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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 partitions might you create on the mail server's hard drive(s) other than the root, swap, and boot partitions? [Choose all correct answers] A) /var/spool B) /tmp C) /proc D) /bin E) /home		View Answer
If you type the command cat dog 1> cat 2> horse where would the output be sent? Choose one: a. Any error messages would be saved to the file horse and the standard output would be saved to the file cat. b. Any error messages would be saved to the file cat and the standard output would be saved to the file horse. c. The contents of the file dog and any error messages would be saved to the file horse. d. The contents of the files dog and cat would be saved to the file horse.		View Answer
In Linux How to exclude ip from the given range please help me out		View Answer
You wish to have all mail messages except those of type info to the /var/log/mailmessages file. Which of the following lines in your /etc/syslogd.conf file would accomplish this? Choose one: a. mail.;mail!=info /var/log/mailmessages b. mail.;mail.=info /var/log/mailmessages c. mail.;mail.info /var/log/mailmessages d. mail.;mail.!=info /var/log/mailmessages		View Answer
What file should you examine to determine the defined runlevels for your system?		View Answer
Please describe the main stages of a booting Linux machine (x86) to the login prompt?		View Answer
What command should you type to see all the files with an extension of 'mem' listed in reverse alphabetical order in the /home/ben/memos directory. op		View Answer
You issue the command ls -l memos and get the following output -rw-rw-r-- 1 bob users 17249 Sep 7 10:08 accounting -rw-rw-r-- 1 bob users 7202 Sep 17 9:10 administration -rw-rw-r-- 1 root users 13367 Sep 1 12:58 humres -rw-rw-r-- 1 bob users 9449 Sep 22 7:34 sales Bob opens the humres file and makes changes, however, he is unable to save the file after making changes. What is the problem? Choose one: a. Bob is not a member of the users group and only has read access. b. Bob's quota has been exceeded. c. Only the owner of a file can make changes to it. d. The file humres is corrupted and he needs to save his changes to another file.		View Answer
When you issue the command ls -l, the first character of the resulting display represents the file's ___________.		View Answer
You attempt to use shadow passwords but are unsuccessful. What characteristic of the /etc/passwd file may cause this?		View Answer
What command should you use to check the number of files and disk space used and each user's defined quotas?		View Answer
Which of the following commands will combine the contents of the files tom and betty into a new file called friends? Choose one: a. ls tom betty > friends b. cat tom betty > friends c. more tom betty >> friends d. cat tom; cat betty > friends		View Answer
What file contains the default environment variables when using the bash shell? Choose one: a. ~/.profile b. /bash c. /etc/profile d. ~/bash		View Answer
Which one of the following factors does not play a role in choosing the type of backup media to use? Choose one: a. How frequently a file changes b. How long you need to retain the backup c. How much data needs to be backed up d. How frequently the backed up data needs to be accessed		View Answer
When you only back up one partition, this is called a ______ backup. Choose one a. Differential b. Full c. Partial d. Copy		View Answer
You wish to find the man page that discusses how to change a password. You type man password but get the message that no manual entry for password exists. What command will find the appropriate page? Choose one: a. man -C password b. man -k password c. man -c password d. man -q password		View Answer
In order to improve your system's security you decide to implement shadow passwords. What command should you use?		View Answer
You have a file called phonenos that consists of two fields per line, telephone number and name, with the fields being separated by a comma (,). You want to have a list of the names only. Which command will accomplish this? Choose one: a. cut -d, -f2 phonenos b. cut -d, -f1 phonenos c. cut -d -f2 phonenos d. cut -f2 phonenos		View Answer
What is kernel updation?		View Answer
You are entering a long, complex command line and you reach the right side of your screen before you have finished typing. You want to finish typing the necessary commands but have the display wrap around to the left. Which of the following key combinations would achieve this? Choose One a. Esc, /, Enter b. /, Enter c. ctrl-d, enter d. esc, /, ctrl-d		View Answer