![]() ![]() ![]() This should open an X window in XQuartz, such as in the example below. a program gives you error messages related to not being able to open your display, a quick way to isolate the source of the issue is to type ‘xterm’ into your RACC shell prompt. If you experience problems with the display, e.g. If this is the case, substitute your own username in the example below. When you open it, you’ll see a prompt that shows you your Mac’s name and your Mac username, which is most often not your Reading University username. The Terminal app is in the Utilities folder in Applications. Using the NX Linux managed desktop service instead of X11 forwarding is the recommended way to avoid these problems, and usually results in a more responsive user experience. If the xauth path isn’t mentioned in ssh_config at all, then xauth probably isn’t the cause of your X11 forwarding problems. If the xauth path in /etc/ssh/ssh_config is wrong, edit the file and correct it. ssh/config in your home directory on the Mac, as described in “ act-ssh for Linux and Mac users – step by step guide“. Before using XQuartz for the first time, add the following important security related lines to. Install XQuartz to enable X11 forwarding with the Terminal app on a Mac. Please refer to the MobaXterm’s own documentation to find out more. sftp sessions for file transfer possibilities. MobaXterm has many more useful features, such as e.g. In the vast majority of cases, the problem is solved by trying one (or all) of the above fixes. ![]() If the ‘X Server’ icon is green and you still can’t get a working X window, try rebooting your PC first before contacting IT, as long running sessions on Windows have been known to cause issues with X11 forwarding in the past. It can be toggled on and off by clicking the icon. Make sure that the ‘X Server’ icon on the top right is green, such as seen in the picture below. In this case, try starting a fresh ssh session by restarting MobaXterm. If this window doesn’t appear, it means that the X11 forwarding is not working successfully. This should open a separate X window, such as in the example below. In this case, use the command below and substitute your username. If you are connecting from a personal machine, it’s likely that your username there is different from your IT username. If you are working on a university owned machine, your username will be your IT username and you can connect as shown in the example below. This will show you a prompt of your username on the local PC. Once you have MobaXterm running, you can click on ‘Start local terminal’ in the middle of the window. On the download page you can choose blue to run the executable or green to install MobaXterm on your machine (if you have administrator rights). Note that you can also access this link via AppsAnywhere. You can download or run MobaXterm from their website. In general, the terms X11, X, X Windows, and X Window System can be used interchangeably. The program itself is hosted on a different machine than (the unix server) where the graphical interface is being displayed (your machine). X11 refers to the 11th (and final) version of the X Window System, which is also the most common. This enables drawing and moving windows on the display device and also interacting with a mouse and keyboard in addition to simply typing commands. X forwarding refers to executing such a program remotely on the unix server through an ssh connection. X is a window system which provides the basic framework for a GUI environment on unix operating systems. ![]()
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