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i was upgrading to 15.10 with these two commands that i found on ubuntu forums:

sudo sed -i 's/vivid/wily/g' /etc/apt/sources.list

sudo apt-get update && sudo apt-get dist-upgrade

but at some point it showed network failure and it stopped so i tried this command:

apt-get update

but the problem i encountered is that even on rebooting on screen it flashes 15.04 now if i redo the upper two commands will it create duplicate repositories that i will have to take care of? because i dont have enough space on my laptop to waste. and any other detail for my upgrade to 15.10 would be highly appreciated!

Ron
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dinesh agarwal
  • 193

1 Answers1

48

Please be aware that 15.10 is still in development. Development releases are unstable, and not suited for people who do not want to fix/report/triage bugs. If you want a stable Ubuntu version, stick to the official released versions. For added stability, choose a Ubuntu LTS release.

That said, to upgrade to a development release open your terminal by pressing Alt + F2 and type update-manager -d.

enter image description here

You can choose to upgrade from this window.

Or, If you prefer to do this from the command-line, 

sudo do-release-upgrade -d
Ron
  • 20,938