Linux Interview Questions and Answers part2

1. You are tasked to build a new Linux workstation. User wants to install a word processor and spreadsheets that offers a similar version for Microsoft Windows system. Which office suite should you install?

Ans:- You should use Apache OpenOffice. Its free and open source project. And works fine on both Window and Linux systems.

2. A technician uses the ps command to see what processes are running. When the current running processes are shown, he notices a process that he terminated 10 minutes ago by using the kill command is still running. What command should he use next to terminate this process?

Ans:- He should use -9 argument with kill command that will send a kill signal to the process. This will terminate the specific process immediately.

3. A technician quickly notices a kernel error message on the screen during the boot process. Unfortunately, the error message disappear so quickly for the technician to read it all. What log directory can the technician use to examine boot-time messages?

Ans:- Linux system keeps almost all log files under the /var/log directory. Most of the boot messages 

are kept in buffer, which can be accessed by using the dmesg command. He can examine the /var/log/dmesg.log file. For boot time message he can also check the /var/log/boot.log file.

4. A technician wants to view a list of all running processes on the server. How can he do this?

Ans:- He should use the ps command with -ef argument. ps -ef command will show a list of all running process.

5. Where inittab file is located?

Ans:- Default location of inittab file is /etc directory. This file describes which process would be start at boot time.

6. A technician want to boot the system in CLI mode on start up. Which runlevel should he assign and in which file ?

Ans:- He could assign runlevel 3 as the default runlevel in /etc/inittab file.

7. What program a technician can use to analyze program’s core dump files and to debug the application while it is actually running?

Ans:- He can use gdb program to analyze program’s core dump files and also debug the application while it is actually running.

8. As a technician you want to shutdown the Linux system. What command should you use?

Ans:- You could use shutdown command. shutdown -h now

9.  As a technician you need to perform a scheduled shutdown that will occur in 10 minutes. What should you use to shut down the server in 10 minutes.?

Ans:- You can use -h argument with shutdown command which allows you to specify the time in second. To shutdown the system in 10 minute you should run shutdown -h 600 command.

10. What command will halt the system?

Ans:- halt will halt the system.

11. As a technician you need to restart the Apache Web Server. What command should you use.?

Ans:- You could use following command to restart the Apache web server.

#service httpd restart    or /etc/init.d/httpd restart

12. Which command will restart the FTP Server?

Ans:- #service vsftpd restart  or /etc/init.d/vsftpd restart

Above command will restart the FTP server.

13. What line printer control command is used to control the operation of the line printer system?

Ans:- lpc command is used with various argument to control the operations of line printer system.

14. A technician wants to terminate an active spooling daemon on the local host immediately and then disables printing for the specified printers. What command should he use?

Ans:- He should use lpc command with abort options. lpc abort lpc abort terminates an active spooling daemon on the local host immediately and then disables printing for the specified printers,

15. What print command stops a spooling daemon after the current job completes and disables printing?

Ans:- The lpc stop command stops a spooling daemon after the current job completes and disables printing

16. What command allows you to directly see what jobs are currently in a printer queue?

Ans:- The lpc command allows you to directly see what jobs are currently in a printer queue

17. A technician wants to halt the Linux server. What command should he use ?

Ans:- He can use init 0 command to halt the Linux server.

18. What line printer command lets you remove print jobs from the printer queue?

Ans:- The lprm command will let you remove print jobs from the printer queue.

19. What is the default text editor of Linux which include almost every version of Linux?

Ans:- Default editor of Linux is vi editor that can used to edit any ASCII text.

20. What command is used for combining a large number of files into one single file for archival to tape?

Ans:- vi is a text editor that can be used to edit any ASCII text. It is especially useful for editing programs.

21. Where do all your configurations for your services, programs, and daemons reside by default?

By default, all configurations for your services, programs, and daemons reside in the /etc directory.

22. What type of backup tape will only back up files that have changed since the previous backup and clear the archive bit?

Ans:- An Incremental backup will backup only files that have changed since the previous backup and clear the archive bit.

23. Which argument is used with tar command to create a new archive file?

-c argument is used to create new archive file.

24. Which argument is used with tar command to extract the files from archive ?

Ans:-  x argument is used with tar command to extract the files form archive.

25. What is default name of super or administrator account name in Linux?

Ans:- Super or administrator account in Linux is known as root user.