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?

Which file would be returned by ls File[A5] ?

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?

With a umask set to 027, what is the initial mode for a newly created file?