The upgrade failed due to a connectivity issue:
2016-02-09 09:48:22,006 ERROR IOError/SystemError in cache.update(): 'W:Failed
to fetch http://mirror.nus.edu.sg/ubuntu/dists/wily/universe/source/Sources
Unable to connect to mirror.nus.edu.sg:http:
, W:Failed to fetch
http://mirror.nus.edu.sg/ubuntu/dists/wily/multiverse/source/Sources Unable to
connect to mirror.nus.edu.sg:http:
, W:Failed to fetch
http://mirror.nus.edu.sg/ubuntu/dists/wily/main/binary-amd64/Packages Unable
to connect to mirror.nus.edu.sg:http:
You'll need to investigate why you can't connect to the mirror of Ubuntu
which you have configured and sort that out or switch mirrors and see if
you can connect to a different one.
** Changed in: ubuntu-release-upgrader (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1543474
Title:
I am trying to upgrade..
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