RHCE Internet access problems

RHCE Internet access-general Linux technology-Linux technology and application information. For details, refer to the following section. What is depressing is that, although it has been two months since Linux was installed, it has been using the Internet access method of China Netcom and ADSL. There is no problem with accessing the Internet in Linux in this way...
Last month, it was transferred to campus network. Huawei's 802.1x certification. Download the Linux client provided by the school. After the installation... follow the commands provided in the document for authentication. The connection may always fail.
Provide an error code 5. There is no description of the error code in the document. Very depressed... think about it... don't worry about it... let's learn the basics first...
But every time I use Linux, I cannot access the Internet... it feels uncomfortable... although I have been playing with black screens all the time... but you can also use init 5 to view webpages... windows and Linux cannot be replaced ..
Who can access the Internet here? Provide the client and specific usage ..
Thank you ~!~!~
I have definitely passed goolge's solution... but I can't even try several times... in despair ..