Counter Strike: GO Classic Competitive ,MapGroup not found'

How to solve: ,,Mapgroup not found" error in CS:GO Classic Competitive:

1.
cd steam/csgo/csgo
nano gamemodes_server.txt

2.
You should find a commented line, starting with a 2:
2//some comment

3.
Delete 2 before the commetn:
//some comment

4.
Restart server

Now it should work, it's a bug, valve somehow left a ,,2" before the line, and because of that, the server thinks, that its the end-of-file, so the map groups are not loaded.

Windows Server 2008 R2 RDP Port Change

You need to do 3 steps to enable and change RDP Port in Windows Server 2008, 2008R2, 2012. You need to do this, if you have more servers at the same IP address, behind a router.

1st step: Enable RDP in System settings. You can go there by right clicking on Computer -> Propreties. Choose Advanced System Settings from the left side menu.

2nd Step: Change RDP Port: Open the registry editor (regedit: open cmd -> regedit.exe). Select HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TerminalServer\WinStations\RDP-Tcp\PortNumber . Change to decimal mode, and change the port number, then click ok.

3rd Step: Enable the new Port in the Firewall settings. Open Server Manager, Select Firewall Settings in the left menu, right click on Inbound Rouls -> New. Choose TCP, set Port number, and name it.

Thats all. After this you should restart your server, then everything should work fine. Default port for RDP is 3389 (TCP). Enjoy.