If you cannot log on to the J2EE Engine using the Visual Administrator, you can still use Telnet as a tool to administer the server. In this way, you can contact the console of the server directly, and can work with all console commands that are described in the Reference Manual.
1. Start Telnet (it is delivered with most operating systems)
2. Enter the command open.
3. The system queries which host and port you wish to connect to. You can enter the IP number of the desired server here. If you have started the program on this host, you can use localhost. By default, the port number is 50008.
4. The program then connects to the server and this displays the SAP logo and an input prompt for login.
If this connection works, you know that the server is basically functional. This does not mean, however, that all functions of the server are running.
You can obtain an overview of the available commands with the command MAN. MAN <command> displays a short explanation of a command.
The commands are grouped into a number of groups that can be activated and deactivated. You can obtain an overview of the groups with the command ADD. To activate a group of commands, enter the command ADD <group>.
For a complete overview of the commands, see the Reference Manual of the SAP J2EE Engine.