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I was upgrading ubuntu 14 LTS to 18 LTS. But it went wrong. There were many broken softwares. Now I am stuck in 16 LTS but with only the terminal. So I am planning to completely uninstall this and to get a new release ubuntu 18. Can someone help how to uninstall at first?

Thanks

Debashis
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    There is no Ubuntu 14 LTS, or 18 LTS. Ubuntu releases are yy.mm in format unless specialist (eg. Ubuntu Core 18 intended for IoT or appliance devices). You don't need to un-install it, you install over it (and you can install over the system directories without touching user directories if you wish with the right options) – guiverc May 27 '19 at 09:49
  • The old one was Ubuntu 14.04.5 LTS. During upgrade stocked with 16.04.6 LTS and only the terminal is coming. So can I install Ubuntu 18.04.2 LTS over the old one? – Debashis May 27 '19 at 09:57
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    You can install Ubuntu 18.04.2 LTS over the old one. Installing Ubuntu 18.04 over the old one will completely overwrite the old OS. – karel May 27 '19 at 09:59
  • In your case, I'd probably install using something-else as it allows me to select my partitions & I can decide if I format or don't (I opt no-format; but be careful this check-box is easily overlooked). Without format it will note what packages you added to your system, then wipe system directories, install the new system, the re-add back your added packages (if found in new sources [ubuntu repositories] then ask you to reboot. It does not touch your user directories unless you tell it to format that partition; but backup first regardless (better safe than sorry) – guiverc May 27 '19 at 10:13
  • @guiverc re:" then re-add back your added packages" are you telling OP to do this, or are you saying that the Ubuntu installer does this? If the latter, are you sure? – heynnema May 27 '19 at 12:36
  • @heynnema I meant the installer does it (something-else) IF packages are found using the new sources.list (ie. ubuntu repos for 'new' release). Yes I use it (ubiquity, I think calamares too). I word nearly always in what I'd do and thus features I use – guiverc May 27 '19 at 13:19
  • Thank You all for your suggestions. I just take a backup and install fresh Ubuntu 18.04. – Debashis May 27 '19 at 13:30

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There is no need for an uninstall. Create a backup of your important data and then do a fresh Ubuntu 18.04 install, this will overwrite your current operating system.

Turtle10000
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