Our school to Sisu network must use the campus account login, generally use the client, but you can also use the web version landing.
Recently installed a server, because it is the pure character interface of Ubuntu, so want to install software, have extranet, no way to use the client or Web form, so I can only use the Curl tool comes with my own internet.
Using the Web-based packet capture test, it is found that sending a post data to the client is local, so you can use the following command:
$curl--data "loginname=yourloginname&pass=yourpassword&onclick=" http://192.168.168.168
Use this command to log in successfully, to log off, because the page has JavaScript, so it is not very good, but because the school's landing system is a long time without landing can automatically exit, so there is no problem.
Use Curl to log in to your online account