Linux系统中的TTY

参考：

解密TTY]https://www.cnblogs.com/liqiuhao/p/9031803.html

彻底理解Linux的各种终端类型以及概念 https://blog.csdn.net/dog250/article/details/78766716

Linux终端和Line discipline图解 https://blog.csdn.net/dog250/article/details/78818612

What Are Teletypes, and Why Were They Used with Computers?   https://www.howtogeek.com/727213/what-are-teletypes-and-why-were-they-used-with-computers/