LFCS Online Practice Questions and Answers

What is true about the ntpdate command?

A. It is the primary management command for the NTP time server.

B. It updates the local system's date (i.e. day, month and year) but not the time (i.e. hours, minutes, seconds).

C. It queries one or more NTP time servers and adjusts the system time accordingly.

D. It sends the local system time to one or many remote NTP time servers for redistribution.

E. It can be used by any user to set the user clock independently of the system clock.

In a nested directory structure, which find command line option would be used to restrict the command to searching down a particular number of subdirectories?

A. -dirmax

B. -maxdepth

C. -maxlevels

D. -n

E. -s

A user accidentally created the subdirectory \dir in his home directory. Which of the following commands will remove that directory?

A. rmdir '~/\dir'

B. rmdir "~/\dir"

C. rmdir ~/'dir'

D. rmdir ~/\dir

E. rmdir ~/\\dir

Which of the following options for the kernel's command line changes the systemd boot target to rescue.target instead of the default target?

A. systemd.target=rescue.target

B. systemd.runlevel=rescue.target

C. systemd.service=rescue.target

D. systemd.default=rescue.target

E. systemd.unit=rescue.target

Whichof the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)

A. shutdown -R 1 now

B. shutdown -single now

C. init 1

D. telinit 1

E. runlevel 1

Which of the following environment variables overrides or extends the list of directories holding shared libraries?

A. LD_LOAD_PATH

B. LD_LIB_PATH

C. LD_LIBRARY_PATH

D. LD_SHARE_PATH

E. LD_RUN_PATH

Which of the following steps prevents a user from obtaining an interactive login session?

A. Run the command chsh -s /bin/false with the user name.

B. Set the UID for the user to 0.

C. Remove the user from the group staff.

D. Add the user to /etc/noaccess.

E. Create a .nologin file in the user's home directory.

Which character starts a comment line in a shell script file?

A. ;

B. *

C. #

D. /

Which of the following is a valid IPv6 address?

A. 2001:db8:3241::1

B. 2001::db8:4581::1

C. 2001:db8:0g41::1

D. 2001%db8%9990%%1

E. 2001.db8.819f..1

Which of the following commands changes the number of days before the ext3 filesystem on /dev/sda1 has to run through a full filesystem check while booting?

A. tune2fs -d 200 /dev/sda1

B. tune2fs -c 200 /dev/sda1

C. tune2fs -i 200 /dev/sda1

D. tune2fs -n 200/dev/sda1

E. tune2fs --days 200 /dev/sda1