INTERVIEW QUESTIONS FOR LINUX ADMIN

Name: V V S GUPTA
email ID: lvvs.gupta@hotmail.com








Interview stuff:

Cromton Interview Questions

1. Difference between RHEL 4 & RHEL 5.
2. What is RAID and what is RAID 5
3. If a user (simon) is created in FTP and a directory in any location of the disk, that particular directory should be used for the user simon itself. He should not have other access.
4. How to deny a network in web server & what do you write and where do you write in the configuration file.
5. If I want to create more than 2 web pages what is the procedure and how do you configure the file.


Zeta Interactive

1. What is the Linux Booting Process?
2. How do you compile a Kernel?
3. What are Run Levels? Name them
4. What is NFS and which file do you configure for NFS.
5. What are the Records stored in DNS.
6. What are TCP wrappers?


Precession Informatics

1. What is the port no of Telnet & SSH & Apache
2. What is the difference between Telnet and SSH.
3. If at all I need to restrict a user remotely how can I do this?
4. What is the package you install for NIS? (Server side)
5. What is LDAP
6. What are the services to be restarted for NFS
7. Why do we restart Portmap Service?
8. Why do we add no_root_squash in NFS?
9. If we want to change the port no for Apache where I need to change it. Whether it will work if I do so
10. What is the default permission for ‘tmp’ directory
11. Where do we see the log messages
12. If we have 5 users and a group called ‘system’ and I have a directory where I will create a file then I need to obtain my group owner as the user name
13. Why do we use sticky Bit and what is the syntax.


Oracle

1. What s initrd file?
2. How do you install kernel
3. How to find the which ports opened
4. What are the commands used to check which all process running?
5. Explain Raid 5
6. How to find what interfaces available
7. How to assign IP Address through command line.
8. What are the troubleshooting command used till now
9. What are the service to be restarted for NFS
10. what are the daemons for NFS
11. Knowledge in Back & Restore
12. How to check what services are running apart form /etc/init.d/ or service <name> satus
Round II

13. What is the linux Boot Process
14. what is initrd file
15. wha is the N/W bonding and how o find the interfaces which are active / deactive
16. Port number of NFS / Portmap / FTP .
17. How to find the routing
18. How to assign the routing table through command line
19. Difference between Raid 1 & Raid 5
20. what are the daemons should be running for NFS
21. how to mount NFS permanently
22. how to assign hostname for the system
23. How to extend the Logical volume
24. what is vmlinuz(in Grub.conf)
25. How to find hba car failure
26. how to find the NFS directory from client with knowing only Nfs Server IP
27. What is the command to restart the server.
28. How to allow access to the user with out password (SSH)

Round III

29. What is initrd file what is the use
30. How dns resolves
31. How to modify the User ID for a particular user
32. I have space in / and root user is not able to touch file
33. How do you harden the linux system
34. rpm –qa is not displaying rpm’s
35. what are the fields in /etc/shadow file
36. what is swap and what is the use
37. How to reduce the LVM
38. What are ACL’s