Linux - "Evaluate yourself"

In this article i would like to share some of  the tricky questions related to Linux, Let’s have a brain-storming session on Linux, for Linux enthusiasts am sure if you don’t know the answers, you would surely like to browse on these topics.

I will keep updating this article with more questions, here goes version 1 of my draft:- 

• Command to remove a file -file-name (name start with "-" )
• What is the -v flag for when using grep?
• What is the -h flag in rpm?
•  How would you direct stderr to stdout for a given command?
•  You type google.com into your preferred web browser - what happens? – how does DNS/squid/webserver comes into picture
•  Booting procedure of Linux?
•  What is initrd image?
•   How to restrict login to a server for maintenance
•   How to load a module in to the running kernel
•   How to unload a module from the running kernel.
•   How to boot in to single user mode.
•  What are the difference run levels in Linux

 Will add lot’s more in same article, consider this as first draft J