xfG/P6L/mNMR8s4kmJEZhlhxpj8Th0iIc+XciVtXuGWQrbddcVRLxAmvkYAPGnVVOQeNj69pqAR/GXaFAhvjYkseEowQao1 username@organization.example.com ```bash
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCpujuOiTKCcGkbbBhrk0Hjmezr5QpM0swscXQE7fOZG0oQSURoapd9tjC9eVy5FvZ339jl1WkJkdXSRtjc2G1U5wQh77VE5qJT0ESxQCEw0S+CItWBKqXhC9E7gFY+UyP5YBZcOneh6gGHyCVfK6H215vzKr3x+/WvWl5gZGtbf+zhX6o4RJDRdjZPutYJhEsg/qtMxcCtMjfm/dZTnXeafuebV8nug3RCBUflvRb1XUrJuiX28gsd4xfG/P6L/mNMR8s4kmJEZhlhxpj8Th0iIc+XciVtXuGWQrbddcVRLxAmvkYAPGnVVOQeNj69pqAR/GXaFAhvjYkseEowQao1 username@organization.example.com
```
### How to add your own key ### How to add your own key
First, generate a new keypair of your public and private key: First, generate a new keypair of your public and private key:
```bash
local $ ssh-keygen -C 'username@organization.example.com' -f additional_key local $ ssh-keygen -C 'username@organization.example.com' -f additional_key
```
Please, enter **strong** **passphrase** for securing your private key. >Please, enter **strong** **passphrase** for securing your private key.
You can insert additional public key into authorized_keys file for You can insert additional public key into authorized_keys file for authentication with your own private key. Additional records in authorized_keys file must be delimited by new line. Users are not advised to remove the default public key from authorized_keys file.
authentication with your own private key. Additional records in
authorized_keys file must be delimited by new line. Users are
not advised to remove the default public key from authorized_keys file.
Example: Example:
```bash
$ cat additional_key.pub > ~/.ssh/authorized_keys $ cat additional_key.pub > ~/.ssh/authorized_keys
```
In this example, we add an additional public key, stored in file In this example, we add an additional public key, stored in file additional_key.pub into the authorized_keys. Next time we log in, we will be able to use the private addtional_key key to log in.
additional_key.pub into the authorized_keys. Next time we log in, we
will be able to use the private addtional_key key to log in.
### How to remove your own key ### How to remove your own key
Removing your key from authorized_keys can be done simply by deleting Removing your key from authorized_keys can be done simply by deleting the corresponding public key which can be identified by a comment at the end of line (eg. username@organization.example.com).
the corresponding public key which can be identified by a comment at the
end of line (eg. username@organization.example.com).
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VPN - Connection fail in Win 8.1 VPN - Connection fail in Win 8.1
================================ ================================
**Failed to initialize connection subsystem Win 8.1 - 02-10-15 MS patch **Failed to initialize connection subsystem Win 8.1 - 02-10-15 MS patch**
AnyConnect users on Windows 8.1 will receive a "Failed to initialize AnyConnect users on Windows 8.1 will receive a "Failed to initialize connection subsystem" error after installing the Windows 8.1 02/10/15 security patch. This OS defect introduced with the 02/10/15 patch update will also impact WIndows 7 users with IE11. Windows Server 2008/2012 are also impacted by this defect, but neither is a supported OS for AnyConnect.
connection subsystem" error after installing the Windows 8.1 02/10/15
security patch. This OS defect introduced with the 02/10/15 patch update
will also impact WIndows 7 users with IE11. Windows Server
2008/2012 are also impacted by this defect, but neither is a supported
OS for AnyConnect.
**Workaround:** **Workaround:**
- Close the Cisco AnyConnect Window and the taskbar mini-icon - Close the Cisco AnyConnect Window and the taskbar mini-icon
- Right click vpnui.exe in the 'Cisco AnyConnect Secure Mobility - Right click vpnui.exe in the 'Cisco AnyConnect Secure Mobility Client' folder. (C:Program Files (x86)CiscoCisco AnyConnect Secure Mobility Client)
Client' folder. (C:Program Files (x86)CiscoCisco AnyConnect
Secure Mobility
- Client)
- Click on the 'Run compatibility troubleshooter' button - Click on the 'Run compatibility troubleshooter' button
- Choose 'Try recommended settings' - Choose 'Try recommended settings'
- The wizard suggests Windows 8 compatibility. - The wizard suggests Windows 8 compatibility.
......
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Applying for Resources Applying for Resources
====================== ======================
Computational resources may be allocated by any of the following [Computing resources allocation](http://www.it4i.cz/computing-resources-allocation/?lang=en) mechanisms.
Computational resources may be allocated by any of the following Academic researchers can apply for computational resources via [Open Access Competitions](http://www.it4i.cz/open-access-competition/?lang=en&lang=en).
[Computing resources
allocation](http://www.it4i.cz/computing-resources-allocation/?lang=en)
mechanisms.
Academic researchers can apply for computational resources via [Open Anyone is welcomed to apply via the [Directors Discretion.](http://www.it4i.cz/obtaining-computational-resources-through-directors-discretion/?lang=en&lang=en)
Access
Competitions](http://www.it4i.cz/open-access-competition/?lang=en&lang=en).
Anyone is welcomed to apply via the [Directors Foreign (mostly European) users can obtain computational resources via the [PRACE (DECI) program](http://www.prace-ri.eu/DECI-Projects).
Discretion.](http://www.it4i.cz/obtaining-computational-resources-through-directors-discretion/?lang=en&lang=en)
Foreign (mostly European) users can obtain computational resources via In all cases, IT4Innovations’ access mechanisms are aimed at distributing computational resources while taking into account the development and application of supercomputing methods and their benefits and usefulness for society. The applicants are expected to submit a proposal. In the proposal, the applicants **apply for a particular amount of core-hours** of computational resources. The requested core-hours should be substantiated by scientific excellence of the
the [PRACE (DECI) proposal, its computational maturity and expected impacts. Proposals do undergo a scientific, technical and economic
program](http://www.prace-ri.eu/DECI-Projects).
In all cases, IT4Innovations’ access mechanisms are aimed at
distributing computational resources while taking into account the
development and application of supercomputing methods and their benefits
and usefulness for society. The applicants are expected to submit a
proposal. In the proposal, the applicants **apply for a particular
amount of core-hours** of computational resources. The requested
core-hours should be substantiated by scientific excellence of the
proposal, its computational maturity and expected impacts.
Proposals do undergo a scientific, technical and economic
evaluation. The allocation decisions are based on this evaluation. The allocation decisions are based on this
evaluation. More information at [Computing resources evaluation. More information at [Computing resources allocation](http://www.it4i.cz/computing-resources-allocation/?lang=en) and [Obtaining Login Credentials](obtaining-login-credentials.html) page.
allocation](http://www.it4i.cz/computing-resources-allocation/?lang=en)
and [Obtaining Login
Credentials](obtaining-login-credentials.html) page.
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