YOu can add the combo pack mod in, till the SDX team adds in their own prefabs, everything is set kinda vanilla for this initial release, all you have to do is drag n drop the combo pack prefabs in, and replace the mixer with the combo pack one.
Desert underground has it, wasteland, underground, according to my looking at biome xml. Those are the easiest lol Nitrate is meant to be a late game item, so it would be easy to find early game.
Install fresh copy of 7d2d via steam, then verify the game from steam, then install the launcher, then install True Survival. THat SHOULD install a fresh copy, verify it, all should go fine, if not, he has bad issues
I suggest creating a new thread, posting your issue, Linux has been troublesome for awhile, might need others that run Linux to take a look too.
We are running it on a windows server 12
Make sure the dedi is 16.2, heres the steamcmd code we use
steamcmd +login anonymous +force_install_dir C:\Users\Administrator\Desktop\7d2d +app_update 294420 -beta alpha16.2 -validate +quit