答：步骤如下:
1. sudo apt update (更新软件源)
2. sudo apt upgrade (更新内核相关的包)
3. sudo apt dist-upgrade
4. sudo apt-get autoremove
5. sudo apt install update-manager-core
6. sudo do-release-upgrade
如何将ubuntu16.04升级到ubuntu 18.04?
原文：https://www.cnblogs.com/dakewei/p/10932636.html