From time to time my Kali Linux with Xfce desktop environment boots up without the taskbar and start button. Only desktop shortcuts and the desktop itself are visible, that is, the system looks like this (this is a full, uncropped screen).
It is almost impossible to work in such a system, although Linux works, it allows you to open a terminal window, launch desktop shortcuts.
Usually in this case, I right-clicked on the desktop, selected “Open Terminal Here” from the context menu, and entered the command to reboot the system:
After a reboot, the Taskbar might or might not appear, just as it did when the computer was turned on.
I don't know if this is a problem with my personal Kali Linux and Xfce installation, or a bug in the desktop environment or VirtualBox.
In addition to rebooting the entire system, there is another, faster way to reboot the desktop.
To do this, press the Win key.
This will open the Operating System Menu.
Click the “Log Out” button with the mouse.
Select “Log Out”.
You will be prompted to enter a username and password to log in.
Enter your username and password.
Now Xfce has booted up normally, with the Taskbar and other elements.
To quickly log out of Linux, you can use the keyboard shortcut Ctrl+Alt+Delete.
Alternatively, you can restart the Display Manager with the following command:
sudo systemctl restart lightdm
To enter it, open the terminal, this can be done by right-clicking on the desktop and selecting “Open Terminal Here”, or use the keyboard shortcut Ctrl+Alt+t