Set it to static IP in network manager, but use DHCP mode corresponding to your school in MentoHUST. First use the built-in data authentication to see if it can be authenticated. If not, grab a package with MentoHUSTTool (it is recommended to grab the package under Windows now and switch to Ubuntu to avoid the failure of the first method, and then switch to Windows and Ubuntu) and try authentication again. RP can be certified if it is good. If both cases fail, it means that your school is likely to start the client authentication algorithm V3, and basically you don't have to consider authentication under Linux.