5.4.4p1 as an example doesn't have an Unity editor. Only way to get files for the Linux Native of this specific version is by downloading their TargetSupportInstaller. The installer itself uses NSIS and is easily extractable via p7zip
https://download.unity3d.com/download_unity/84eca32fb10b/TargetSupportInstaller/UnitySetup-Linux-Support-for-Editor-5.4.4p1.exe