I cannot install centora on ubuntu 14.04

[apinto]

If you can access Sentora login (and it askes for password) it means sentora was installed.
You can see all the sentora passwords on your /root/passwords.txt
These same passwords were also displayed on the install script, right before the script request you to reboot.

Also take this in consideration:

As per the system requirements in the docs, a minimal version of Ubuntu is required. As you talk about Gnome, it sounds like you tried installing this on a non-minimal, desktop install.