我正在尝试将 Ubuntu 从 16.04 更新到 18.04，但一直出现错误。我一直在努力解决这个问题，但仍然没有找到解决办法。有什么想法吗？
没有显示任何错误，所以我不知道如何继续。
命令：sudo do-release-upgrade
终端输出：
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [819 B]
Get:2 Upgrade tool [1,246 kB]
Fetched 1,247 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://packages.ros.org/ros/ubuntu xenial InRelease
Ign http://dl.google.com/linux/chrome/deb stable InRelease
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB]
Hit http://in.archive.ubuntu.com/ubuntu xenial InRelease
Ign http://dl.google.com/linux/earth/deb stable InRelease
Get:2 http://in.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Hit http://dl.google.com/linux/chrome/deb stable Release
Hit http://dl.google.com/linux/earth/deb stable Release
Get:3 http://in.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Fetched 325 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
更新：
正如评论中所建议的，我尝试从控制台执行相同的命令。但我仍然得到相同的结果。我做了以下事情：
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo do-release-upgrade