Unity 2018.3 is now available!
Release notes: Unity Blog
Official Installer:
2018.3.0f2: https://beta.unity3d.com/download/6e9a27477296/UnitySetup-2018.3.0f2
sha1: 0540e0a57293e41548a0306108aae8beababc0ee
Note that Unity Hub is now the preferred way to install Unity for Linux. We plan to deprecate standalone installer once Unity Hub fully supports installing through command line.
You can get Unity Hub for Linux here: