How to remove top panel of ubuntu 16.04 desktop - ubuntu-16.04

I developed a GUI program which runs automatically in full-screen mode on ubuntu 16.04 computer after login. The user must not switch to other program, and never logout. So I needs to remove or hide the top bar(panel) of ubuntu desktop. I searched the ubuntu forms, found no answer. Does anybody know how to do it?.

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Mongodb Compass running but GUI is not visible

I have installed Mongodb Compass on windows 2016 server.
When I Run it, GUI is not visible?
However, Task manager shows that it is running.
I have rebooted the machine, then also the problem is there
Please help to solve the problem.
I had the same problem.
Uninstall MongoDB Compass from 'Programs and Features' via Control Panel
You should download 'Windows (7+)(MSI)' from https://www.mongodb.com/try/download/compass and try to install again

Why is Vivaldi crooked on LinuxMint 20 XFCE over Remmina VNC?

I have installed a virtual machine with Linux Mint 20 XFCE. I access it with Remmina VNC client over Opennebula's built-in VNC server. Everything if fine, except Vivaldi browser is crooked. (See attached screenshot). It does not behave like that all the time, just sporadically. All other programs behave. Any idea why?

How can I get an interactive login with Windows 10 IoT Core running on a Raspberry Pi?

I just installed Windows 10 onto a Raspberry Pi. It started up fine and I can connect (using PowerShell) from my laptop.
I can connect a keyboard and mouse to the Pi but I can't get a login window. All that I can do is change the timezone and reboot. Is there a way to login directly to the device?
I don't need fancy graphical windows. A command line session (à la Linux or PowerShell) would be fine.
If it isn't possible with the core install, does anyone know if Microsoft, or a third party provider, plans to add this feature?
No there is not a command line presented on the local display. The only way to run commands on Win10 IoT is to use PowerShell as described by Keith in this thread or you can use SSH or Telnet. You can interact with applications run on the device via the local display, keyboard and mouse.
Mark Radbourne [MSFT]
You can use PowerShell remoting from another Windows box to do stuff on Windows 10 IoT Core. I've tested this procedure on Windows 10 PowerShell, works fine. Be sure to follow the step to "Remove-Module PSReadline". I was trying to use setcomputername to rename my RPi2 and the command would fail with a command not found error. Once I removed the PSReadline module, the command started working. Hopefully Jason gets this fixed as PSReadline is just too valuable to remove for long. :-)

My app created on XP does not run on Windows 7

I am trying to run an app I created at work (I sent myself the .exe file) so that I could see how it looks on Windows 7.
My laptop (running 64-bit Windows 7) won't even open it, though. It opens some compatibility wizard to try to rectify whatever the problem is, but that doesn't work either.
Is there anything I need besides the .exe itself, that I should have copied over?
A team member using Windows 7 can run it (by checking it out of Subversion and running it in the VS IDE, anyway), but the display if "off" (The FlowLayoutPanel's controls are experiencing a kind of "wardrobe malfunction"). But I, as mentioned, can't even run it.
What might be the problem/solution?
If you are running the Professional edition of Windows 7 or higher then it will include the option to install the "Windows XP Virtual Machine". You can then run your app as normal under the virtual machine, quckest and easiest way to resolve these sort of issues in Windows 7.

VirtualBox: how to extend view in the graphic mode?

I have CentOS-5.6 running on the Oracle's VirtualBox. I would like to know if it possible to have it in full-screen size when running X Window applications. I know such feature is available with VMWare player (you need to download additional vmware tools).
Thanks.
You can follow the instructions on VirtualBox's site for installing Guest Additions. That should allow the screen to automatically resize when you fullscreen VirtualBox. In addition, you may have to adjust the screen resolution in X afterwards if Guest Additions alone don't solve your problem.
You need Virtual Box guest extensions.
In order to install them you first need the RPMForge repository added for yum, follow these instructions:
http://wiki.centos.org/AdditionalResources/Repositories/RPMForge#head-5aabf02717d5b6b12d47edbc5811404998926a1b
Then run this command in a terminal:
yum install dkms