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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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In your present working directory, you have the files maryletter memo1 MyTelephoneandAddressBook What is the fewest number of keys you can type to open the file MyTelephoneandAddressBook with vi? Choose one a. 6 b. 28 c. 25 d. 4		View Answer
When formating your partition with the mkfs command, you must also pass to the command the type of filesystem and the number of __________?		View Answer
You have made changes to the /etc/inittab file after installing your UPS. How do you institute these configuration changes without having to reboot your computer or have your users log off? Choose one: a. Issue the command source /etc/inittab. b. Change the runlevel to single user mode. c. Issue the init q command. d. The init daemon only reads its configuration file during boot.		View Answer
What would you type to send the last 20 lines of a text file to STDIN? A) end -n 20 filename B) last -n 20 filename C) head -20 filename D) end -20 filename E) tail -20 filename		View Answer
You are using tar to create a tarfile of the files contained in the /home/bob/memos directory. After making the /home/bob/memos directory your working directory, which of the following commands will create the file? Choose one: a. tar cf memos.tar . b. tar xf memos.tar . c. tar cf memos.tar /home/bob/memos d. tar xf memos.tar /home/bob/memos		View Answer
You have made changes to the /etc/syslog.conf file. Which of the following commands will cause these changes to be implemented without having to reboot your computer? Choose one: a. kill SIGHINT `cat /var/run/syslogd.pid` b. kill SIGHUP `cat /var/run/syslogd.pid` c. kill SIGHUP syslogd d. kill SIGHINT syslogd		View Answer
Which file do you edit to set up a printer? A) /etc/printtab.conf B) /etc/print.conf C) /etc/lp.conf D) /etc/printtab E) /etc/printers		View Answer
Which of the following Web sites would you go to in order to keep up with the latest Linux security information? [Choose all correct answers] A) http://www.ilda.org/ B) http://www.cert.org/ C) http://www.ciac.org/ D) http://www.sans.org/ E) http://www.lsfa.org/		View Answer
What can you type at a command line to determine which shell you are using?		View Answer
You issue the following command useradd -m bobm But the user cannot logon. What is the problem? Choose one: a. You need to assign a password to bobm's account using the passwd command. b. You need to create bobm's home directory and set the appropriate permissions. c. You need to edit the /etc/passwd file and assign a shell for bobm's account. d. The username must be at least five characters long.		View Answer
You want to print out a text file called vacations however the lines are of varying length. What text filter could you use to even out the length of the lines?		View Answer
You have installed a new UPS (Uninterruptable Power Supply) and the powerd daemon. Which file should you use to define the steps to be taken in the case of a power failure? Choose one: a. /etc/ups.conf b. /etc/inittab c. /etc/power.conf d. /etc/conf.ups		View Answer
Bob has created a new directory that will contain files that he and seven other users will be using for a new project. These eight users are the only members of the kickoff group. What does Bob need to do to give these users access to these files. Choose one: a. Change the group on the new directory to kickoff using the chgrp command. b. Make each of the other seven users the owner of the files as they are created. c. Give the others group the read and write permission to the directory. d. Place the files in the ftp directory so each user can copy them to his own home directory.		View Answer
What command can you use to see the boot messages? Choose one: a. dmesg b. cat kernel.messages c. logview d. man logs		View Answer
Which of the following would improve your ability to provide user support? Choose one: a. Create a directory containing instructions for using all installed applications. b. Email your user's your office hours. c. Whenever a user has a problem, fix it and leave. d. Use as much technical language as possible when explaining what went wrong.		View Answer
Of the following technologies, which is considered a client-side script?		View Answer
Several of your users have been scheduling large at jobs to run during peak load times. How can you prevent anyone from scheduling an at job? Choose one: a. delete the file /etc/at.deny b. create an empty file called /etc/at.deny c. create two empty files: /etc/at.deny and /etc/at.allow file d. create an empty file called /etc/at.allow		View Answer
In order to display the last five commands you have entered using the history command, you would type ___________.		View Answer
Which of the following lines in your /etc/syslog.conf file will cause all critical messages to be logged to the file /var/log/critmessages? Choose one: a. .=crit /var/log/critmessages b. crit /var/log/critmessages c. =crit /var/log/critmessages d. .crit /var/log/critmessages		View Answer
Which of the following cannot be accomplished with the cat command? Choose one: a. Create a new file b. Display the contents of a file c. Append information to another file d. Change the contents of a file		View Answer