https://www.ginac.de/tutorial/

Target: Connect physically seperated machines

深夜，独坐家中，闲来无事，翻起了自己以前写过的文章和笔记。不能说井井有条吧，只能说杂乱不堪。在此静坐反思，寻求解决方法。

First, open up Terminal. Navigate to the directory where the system stores the list of PAMs by typing cd /etc/pam.d/ and open the sudo file there in your favorite command-line text editor.