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Question: You are debugging a new application that is crashing. You want to watch the messages as they are being written to the log. What command should you use?
Choose one:

a. tail
b. head
c. less
d. log

Answer: Answer: a

The tail command allows you to keep a log open and see each new message as it is written to the log.

Category Linux Interview Questions & Answers - Exam Mode / Learning Mode
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Question: You are debugging a new application that is crashing. You want to watch the messages as they are being written to the log. What command should you use?
Choose one:

a. tail
b. head
c. less
d. log


Answer:

Answer: a

The tail command allows you to keep a log open and see each new message as it is written to the log. Source: CoolInterview.com



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Related Questions
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Which of the following commands will display a file one screen at a time?
Choose one:

a. less
b. page
c. tr
d. cat
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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
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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
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You have three files in the /home/ben/memos directory called letters, tom, betty. How could you determine each file's type by issuing only one command?
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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.
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Which of the following commands will show a list of the files in your home directory including hidden files and the contents of all subdirectories?
Choose one:

a. ls -c home
b. ls -aR /home/username
c. ls -aF /home/username
d. ls -l /home/username
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Which of the following commands will make your home directory your working directory.
Choose one:

a. cd
b. cd home
c. cd ..
d. cd home/username
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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.
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Which of the following items would not be important for you to record in your system documentation.
Choose one:

a. Any kernel patches you might apply.
b. Applications that are installed.
c. When did each user log on last.
d. What problems with the system you have had.
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What does the apropos command do?
Choose one:

a. It is the same as the man -f command.
b. It is the same as the man -K command.
c. It searches the short descriptions from the man pages.
d. It uses the locatedb database to answer your query.
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What command must you run to update the database used by the whatis command?
Choose one:

a. makewhatis
b. updatedb
c. make whatisdb
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You locate a command in the /bin directory but do not know what it does. What command can you use to determine its purpose.
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You suspect that you have two commands with the same name as the command is not producing the expected results. What command can you use to determine the location of the command being run?
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The whereis command is helpful in finding the location of a command as well as its related man page. What is the disadvantage of using it?
Choose one:

a. Since it searches the entire directory tree, the whereis command can take an excessive amount of time.
b. The whereis command will not find source files located on your system.
c. You have to update the whereis database in order to keep it current.
d. The whereis command only searches known directories that are hard coded into the command.
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You have a problem installing an older CD-ROM drive on one of your Linux servers. You have checked the HOWTOs and FAQs but have not found your answer. Where could you go to search the newsgroups to look for
a solution?
Choose one:

a. http://www.deja.com
b. http://www.news.com
c. http://www.linux-help.com
d. http://www.lug.com
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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
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When you install a new application, documentation on that application is also usually installed. Where would you look for the documentation after installing an application called MyApp?
Choose one:

a. /usr/MyApp
b. /lib/doc/MyApp
c. /usr/doc/MyApp
d. In the same directory where the application is installed.
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What does FAQ stand for?
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There is considerable documentation covering various tasks provided as HOWTOs. These documents are normally installed in which directory.
Choose one:

a. /etc/HOWTO
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c. /usr/HOWTO
d. /usr/lib/HOWTO
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You know that the info utility provides easier to understand documentation but you have never used it. How can you access a tutorial on using info?
Choose one:

a. man info
b. info
c. info info
d. info help
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