Linux Interview Questions and Answer – Part 3

  1. What is SetGID, SetUID & Stickybit?
  2. Location where all the user information are stored?
  3. File where user password are stored?
  4. What is the default permission of a file?
  5. What is the significance of -rvf?
  6. What is PV, VG & LV?
  7. What are the types of file system?
  8. What is XFS?
  9. Can we reduce XFS file system?
  10. How can we extend LV?
  11. Command to check running process?
  12. Command to check RAM usage?
  13. Command to check Disk usage?
  14. Difference between ps -aux & top command?
  15. What are the ways to check CPU usage?
  16. How to check CPU details?
  17. Explain the steps to create a partition & how to format with file system?
  18. Explain the steps to create LV?
  19. Explain steps to reduce XFS & EXT files systems?
  20. Significance of .bashrc file?
  21. How you check the kernel version?
  22. How you check the Red hat release version?
  23. Significance of resolv.conf file?
  24. What is DNS? How you resolve DNS? Types of DNS records?
  25. Difference between Nginx & HTTP Server?
  26. Port no of HTTP, FTP, SSH, HTTPS?
  27. What is SSH? How you generate SSH-keys?
  28. What is Private & public key? How they authenticate?
  29. Configuration file of SSH?
  30. Configuration file of HTTP?
  31. What is Virtual Hosting? How you configure virtual hosting?
  32. Explain ifconfig command?
  33. Difference between IPv4 & IPv6?
Rajesh Kumar
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