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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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Question	Rating	View Answer
Who owns the data dictionary?		View Answer
When you create a new partition, you need to designate its size by defining the starting and ending _____________.		View Answer
What type of server is used to remotely assign IP addresses to machines during the installation process? A) SMB B) NFS C) DHCP D) FT E) HTTP		View Answer
Which two commands can you use to delete directories? A) rm B) rm -rf C) rmdir D) rd E) rd -rf		View Answer
You have the file phonenos that contains telephone numbers and names separated by a comma. You want to change each comma to a semicolon. Which of the following will accomplish this. Choose one: a. cat phonenos \| tr ',' ';' b. tr ',' ';' phonenos c. sed s/,/;/ phonenos d. tr phonenos ',' ';'		View Answer
You changed the GID of the sales group by editing the /etc/group file. All of the members can change to the group without any problem except for Joe. He cannot even login to the system. What is the problem? Choose one: a. Joe forgot the password for the group. b. You need to add Joe to the group again. c. Joe had the original GID specified as his default group in the /etc/passwd file. d. You need to delete Joe's account and recreate it.		View Answer
Each command has two types of output. There are standard output and standard __________.		View Answer
I have created a file with vi editor with -x option. #vi -x hello.sh This is an encrypted file with password. when i again open this file, it ask me to enter a password before editing it. Can i remove that password, but i dont want to delete that file.		View Answer
You have made changes to the LILO configuration file but you are not sure the changes will work. How can you test the new configuration without installing it? Choose one: a. LILO -t b. LILO -c filename c. LILO -s filename d. LILO		View Answer
What command is used to remove the password assigned to a group?		View Answer
When you back up only the files that have changed since the last backup, this is called a ______ backup. Choose one a. Partial b. Differential c. Full d. Copy		View Answer
You have created special configuration files that you want copied to each user's home directories when creating new user accounts. You copy the files to /etc/skel. Which of the following commands will make this happen? Choose one: a. useradd -m username b. useradd -mk username c. useradd -k username d. useradd -Dk username		View Answer
When booting your system after installing LILO you see LIL and then nothing happens. What could be the problem. Choose one: a. LILO loaded successfully but the kernel is corrupt. b. LILO is not installed properly. c. LILO could only complete the first stage, usually a geometry mismatch. d. LILO could not load the map file, usually media failure.		View Answer
Which first-level segment of the file system contains a majority of system and server configuration files within its subdirectories? A) /var B) /etc C) /bin D) /sbin E) /lib		View Answer
You need to create two new directories in your home directory. The first one is called /home/bob/letters and the second one is /home/bob/letters/sales. Which of the following command lines should you use? Choose one: a. mkdir /home/bob/letters/sales b. mkdir letters; mkdir sales c. mkdir letters/sales d. mkdir home/bob/letters/sales		View Answer
One of your users calls to tell you that he cannot save a new file he has created in his home directory. You check his disk quota and find that he is using less than 50 percent of the space he is allotted. What could be the problem? Choose one: a. He is presently a member of a group that has exceeded its disk space quota. b. He has not named the file correctly. c. The system is corrupt. d. He needs to specify the absolute path when naming the file.		View Answer
You search for the word prize in the file kickoff by typing grep prize kickoff. However you also find lines containing prize as part of a word such as prizes but do not find Prize. How should you change the command to find all occurrences of prize as a word and not part of a word? Choose one: a. grep -lc prize kickoff b. grep -cw prize kickoff c. grep -vi prize kickoff d. grep -iw prize kickoff		View Answer
In order to apply a filesystem to your new partitions you must format them. What command would you use to create the ext2 filesystem?		View Answer
You previously ran the find command to locate a particular file. You want to run that command again. What would be the quickest way to do this? Choose one a. fc -l find <enter> fc n b. history -l find <enter> history n c. Retype the command d. fc -n find		View Answer
Which password package should you install to ensure that the central password file couldn't be stolen easily? A) PAM B) tcp_wrappers C) shadow D) securepass E) ssh		View Answer