Looking for logging into the Ubuntu Raspberry Pi 2 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 Raspberry Pi 2 site. After that you can login as usual with your login credentials.
https://www.ubuntu.com/download/iot/raspberry-pi-2-3
https://wiki.ubuntu.com/ARM/RaspberryPi
https://ubuntu-mate.org/raspberry-pi/
https://www.elektronikpraxis.vogel.de/40-betriebssysteme-fuer-den-raspberry-pi-a-488934/
https://www.raspberrypi.org/forums/viewtopic.php?t=101141
https://medium.com/a-swift-misadventure/how-to-setup-your-raspberry-pi-2-3-with-ubuntu-16-04-without-cables-headlessly-9e3eaad32c01
https://praxistipps.chip.de/raspberry-pi-ubuntu-installieren-so-gehts_46394
http://www.raspberry-pi-geek.de/Magazin/2015/03/Zwei-Ubuntu-Betriebssysteme-auf-dem-Raspberry-Pi-2
https://www.bitblokes.de/ubuntu-mate-16-04-lts-auf-dem-raspberry-pi-installieren/
https://fossbytes.com/install-ubuntu-mate-on-raspberry-pi-2-3/
https://ubuntu-mate.community/t/what-is-the-root-password-of-ubuntu-mate-16-04-2-lte/12918
https://raspberrypi.stackexchange.com/questions/660/what-password-to-use-to-log-in-after-the-first-boot
https://www.heise.de/ct/ausgabe/2015-17-Ubuntu-auf-dem-Raspberry-Pi-2-2753125.html