Novell's Guide To Comptia's Linux+ Chapter 6

Front 1

1) Which of the following are valid shells that are available in Linux?

Back 1

a) /bin/bash c)/bin/ksh d) /bin/tcsh

Front 2

2) Which of the following files are executed when you start another shell following login?

Back 2

c) ~/.bashrc

Front 3

3) Which of the following files could you edit to create a variable that must exist in all shells that are started by users on your system?

Back 3

b) /etc/profile

Front 4

4) You have just edited your ~/.bashrc file and added a line that loads a variable. How can you read this file into your current shell environment?

Back 4

a) .~/.bashrc d) source~/.bashrc

Front 5

5) Which of the following may be used to protect the $ character in the phrase $DIR from being interpreted specially by the bash shell?

Back 5

a) \$DIR b) '$DIR'

Front 6

6) You wish to recall a previous command that starts with the letters "cron". After you type the letters "cron" on the command line, what key combination could you use to search the command history for previous commands that start with "cron"?

Back 6

Ctrl + R

Front 7

7) Which key may be used to complete the name of a file or directory on the command line?

Back 7

b) tab

Front 8

8) Which of the following commands can be used to view the contents of the $NOVELL variable?

Back 8

b) echo $NOVELL

Front 9

9) What command could you use to create a variable called TEST that is available to child processes in subshells?

Back 9

export TEST= "test"

Front 10

10) What function call is used by a shell to create a subshell for program execution?

Back 10

export

Front 11

11) Which of the following commands may be used to view all shell and environment variables on the system?

Back 11

c)set

Front 12

12) What command could you use to create an alias called c that runs the clear command in your current shell?

Back 12

alias c = 'clear'

Front 13

13) Which of the following files are best suited to storing aliases?

Back 13

b)~/.aliases d) /etc/bash.bashrc

Front 14

14) Which command can be used to view all files in the /etc directory that are three characters long and start with either A or B?

Back 14

a) Is /etc/[AB]??

Front 15

15) Which of the following output redirection symbols will not overwrite an existing file?

Back 15

d)>>

Front 16

16) What command could you enter at a command prompt to view a long listing of files in the /proc directory and save the stdout and stderr to the file results in your current directory?

Back 16

cat /proc

Front 17

17) Which of the following demonstrates correct syntax?

Back 17

b) command > file d) command|command

Front 18

18) Which device file can you redirect stderr in order to ignore stderr completely?

Back 18

/dev/null

Front 19

Which of the following will run the command echo "I found it!" only if the command grep localhost /etc/hosts is successful?

Back 19

d. grep localhost /etc.hosts || echo "I found it!"

Front 20

What command accepts information from stdin and sends it to both a file and stdout?

Back 20

tee

Front 21

21) which key can you use to switch from command mode to insert mode in the vi editor?

Back 21

b) i or INSERT

Front 22

22) Which key sequence in the vi editor will allow you to save your changes and quit?

Back 22

a) :wq c):x

Front 23

23) What sed command would you use to replace all occurences of the word mom with dad in the file letter?

Back 23

sed 's/mom/dad/g' /letter

Front 24

24) What sed command would you use to delete all lines that begin with a # character in the file /etc/samba/smb.conf?

Back 24

sed 'd

Front 25

25) What awk command would you use to print the third and fifth fields of the colon delimited /etc/passwd file?

Back 25

awk 'BEGIN {FS = ":"}{print NR, $3, $5} END