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As you can see, the "who" utility provides a great deal of
information about what is going on with the system. However, to learn more,
you can also try the "whodo" utility.
The "whodo" utility is used to see who is on the system, and what they are doing at the moment. |
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The same information and more can be obtained from the "w" utility that also displays the number of users logged in, how long the system has been up, and the system load average. The "w" utility uses the following options
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Okay, that was a big chunk. Why not try some of these commands yourself and see who else is sharing your UNIX system. By the way, you can also change who you are logged in as by using the "su" utility, or which group you are in by using the "newgrp" utility. Of course, you will have to have the privileges or the passwords involved. Below is an example of the utilities in action using the "id" utility to keep track. I logged in as user "selena", changed to user "erict" and then changed my group to "www". Notice that you must "exit" from each change of identity to get back to the previous state.
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