After installing Umbraco following Installation Tutorial on official website, I cannot found how to go to the admin panel. And Umbraco installation finish page only asks me to go to front page.
Then I need to ask google. After searching a while, I got that the default admin url is /umbraco, if the website url is redino.net, then the admin url is redino.net/umbraco
And this value can be modified in web.config file under appSettings section:
<add key="umbracoPath" value="~/umbraco" />