Linux Interview Questions

1. What is Reverse Proxy & transperent proxy?

2. What is difference between statefull firewall and stateless firewall ?

3. What is cifs? is it protocol or filesystem? explain

4. What is snort ?

5. what is difference between IPS & IDS ?

6. What is Crashdump?

7. What is clustering ? What are types ?

8. What is fencing and which devices are used for fencing?

9. If I give command –> ls   –> but nothing come on console.. tell me the possibilities that why this could have happened? 

10. Difference between RAID 5 & 6 ? What if 2 disks fails in RAID 5 ? Can we make RAID 5 with 5 disks?

11. How to print 1 to 100 in bash without using any loop or scripting?

12. How to stop module to load in RAM?

13. How to call one shellscript in another?

14. How to copy or to do 1 task on 100s of server in minimum time?

15. How to use 4 NICs to increase network speed?

16. tell command to write 10GB file with block size of 128k?

17. How to test network speed between Network?

18. How to do LDAP replication?

19. What is UpdateDN & BindDN in OpenLDAP?

20. How to configure HTTPS websites in Apache?

21. How to configure DNS ? What is Authorative DNS & Root DNS?

22. Which parameters to tune for better Linux performance?

23. What is NMap & why it is used?

24. How to replicate MySQL?

25. How to configure HAproxy?

26. What is tcp_syncookies?

27. Which kernel parameters to modify to increase network packet size?

Neelesh Gurjar has written 122 articles

2 thoughts on “Linux Interview Questions

  1. Kevin Lee says:

    Hi Neelesh,

    Hot! That was HOT! Glued to the Linux Interview Questions your proficiency and style!

    Unfortunately I still don’t anything about Linux, I am just a newbie.
    For what I know about Linux it is good for these kind of operation because it is fast. And also, I am interested in learning how to use it because I read that it gives you more opportunity to solve different kind of problems.
    The time to recover an ext3 file system after an unclean system shutdown does not depend on the size of the file system or the number of files; rather, it depends on the size of the journal used to maintain consistency. The default journal size takes about a second to recover, depending on the speed of the hardware.
    Great effort, I wish I saw it earlier. Would have saved my day 🙂


  2. Kevin Lee says:

    Hi Neelesh,

    Jeez oh man, while I applaud for your writing, it’s just so damn straight to the point Linux Interview Questions!

    I am new to Mandrake go I have installed it on my HP Pavilion laptop but I cannot see anything after I choose Linus in the start screen.
    These virtual files have unique qualities. Most of them are listed as zero bytes in size. Virtual files such as /proc/interrupts, /proc/meminfo, /proc/mounts, and /proc/partitions provide an up-to-the-moment glimpse of the system’s hardware.
    Could it be the Laptops screen resolution or something else?
    I hope that someone can help me.
    I look forward to see your next updates.

    Many Thanks,

Leave a Reply