Looking for logging into the Ubuntu Unity Manager site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Ubuntu Unity Manager site. After that you can login as usual with your login credentials.
https://wiki.ubuntuusers.de/Displaymanager/
https://wiki.ubuntuusers.de/LightDM/
https://askubuntu.com/questions/492605/how-to-restore-the-unity-login-screen-after-installing-xubuntu-desktop-in-ubuntu
https://wiki.ubuntu.com/LightDM
https://itsfoss.com/use-unity-ubuntu-17-10/
https://ubuntuforums.org/showthread.php?t=2234955
http://ubuntuhandbook.org/index.php/2015/03/restore-default-login-screen-ubuntu-14-04/
http://tipsonubuntu.com/2016/08/20/change-login-screen-via-gtk-themes-ubuntu-16-04/
https://bugs.launchpad.net/bugs/1733557
https://www.reddit.com/r/Ubuntu/comments/9hagsd/ubuntu_1804_just_keeps_returning_to_login_screen/
https://linuxconfig.org/how-to-install-unity-desktop-on-ubuntu-18-04-bionic-beaver-linux
https://www.linuxbabe.com/ubuntu/install-unity-desktop-ubuntu-18-04-lts
https://arstechnica.com/information-technology/2018/05/ubuntu-18-04-the-return-of-a-familiar-interface-marks-the-best-ubuntu-in-years/