linux基础复习

https://www.runoob.com/linux/linux-command-manual.html

https://idc.wanyunshuju.com/

https://blog.csdn.net/shangyuanlang/article/details/80682788

https://blog.51cto.com/wzlinux/2367100#h25

https://cloud.tencent.com/developer/article/1072053

https://blog.51cto.com/hujiangtao/1940375

http://www.178linux.com/   

https://www.zsythink.net/archives/3155