尝试通过 ssh 打开程序时出现以下错误。
$ thunar
Thunar: Cannot open display:
$ libreoffice
Failed to open display
$ firefox
Error: GDK_BACKEND does not match available displays
$ keepassx
keepassx: cannot connect to X server
$ keepass2
Unhandled Exception:
System.TypeInitializationException: The type initializer for 'System.Windows.Forms.XplatUI' threw an exception. ---> System.ArgumentNullException: Could not open display (X-Server required. Check your DISPLAY environment variable)
Parameter name: Display
at System.Windows.Forms.XplatUIX11.SetDisplay (IntPtr display_handle) <0x41b3c8a0 + 0x00b9b> in <filename unknown>:0
at System.Windows.Forms.XplatUIX11..ctor () <0x41b3ab20 + 0x001df> in <filename unknown>:0 …