在一台老旧笔记本上安装了centos7 

有一个usb 的无线网卡, tp-link TL-WN725N

芯片型号  RTL8188EUS 802.11n Wireless Network Adapter

希望使用此网卡，因此需要安装驱动。

到芯片官网,中文官网没找到,搜索到英文官网的驱动,下载后却无法成功编译。

搜索到一个GitHub上的驱动 ,根据说明文档 成功编译安装。

驱动地址:https://github.com/lwfinger/rtl8188eu

可能需要iwconfig 之类的工具,源码 https://github.com/HewlettPackard/wireless-tools

设置连接WiFi 直接看这个

https://blog.csdn.net/xxb249/article/details/84319897

后期发现使用 wpa_cli 管理WIFI(连接、切换等)更简单，因为：

The wpa_supplicant system consists of the following components:

wpa_supplicant.conf

the configuration file describing all networks that the user wants the computer to connect to.

wpa_supplicant

the program that directly interacts with the network interface.

wpa_cli

the client program that provides a high-level interface to the functionality of the daemon.

wpa_passphrase

a utility needed to construct wpa_supplicant.conf files that include encrypted passwords.

官网：https://w1.fi/wpa_supplicant/

具体使用可参考：https://blog.csdn.net/bulebin/article/details/85253631

man手册： https://linux.die.net/man/8/wpa_supplicant

注：此笔记本真的很旧，只能安装32位centos7.