Looking for logging into the Ubuntu Gui 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 Gui site. After that you can login as usual with your login credentials.
https://askubuntu.com/questions/223501/ubuntu-gets-stuck-in-a-login-loop
http://www.google.de/url?url=http://www.beginninglinux.com/home/troubleshoot/ubuntu-does-not-start-gui-or-login-loop
https://www.youtube.com/watch%3Fv%3DbMkuscasyrI
https://www.youtube.com/watch%3Fv%3DOG4deLa_vK8
https://ubuntuforums.org/showthread.php%3Ft%3D2338480
https://devtalk.nvidia.com/default/topic/1046157/ubuntu-16-04-gui-login-loop-after-installing-nvidia-driver/
https://www.quora.com/Why-is-the-Ubuntu-16-04-desktop-not-loading-after-the-login
https://www.ubuntu.com/desktop
https://unix.stackexchange.com/questions/368748/ubuntu-16-04-gui-freezes-on-login-start-page
https://linuxconfig.org/how-to-install-gnome-on-ubuntu-18-04-bionic-beaver-linux
https://itsfoss.com/how-to-fix-no-unity-no-launcher-no-dash-in-ubuntu-12-10-quick-tip/
https://answers.launchpad.net/ubuntu/%2Bsource/lightdm/%2Bquestion/197479
https://serverfault.com/questions/274858/ubuntu-mysql-gui-logins-with-certificate-key