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I was updating my netbook latest version after 1st installation so a lot of updates where there. The updates were downloaded and it was being installed. The computer got switched off in between. Now its not working. I want to just run the command "apt-get upgrade". What is the procedure...

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up vote 0 down vote accepted

You didn't say how it isn't working. I'm assuming that you mean that your computer won't boot. In that case, you can try booting into a LiveCD or LiveUSB environment (of the same version as your Ubuntu installation). Then, mount your hard drive somewhere. I'm assuming that you mounted it on /mnt for the sake of this answer. Any other place is fine, as long as you make the necessary adjustments to my instructions.

sudo mount --bind /sys /mnt/sys
sudo mount --bind /proc /mnt/proc
sudo chroot /mnt

At this point, you're in your machine with root privileges.

apt-get upgrade # Or whatever commands you want.
exit # Back to the live environment...
sudo umount /mnt/{proc,sys}
sudo umount /mnt
sudo reboot
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If you want to upgrade it to Natty 11.04, Ctrl + F2 and type

update-manager -d

This will check for update of distribution.

If you don't want to update your distro then simply (in a terminal):

sudo apt-get update 
sudo apt-get upgrade

For bringing up a terminal Ctrl + T or F2 while you boot or Ctrl + Shift + 8 number 2-8 for the relevant tty

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