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1.) Run with: LC_ALL=C %command% Screen main menu (32bit run) 2.) Run with: LC_ALL=C %command%_64 Screen main menu (32bit run too) 3.) Terminal: cd "/home/<user>/.steam/steam/steamapps/common/Kerbal Space Program" ls -R > export Exported LS 4.) Terminal commands: uname -a : Linux <pc_name> 4.2.0-36-generic #42-Ubuntu SMP Thu May 12 22:05:35 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux steam : Running Steam on ubuntu 15.10 64-bit STEAM_RUNTIME is enabled automatically edit: Add (4)

okey, but why on 64bit xubuntu steam downloaded only 32bit ? where is error ?

1. Windows 7 64bit -> Steam -> Download KSP -> i have choose 32bit or 64bit run reinstall OS to 2. Linux Xubuntu 15.10 x86_64 (64bit) -> Steam -> Download KSP: only 32 bit KSP run ?! Why? KSP_Data folder have about 2.1GB and KSP_x64_Data have about 820kB. On main KSP folder is exists file KSP.x86 and KSP.x86_64. If i run without steam manual KSP.x86_64 game is 32bit. Why? Is Correct this? KSP Data is unity files no windows or linux files. So Files call unity core no OS. Assent -> Unity (KSP run file) -> OS. So in this logic i can migrate file from Windows KSP 64bit to Linux KSP version. This is theory. Method 1. (not work) 1. Copy KSP_x64_Data from windows version to linux version KSP 2. Run KSP.x86_64 3. Game is only 32bit Method 2. (maybe work IDK) 1. Open KSP_x64_Data in windows version 2. Select ALL files and folders and copy 3. Open KSP_Data in Linux version 4. Paste and rewrite all files 5. Run KSP.x86_64 6. On right-down corner is v1.1.3 .... (x64). KSP say (x64) Is now Linux KSP on 64 bit ????