Which user-level program, when manually executed by the root user, is used to change the runlevel of the system? (Provide only the command with no additional options or parameters)
A. init
While editing a file in vi, you realize that you are changing the wrong file. What vi command sequence will allow you to quit without saving your changes?
A. :Q!
B. :q!
C. :w!
D. :wq!
________ /dev/sda3 will create a swap area on the device/dev/sda3.
A. mkswap
B. /sbin/mkswap
You are writing text in vi. Now you want to save your changes and exit. Which TWO sequence of inputs will accomplish this?
A. esc ZZ
B. ctrl :w!
C. esc zz
D. esc :wq!
E. ctrl XX
Which option to the tee command will cause the output to be concatenated on the end of the output file instead of overwriting the existing file contents?
A. -a
B. -c
C. -no-clobber
D. -continue
What does the + symbol mean in the following grep regular expression: grep '^d[aei]\+d$' /usr/share/dict/ words
A. Match the preceding character set ([aei]) one or more times.
B. Match the preceding character set ([aei]) zero or more times.
C. Match the preceding character set ([aei]) zero or one times.
D. Match a literal + symbol.
The dpkg-____ command will ask configuration questions for a specified package, just as if the package were being installed for the first time. Answer:
A. reconfigure
What is the purpose of the Bash built-in export command?
A. To allow disks to be mounted remotely.
B. To automate the export of variables for subsequently executed commands.
C. To make the command history available to sub-shells.
D. To run a command as a process in a sub-shell.
E. To save variable settings for future shell invocations.
What umask value will result in the default access permissions of 600 (rw-------) for files and 700 (rwx ------) for directories? (Provide only the numerical umask value)
A. 0077
What command will display all of the background tasks running in the current shell?
A. history
B. jobs
C. kill -l
D. list
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