How to Set proxy for Internet access in Linux

In Linux, use proxy to set up Internet access-general Linux technology-Linux technology and application information. For details, refer to the following section. Because the campus network is charged for accessing foreign websites, I found a free IP address to access the Internet two days ago. The settings are as follows:

Because the school uses a static IP address, first set the system static IP Address

1. Set the system IP address and MAC address (use the terminal root)
Ifconfig eth0 aaa: bbb: ccc: ddd
Ifconfig eth0 ether aa: bb: cc: dd: ee: ff

2. Set proxy service IP Address
Set the Proxy Server IP address and port number in the browser. For example, in Mozilla firefox, set steps: Edit> preferences> advanced> network> connection settings> manually set proxy
Enter the proxy IP address and port number.