How to deal with low wireless Internet access speed in ubuntu

Many people may experience extremely slow wireless network speeds after installing the ubuntu system. even if many web pages cannot be opened, even the Unicom domain name prompts will appear when you open the website, you only need to execute the following code. Press ctrl + alt + t to call up the terminal. many people encounter extremely slow wireless network speeds after installing the ubuntu system, and even many web pages cannot be opened, even more, when you open a website, you will receive a prompt for the China Unicom domain name. you only need to execute the following code to solve the problem. Press ctrl + alt + t to call up the terminal, and enter sudo suifconfig wlan0 downsudo rmmod-f ath9ksudo modprobe ath9k nohwcrypt = 1 ifconfig wlan0 up in sequence. if the browser still prompts the Unicom domain name, clear the browser cache and try again