101-500 Online Practice Questions and Answers

FILL BLANK

Which command displays a list of all background tasks running in the current shell? (Specify ONLY the command without any path or parameters.)

A. jobs

The system is having trouble and the engineer wants to bypass the usual /sbin/init start up and run /bin/sh. What is the usual way to pass this change to the kernel from your boot loader?

A. Start in runlevel 1.

B. Pass init=/bin/sh on the kernel parameter line.

C. Pass /bin/sh on the kernel parameter line.

D. Pass start=/bin/sh on the kernel parameter line.

After modifying GNU GRUB's configuration file, which command must be run for the changes to take effect?

A. kill -HUP $(pidof grub)

B. grub-install

C. grub

D. No action is required

Which of the following apt-get commands will install the newest versions of all currently installed packages without removing any packages or installing new packages that are not already installed?

A. auto-update

B. upgrade

C. dist-upgrade

D. install

E. update

Which variable defines the directories in which a Bash shell searches for executable commands?

A. BASHEXEC

B. BASHRC

C. PATH

D. EXECPATH

E. PATHRC

After successfully creating a hard link called bar to the ordinary file foo, foo is deleted from the filesystem. Which of the following describes the resulting situation?

A. foo and bar would both be removed.

B. foo would be removed while bar would remain accessible.

C. foo would be removed. bar would still exist but would be unusable.

D. Both foo and bar would remain accessible.

E. The user is prompted whether bar should be removed, too.

Which of the following are modes of the vi editor? (Choose two.)

A. edit mode

B. insert mode

C. change mode

D. review mode

E. command mode

Which of the following are filesystems which can be used on Linux root partitions? (Choose two.)

A. NTFS

B. ext3

C. XFS

D. VFAT

E. swap

Which chown command will change the ownership to dave and the group to staff on a file named data.txt?

A. chown dave/staff data.txt

B. chown dave staff data.txt

C. chown --user dave --group staff data.txt

D. chown dave:staff data.txt

What output will be displayed when the user fred executes the following command? echo `fred $USER'

A. fred fred

B. fred /home/fred/

C. `fred $USER'

D. fred $USER

E. `fred fred'