1.输入该命令按回车键:sudo apt update
2.输入该命令按回车键:sudo apt upgrade
3.按照提示输入Y按回车键
4.按照默认选项按回车键
5.输入该命令按回车键:sudo do-release-upgrade -c
6.输入该命令按回车键:reboot
7.输入该命令按回车键:sudo do-release-upgrade
8.按照提示输入y按回车键
9.按照提示按回车键
10.按照提示输入y按回车键
11.按照提示输入y按回车键
12.按照提示输入y按回车键
13.输入该命令按回车键:lsb_release -a