Nickolese

When I run the command sudo yum-config-manager --add-repo=http://negativo17.org/repos/fedora-steam.repo I recieve an error that states YumRepo Error: All mirror URLs are not using ftp, http or file. Eg. http://dummy Any idea on how to fix this?

I seem to be having trouble installing Steam on my computer, is there anyway to fix the problem without having to do this? I'd like for it to run as natively as possible, if that's not too much to ask.

Just recently I've installed TMD onto my Linux laptop, and whenever I try to run thedarkmod.x86 nothing happens. And when I tried to run it in the terminal I recieve this error ./thedarkmod.x86: error while loading shared libraries: libpng12.so.0: cannot open shared object file: No such file or directory If anybody else has experienced this problem and resolved it, please tell me how.