Hello.
I use ubuntu 16.04 x64 and I was able to compile the engine for my system. It’s work!
I have a very big project, it was created in windows, but now need run this project in linux.
My project use “E Extended Standard Library” and JS plugin.
How a can install this and others plugins without epic launcher?
launcher is can’t working in linux
So short answer you are out of luck, there is no marketplace so no downloads.
Long answer:
You have couple options. If the plugin creator is nice they do have a repository you can clone so in this case: Log In and no idea what the JS plugin is my guess is this? GitHub - ncsoft/Unreal.js: Unreal.js: Javascript runtime built for UnrealEngine 4
You can clone those to your plugins directory (Plugins | Unreal Engine Documentation)
If the plugin creator does not provide such access (which would be common for payed stuff) you can install a Windows VM, install the launcher, download the plugin into an empty project and migrate that project over to Linux, copying the plugin from one project to another should work after that. In theory.
The first option is of course preferable. The best option would be to force Epic to release the launcher code so we can make it work on Linux, if they are not willing to invest their time into it we can.