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I can't seem to upgrade to the latest version ubuntu. It asked me once, but I was doing something else at the time. Now that I ant to do it I can't find it. I can find software updater, but that just seems to update programs that are on the computer.

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Did you try sudo do-release-upgrade ? What version are you on, btw? – Mahesh Jun 11 '13 at 14:15

The update manager has the upgrade button you are looking for.

start the update manager with typing update-manager in a terminal. The upgrade button will be shown there.

Or you can search for it in dash by typing update manager.

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Click on the Gear on the top-right corner> System Settings...>Software&Updates there go to the Updates Tab and then check that "Notify me of a new Ubuntu version is set to: For any version. then execute the Software updater and it should tell you (if not hit refresh) Hope it helps

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Click Alt + F2 and type update-manager at the prompt or do the same in Terminal.

If this does not show the update open a Terminal window and type in

sudo apt-get update
sudo apt-get upgrade

The sudo apt-get upgrade command updates any installed software requiring an update before you proceed

sudo do-release-upgrade

This searches for and upgrades your system

How to safely upgrade from an older Ubuntu version to a newer Is the best and safest way.

Edited with corrections suggested below

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sudo apt-get install needs a package name after.... – Alvar Jun 11 '13 at 14:27
OK, but it tells you if there is anything that needs updating. 0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded. – SimplySimon Jun 12 '13 at 7:32
the sudo apt-get upgrade would upgrade any available software. the sudo apt-get install is just random, makes no sense... – Alvar Jun 12 '13 at 8:06
You are so correct! I must have had a bad 5 minutes when I wrote the answer and didn't really check it properly. My apologies :( – SimplySimon Jun 12 '13 at 8:43

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