[docs] added linux documentation

Author: silentrald

docs/wiki/Linux.md

@@ -0,0 +1,55 @@
+# Linux Guide
+
+## Installation
+
+Go to [Releases](https://github.com/Zagrios/bs-manager/releases) page and go to the latest release. Download the necessary build installer for your distro (see below).
+
+### Ubuntu, Debian
+
+Install the `.deb` build and run the following command:
+```bash
+apt install bsmanager.deb
+```
+
+### CentOS, Fedora
+
+Install the `.rpm` build and run the following command:
+```bash
+rpm -i bsmanager.rpm
+```
+
+### Arch, Manjaro
+
+Install the `.pacman` build and run the following command:
+```bash
+pacman -U bsmanager.pacman
+```
+
+## Proton Setup
+
+[Proton](https://github.com/ValveSoftware/Proton) is needed to run the Beat Saber executable under Linux. You need to download this from either from Steam or building it from their GitHub repo.
+
+Once Proton is installed, when you open your BSManager application for the first time, it will ask you to link the _Proton Folder_ so that it can access the `proton` binary inside it. This will also check if the folder you've selected is valid or not. You can also change this in the future by going to the **settings page** and search for the _Proton Folder_.
+
+## Wine Install [Optional]
+
+[Wine](https://www.winehq.org/) is a tool to run windows application under Linux. BSManager uses to run [BSIPA](https://nike4613.github.io/BeatSaber-IPA-Reloaded/) so that you can play Beat Saber with mods. You can install `wine` depending on your package manager. If you don't install it, this will just fallback to using the `wine` executable found in your _Proton Folder_.
+
+# Troubleshooting
+
+## Permission denied on "bs-version.json"
+
+<pre>
+Unhandled Exception UnhandledRejection Error: EACCES: permission denied, open '/opt/BSManager/resources/assets/jsons/bs-versions.json'
+</pre>
+
+To fix this issue, the current user must have write permissions to the "bs-versions.json". To correct the permissions do command below:
+
+```bash
+chmod +002 /opt/BSManager/resources/assets/jsons/bs-versions.json
+
+# or
+
+chown $(whoami) /opt/BSManager/resources/assets/jsons/bs-versions.json
+```
+