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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
Which command works in almost all distributions to create a boot disk? A) mkboot B) make bootdsk C) make boot D) mkbootdsk E) mkbootdisk		View Answer
What command can you use to review boot messages?		View Answer
Where are the startup scripts defined? Choose one: a. /etc/initd b. /etc/scripts c. /etc/start d. /etc/inittab		View Answer
You notice that your server load is exceptionally high during the hours of 10 am to 2 noon. When investigating the cause, you suspect that it may be a cron job scheduled by one of your users. What command can you use to determine if your suspicions are correct? Choose one: a. crontab -u b. crond -u c. crontab -l d. crond -l		View Answer
You want to know how many lines in the kickoff file contains 'prize'. Which of the following commands will produce the desired results? Choose one: a. grep -n prize kickoff b. grep -c prize kickoff c. grep -v prize kickoff d. grep prize kickoff		View Answer
What is the name and path of the default configuration file used by the syslogd daemon?		View Answer
You have installed a new application but when you type in the command to start it you get the error message Command not found. What do you need to do to fix this problem? Choose one a. Add the directory containing the application to your path b. Specify the directory's name whenever you run the application c. Verify that the execute permission has been applied to the command. d. Give everyone read, write and execute permission to the application's directory.		View Answer
You create a new user account by adding the following line to your /etc/passwd file. bobm:baddog:501:501:Bob Morris:/home/bobm:/bin/bash Bob calls you and tells you that he cannot logon. You verify that he is using the correct username and password. What is the problem? Choose one: a. The UID and GID cannot be identical. b. You cannot have spaces in the line unless they are surrounded with double quotes. c. You cannot directly enter the password; rather you have to use the passwd command to assign a password to the user. d. The username is too short, it must be at least six characters long.		View Answer
You enter the command cat horse \| tr 'x' 'X'. What is the result of this command? Choose one: a. The file horse will be displayed to the screen. b. Any lines in the file horse containing 'x' or 'X' will be displayed to the screen c. All instances of 'x' will be changed to 'X' and the output sent to the screen. d. All instances of 'x' will be changed to 'X' and the output written to the file called horse.		View Answer
You attempt to delete a file called sales.mem using the rm command but the command fails. What could be the problem? Choose one: a. You do not have delete rights to the file called sales.mem. b. You need to use the -i option with rm to delete a file. c. You do not have write rights to the directory containing the sales.mem file. d. You are not the owner of the file sales.mem.		View Answer
You copy a file to Bob's home directory that Bob needs to revise. However, when Bob attempts to open the file he is unsuccessful. What command do you need to use to give Bob ownershiop of the file?		View Answer
You want to copy the user's home directories to a new location. Which of the following commands will accomplish this? Choose one: a. cp -rP /home/* newdir b. cp -i /home/* newdir c. cp -iv /home/* newdir d. cp -b /home/* newdir		View Answer
Hi All, I need a help it's bit urgent. I have a linux box and a sendmail mail server has been configured. The porblem is i want to send a mail delay status to the user stating that his mail is still in the queue for 1 hour using shell scripting or any third party tool. please help me if any body knows about it. Thanks, Harish.T		View Answer
What should you type to change the runlevel of your system? Choose one: a. init [runlevel] b. halt [runlevel] c. /etc/inittab d. sys init [runlevel]		View Answer
You want to find how to set the manpath variable so you type man man. What would you type while displaying the page to find the location where manpath is discussed? Choose one: a. grep manpath b. find manpath c. /manpath d. locate manpath		View Answer
In order to create a file called DirContents containing the contents of the /etc directory you would type ____________.		View Answer
What utility can you use to automate rotation of logs?		View Answer
You issue the command mount without any options and the following output is displayed /dev/hda1 on / type ext2 (rw) none on /proc type proc (rw) /dev/hda9 on /home type ext2 (rw) /dev/hda7 on /tmp type ext2 (rw) /dev/hda5 on /usr type ext2 (rw) /dev/hda6 on /var type ext2 (rw) What does this output mean? Choose one: a. This is a listing of all the available filesystems that may be mounted on your system and is taken from the /etc/fstab file. b. This is a listing of all the mounted filesystems on your system and is taken from the /etc/mtab file. c. This is a listing of all the available filesystems that may be mounted on your system and is taken from the /etc/mtab file. d. This is a listing of all the mounted filesystems on your system and is taken from the /etc/fstab file.		View Answer
You want to create a compressed backup of the users' home directories. What utility should you use?		View Answer
You need to update your HOWTOs. Where should you go to acquire the latest versions? Choose one: a. Linux Mall and order a new CD. b. Your local Linux Users Group should have a copy. c. The web site for your distribution. d. Linux Documentation Project		View Answer