It seems like the GasPoweredGames forum has been shut down, making it nearly impossible to find the program called Core Maximizer online, which allows you to run Supreme Commander and its expansion Supreme Commander Forged Alliance on multiple CPU threads.
I installed Steam on Linux just to try it out, but I ran into the problem that when downloading games, the download speed wouldn’t climb above 15-20 kbytes/s. I tried switching download servers, switching from Wi-Fi to a wired connection, but nothing worked. Then I started searching online for solutions, which led me to the following steps that fixed my problem.
In a nutshell, the problem is that the Linux Steam client queries DNS nameservers too frequently, which quickly overwhelms the network. The solution is to install a DNS cache on the system, which we can do as follows:
Anyone who has a dedicated GMod server has probably encountered the error where the server can’t download larger addons from the workshop, showing “Download fail”.
The only solution for this is if the addon is already downloaded on your home computer as well, which you can find at the following location:
Steam/steamapps/common/GarrysMod/garrysmod/addons/
Here you can find the addon by name, which in my case looks like this:
garrys_bombs_5_base_edition_290395033.gma
Upload this to the server’s GMod addons folder, then rename it so that only the number sequence at the end remains, with a “ds_” prefix added before it: