Test this procedure:
First: You need to update the system.
Open a terminal,
Press Ctrl+Alt+T
Run it:
sudo -i
apt-get update
apt-get dist-upgrade
Reboot your system to finish installing updates, and to upgrade to new available version:
Open a terminal,
Press Ctrl+Alt+T
Run it:
sudo -i
nano /etc/apt/sources.list
In the open file, delete the content and paste this:
deb http://ar.archive.ubuntu.com/ubuntu/ trusty main restricted
# deb-src http://ar.archive.ubuntu.com/ubuntu/ trusty main restricted
deb http://ar.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
# deb-src http://ar.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
deb http://ar.archive.ubuntu.com/ubuntu/ trusty universe
# deb-src http://ar.archive.ubuntu.com/ubuntu/ trusty universe
deb http://ar.archive.ubuntu.com/ubuntu/ trusty-updates universe
# deb-src http://ar.archive.ubuntu.com/ubuntu/ trusty-updates universe
deb http://ar.archive.ubuntu.com/ubuntu/ trusty multiverse
# deb-src http://ar.archive.ubuntu.com/ubuntu/ trusty multiverse
deb http://ar.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
# deb-src http://ar.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb http://ar.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
# deb-src http://ar.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu trusty-security main restricted
# deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted
deb http://security.ubuntu.com/ubuntu trusty-security universe
# deb-src http://security.ubuntu.com/ubuntu trusty-security universe
deb http://security.ubuntu.com/ubuntu trusty-security multiverse
# deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse
deb http://archive.canonical.com/ubuntu trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner
deb http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://extras.ubuntu.com/ubuntu trusty main
deb http://ar.archive.ubuntu.com/ubuntu/ trusty-proposed universe multiverse restricted main
Ctrl + O, save file. Ctrl + X, close nano.
Continue run in a terminal:
sudo -i
apt-get clean
apt-get update
apt-get dist-upgrade
apt-get autoremove
apt-get -f install
dpkg --configure -a
apt-get clean
reboot
do-release-upgrade
as root or not? – s3lph Dec 04 '14 at 20:38sudo do-release-upgrade
? That makes you root. It stands for Super User Do, and the computer will run the command. – Tim Dec 04 '14 at 20:56