Ubuntu16升级到18

sudo apt update
sudo apt dist-upgrade
sudo apt autoremove
sudo apt-get install update-manager-core
sudo gedit /etc/update-manager/release-upgrades 
确保update-manager行设置为lts
update-manager -c

如果提示：

{%r%}

Your python install is corrupted. Please fix the '/usr/bin/python' symlink.

{%endr%}

可以运行命令解决

{%g%}

sudo ln -sf /usr/bin/python2.7 /usr/bin/python

{%endg%}

或者重装Python

{%g%}

sudo apt-get install --reinstall python

{%endg%}

参考链接：

https://blog.csdn.net/weixin_44003563/article/details/90271622