Mac replace ruby gem source

Open the terminal first

Enter the gem sources -lcommand in the terminal and check the gem source as follows:
Enter the gem sources --remove https://rubygems.org/command in the terminal and delete the original gem source as follows:

Enter the gem sources -a http://mirrors.aliyun.com/rubygems/command in the terminal to change the gem source to Aliyun, as follows: The
replacement is successful.