Can't upgrade ubuntu 16.04 to 18.04 LTS
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I need some help. When i try to upgrade ubuntu 16.04 to 18.04 via update manager, It shows an X mark and closes on the preparing stage. And when i try it via terminal. I get this: Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Hit http://us.archive.ubuntu.com/ubuntu xenial InRelease Fetched 0 B in 0s (0 B/s) Reading package lists... Done Building dependency tree Reading state information... Done Restoring original system state Aborting Reading package lists... Done Building dependency tree Reading state information... Done Can someone please help me? Thanks. EDIT: Oh, And btw. I lost my usb. So i can't do a clean install. A