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	Linux Interview Questions & Answers Below we have listed all the Linux Interview Questions and answers. Feel free to comment on any Linux Interview Questions or answer by the comment feature available on the page. To buy an eBook containing 30,000 Interview Questions, with Answers, Click Here. View All Linux Interview Questions & Answers - Exam Mode / Learning Mode
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Linux is, in simplest terms, an operating system. It is the software on a computer that enables applications and the computer operator to access the devices on the computer to perform desired functions. The operating system (OS) relays instructions from an application to, for instance, the computer's processor. Linux (often pronounced LIH-nuhks with a short "i") is a Unix-like operating system that was designed to provide personal computer users a free or very low-cost operating system comparable to traditional and usually more expensive Unix systems.

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You cannot mount /dev/hdb1 and suspect that the superblock is bad. How do you fix this? Choose one: a. Use the mkfs command. b. Use the fsck command with the -f option. c. Use the e2fsck to replace the superblock with a copy saved to another location on your disk. d. Restore the superblock from your tape backup.		View Answer
You copy the administration directory to George's home directory. -rw-rw--w- 1 root admin 7202 Sep 17 9:10 administration The only group that George is a member of is users. He calls you to say he cannot list the contents of the administration directory. Why can't he look at its contents since it is in his home directory? Choose one: a. In order to view the contents of a directory, you must have read permission. George only has write permission. b. Only the owner of a directory can list its contents. c. George needs to change his default group to admin. d. George needs to make himself the owner of the administration directory.		View Answer
What would be the result of issuing the command cat phonenos? Choose one: a. The file phonenos would be displayed in reverse order with the last line shown first. b. The first word of each line of the file phonenos would be displayed. c. The file phonenos would be displayed in reverse order with the last line shown first and a newline character added at the end of each line. d. The file phonenos would be displayed with each line numbered in reverse order with the last line shown first.		View Answer
What are threads (user/kernel)?		View Answer
Which of the following statements is not true of LILO? Choose one: a. It can be used on a floppy to boot Linux. b. It must replace the master boot record on your hard drive. c. It will work with other operating systems such as DOS and Windows. d. It can specify up to 16 different boot images.		View Answer
What command must you run to update the database used by the whatis command? Choose one: a. makewhatis b. updatedb c. make whatisdb d. The database is updated automatically.		View Answer
You want to enter a series of commands from the command-line. What would be the quickest way to do this?		View Answer
Many factors are taken into account when planning a backup strategy. The one most important one is how often does the file ____________.		View Answer
Modules are pieces of kernel code that you can load or unload. What file do you use to pass parameters to a module? Choose one: a. /etc/conf.mod b. /etc/modules c. /etc/inittab d. /etc/conf.modules		View Answer
When planning your backup strategy you need to consider how often you will perform a backup, how much time the backup takes and what media you will use. What other factor must you consider when planning your backup strategy? _________		View Answer
You want to enter a series of commands from the command-line. What would be the quickest way to do this? Choose One a. Press enter after entering each command and its arguments b. Put them in a script and execute the script c. Separate each command with a semi-colon (;) and press enter after the last command d. Separate each command with a / and press enter after the last command		View Answer
You have a directory with the following permissions drw-rw--w- 1 root admin 7202 Sep 17 9:10 administration and need to give everyone except root read only access to it. Which of the following commands will accomplish this? Choose one: a. chmod uo=r administration b. chmod ug+r administration c. chmod uo+r administration d. chmod ug=r administration		View Answer
You wish to create a link to the /data directory in bob's home directory so you issue the command ln /data /home/bob/datalink but the command fails. What option should you use in this command line to be successful.		View Answer
You know that there should be 1,233 entries in the phonenos file and that each entry in on a separate line. What utility can you use to verify that the file contains 1,233 lines?		View Answer
Does Linux Support USB Devices?		View Answer
What utility can you use to show a dynamic listing of running processes? __________		View Answer
What is UserLabel Thread?		View Answer
You would like to temporarily change your command line editor to be vi. What command should you type to change it?		View Answer
The maximum size of the swap partition is _______ MB.		View Answer
You have a technician who will come in after hours to install new hardware in your system. You do not want to give him the root password, but he needs to be able to shutdown the system. How can you accomplish this? Choose one: a. You cannot do this; only root can run the shutdown command. b. Add his username to the /etc/shutdown.conf file. c. Add his username to the /etc/shutdown.allow file. d. Give him the root password and change it when you arrive the next morning.		View Answer