+Webshell gives you access to an arvados virtual machine from your browser with no additional setup.
+
+{% include 'notebox_begin' %}
+Some Arvados clusters may not have webshell set up. If you do not see a "Log in" button or "web shell" column, you will have to follow the "Unix":ssh-access-unix.html or "Windows":ssh-access-windows.html @ssh@ instructions.
+{% include 'notebox_end' %}