Linux interview questions

This is a post that is in its infancy & will undergo some updates from time to time.

But for now here are a few interview questions that I've been asked in recent years:

1.  How to configure check which package provides a particular file?
2. What are system calls & how do we check them?
3. How to register a client with RHN?
4. Explain steps to configure NIC bonding.
5. What are kernel modules? How to list them & load them?
6. How to update the OS without the use of RHN?
7. When is "yum localinstall" useful?
8. How to configure multipathing?
9. How to roll back an OS update like RHEL 6.7 to 6.5?
10. Can you rename network interface cards from the OS.
11. Explain about performance monitoring tools available in Linux.
12. How would you configure generation of a crash dump if a kernel panic occurs?
13. How can you run a command every 10 seconds without using cron or at?
14. Explain various RAID levels available in Linux.
15. How can you migrate data residing in a file system from one storage vendor to another while utilizing LVM?
16. What is the difference between INIT & systemd systems for OS initiallization?
17. What are the major differences between RHEL 6 & RHEL 7?