Installing Ubuntu 13.04

Updating Ubuntu

If you have Ubuntu 12.04 installed, first consider whether you want to upgrade at all. Version 12.04 is an LTS version with five years of support, so you could wait until 2014 to upgrade to Ubuntu 14.04. If you still want to upgrade to 13.04, don't forget to upgrade to 12.10 first. Before beginning, it makes sense to turn off the external repositories and PPAs. Use the Software Center Edit | Software Sources function and remove the checkmarks on the Other Software tab.

Next press Alt+F2 and enter update-manager -d . In the empty window of the update manager, an Upgrade button shows at the top. During the upgrade, the installer asks whether you want to keep or replace a specific configuration file; choose to replace if you haven't made any changes. Because Ubuntu is downloading many packages and replacing them, make sure your computer is plugged in to stay charged.

Bootloader Failures

Occasionally the bootloader doesn't appear after an Ubuntu installation, or you can boot only one system. Loading Windows after installing Ubuntu often leads to a bootloader failure. Refer to the "Revival" box for commands you will want to enter in a terminal window. These commands install the GRUB 2 bootloader with help from a Live system so that GRUB identifies all systems correctly.

Revival

To revive an installed Ubuntu, boot up Live mode on the DVD in this issue by choosing the Try Ubuntu without installing option. Be sure that the Live and installed versions are the same architecture. Then, invoke a terminal and execute the following commands. Substitute for /dev/sda6 entry the specific partition in which the root directory (/ ) of the installed Ubuntu is located.

$ sudo mount /dev/sda6 /mnt
$ sudo mount -o bind /dev /mnt/dev
$ sudo mount -o bind /sys /mnt/sys
$ sudo mount -t proc /proc /mnt/proc
$ sudo chroot /mnt
$ grub-mkconfig -o /boot/grub/grub.cfg
$ update-grub2
$ grub-install /dev/sda
$ exit
$ sudo reboot

Use the chroot command (change root) to mount the installed system into your Live system and work with it as if you had booted it. Now you can set up a new GRUB 2.

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