complite linux instruction

Installation.md

@@ -25,3 +25,15 @@ Running Lidarr in a Docker container eases setup and reduces package installatio
 # Linux #
 
 _Mono 4.80 or later is required._
+
+1. Download and unpack to eg: `/opt`
+2. Create Lidarr user and group, eg:
+``` bash
+useradd -s /bin/false -d /var/lib/lidarr/ -r -m -U lidarr
+```
+3. Change owner and permissions for lidarr application files:
+``` bash
+chown -R lidarr:lidarr {Lidar/Dir}
+chmod -R a=,a+X,u+rw,g+r {Lidar/Dir}
+```
+4. Run lidarr as system service: [Autostart on Linux](https://github.com/lidarr/Lidarr/wiki/Autostart-on-Linux)