15.04 release has reached End Of Life on Feb 2016; we now are in 2018. This is time to do a fresh install with a supported release. https://wiki.ubuntu.com/Releases
http://cdimage.ubuntu.com/ubuntu/releases/
15.04 release has reached End Of Life on Feb 2016; we now are in 2018. This is time to do a fresh install with a supported release. /wiki.ubuntu. com/Releases
https:/
http:// cdimage. ubuntu. com/ubuntu/ releases/