how to upgrade ubuntu 13.10 to ubuntu 14.04 ? It gives an error that "third party sources are disabled couldn't get software list"


Go to Software & Updates --> Other Software tab and check the third-party repositories listed there. See image below

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  • It is still not working. What if i upgrade through usb then will all of the installed programs remain or they will be erased ? – user272502 Apr 26 '14 at 17:44

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