LinuxPC server without display, keyboard, and mouse

Linux Enterprise Application-Linux server application information for a Linux PC server without a display, a keyboard, and a mouse. For more information, see the following. Today, it took several hours to install Red Hat Linux on old computers that had previously been eliminated to serve as servers for learning.
In order to save electricity (saving the society !), After the server is installed, can I remove the display and keyboard? The answer is yes.

After the RedHat linux server is started, the display displays the following lines:
Starting eth0 [OK]
Starting xinetd [OK]
............
Then, it stops in the login window and waits for the user to log on. Now the server is running. ---- You must be clear about this.

I. CMOS settings
Halt on no errors, that is, when BIOS self-check is performed, no halt error is found. No keyboard. BIOS self-check must be incorrect. (Not tested ).

Ii. install linux (Redhat AS3.0)
During installation, the monitor and keyboard are connected without the mouse. It is installed on the Character interface, and some necessary programs are selected without installing X windows.
Note: by default, telnet-server is not installed and must be installed for later telnet server Management.
IP: 192.168.0.1
Add User adduser test1
Passwd test1 --- add the password of test1

3. Shut down and remove the display and keyboard (the video card is not removed)

4. Start the machine and wait for several minutes. On the cmd interface of the win2k computer (192.168.0.3), telnet 192.168.0.1 or directly run telnet 192.168.0.1.
The linux telnet server program does not allow the root user to log on by default. This is why test1.

Some operations require the root permission. What should I do? --- use the su root command

V. server shutdown
Run shutdown-h now after su root
Tip: the shutdown command cannot be found.
Switch to the/sbin directory and run shutdown.
Run/sbin/shutdown-h now.