UE4 only supports 64-Bit linux: A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums
If you’re looking to run the editor on Linux you have to compile it: A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums
Make sure you have a powerful enough computer to run it, which could be an issue if you’re using a 32-bit operating system.