$ sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [819 B]
Get:2 Upgrade tool [1,263 kB]
Fetched 1,264 kB in 0s (0 B/s)
authenticate 'bionic.tar.gz' against 'bionic.tar.gz.gpg'
extracting 'bionic.tar.gz'
Reading cache
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Hit http://ppa.launchpad.net/umang/indicator-stickynotes/ubuntu xenial InRelease
Ign http://dl.google.com/linux/chrome/deb stable InRelease
Hit http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit http://in.archive.ubuntu.com/ubuntu xenial InRelease
Hit http://in.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit http://archive.canonical.com/ubuntu xenial InRelease
Get:1 http://in.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Hit http://dl.google.com/linux/chrome/deb stable Release
Fetched 107 kB in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done