Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife

Err Upgrade tool signature
  404  Not Found [IP: 91.189.92.201 80]
Err Upgrade tool
  404  Not Found [IP: 91.189.92.201 80]
Fetched 0 B in 0s (0 B/s)
WARNING:root:file 'saucy.tar.gz.gpg' missing
Failed to fetch
Fetching the upgrade failed. There may be a network problem.