Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
想用20.04版本，但19.04甚至不如18.10，反正已经过期了。不给你网络，也没法升级，这样怎么办？
https://www.linuxidc.com/Linux/2015-06/118633.htm 试试这个教程可以不？
