How can root forcefully logout a user?

First, determine the process id (PID) of the shell they are using to login.

Code:

ps aux | grep user

Look for the entry for the login shell. If they are using bash, it will be the line where the last column is -bash. The number in the second column is the PID.
To kill the login shell, type the following:

Code:

kill PID

This should stop the user's login session. I'm not sure if this will also stop any other processes of that user, but if not, you can just use the first command again to find any other processes for the user and kill them.

OR -

Use the who command to see list of logged in users and sudo pkill -KILL -u username to log out user.

How to log in as root in Ubuntu?

By default, you can not log in as root in Ubuntu, but you can mange to after you do the following:

$sudo passwd

and set a password for root.

$su

and type in the root password, then you are logged in as root.

DVD copying software, free, open source

The name of the software is 'Infra Recorder'.

AutoCAD - how to enter block editor and exit it?

Click on the block. Enter the command - 'bedit'.

To exit block editor, enter the command - 'bclose'.

Can not see the desktop when Remote Control in Logmein

(1) Update IE to IE 8 on the controlled machine.
(2) Do Windows update on the controlled machine.