The last privileged port (any port that can't be opened by anyone else but the root user) is:

In chgrp command, the letter you use to add a sticky bit (e.g., to prevent removal of files by non-owner from a directory) is:

newgrp will:

To block/allow regular users to send write messages to your session, you use:

In BASH scripts the symbols '<<' indicate...

What will you get if you try to read from the pseudo-device /dev/zero?

What are the standard commands to install a program from source?

Which of the following will be of no use for running a Windows program on a Linux system?

Which of the following commands will help you diagnose a software RAID system under Linux?

Which of the following utilities displays the RAM usage?

What is LAMP?