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Mr Wallace

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Submitted By IykeMadeIt
Words 2616
Pages 11
Guide to Linux+ (2nd Edition)
ISBN 0-619-21621-2
End of Chapter Solutions

Chapter 8 Solutions

Review Questions

1. Because Standard Error and Standard Ouput represent the results of a command and Standard Input represents the input required for a command, only Standard Error and Standard Ouput can be redirected to/from a file. True or False? Answer: False 2. Before a user-defined variable can be used by processes that run in subshells, that variable must be __________. a. imported b. validated by running the env command c. exported d. redirected to the BASH shell Answer: c

3. The alias command can be used to make a shortcut to a single command. True or False? Answer: True 4. Which of the following files is always executed immediately after a user logs in to a Linux system and receives a BASH shell? a. /etc/profile b. ~/.bash_profile c. ~/.bash_login d. ~/.profile Answer: a

5. Which command could you use to see a list of all environment and user-defined shell variables as well as their current values? a. ls /var b. env c. set d. echo Answer: c

6. Every if construct begins with if and must be terminated with? a. end b. endif c. stop d. fi Answer: d

7. Which of the following will display the message welcome home if the cd /home/user1 command is successfully executed? a. cd /home/user1 && echo “welcome home” b. cat “welcome home” || cd /home/user1 c. cd /home/user1 || cat “welcome home” d. echo “welcome home” && cd /home/user1 Answer: a

8. The current value for the HOME variable is displayed by which of the following commands? (Choose all that apply.) a. echo HOME= b. echo ~

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