Free LFCS Sample Questions — Linux Foundation Certified System Administrator

Which of the following commands displays the contents of a gzip compressed tar archive?

• A. gzip archive.tgz | tar xvf -
• B. tar ztf archive.tgz
• C. gzip -d archive.tgz | tar tvf -
• D. tar cf archive.tgz

Which of the following commands changes the ownership of file.txt to the user dan and the group staff?

• A. chown dan/staff file.txt
• B. chown dan:staff file.txt
• C. chown -u dan -g staff file.txt
• D. chown dan -g staff file.txt

Which of the following commands can be used to determine how long the system has been running? (Choose TWO correct answers.)

• A. uptime
• B. up
• C. top
• D. uname -u
• E. time –up

What is the output of the following command sequence? for token in a b c; do echo -n "$token "; done

• A. anbncn
• B. a b c
• C. "a " "b " "c "
• D. token token token
• E. abc

Which of the following commands will print the last 10 lines of a text file to the standard output?

• A. cat -n 10 filename
• B. dump -n 10 filename
• C. head -n 10 filename
• D. tail -n 10 filename

Which of the following commands updates the linker cache of shared libraries?

• A. mkcache
• B. soconfig
• C. mkldconfig
• D. lddconfig
• E. ldconfig

Which of the following commands reboots the system when using SysV init? (Choose TWO correct answers.)

• A. shutdown -r now
• B. shutdown -r "rebooting"
• C. telinit 6
• D. telinit 0
• E. shutdown -k now "rebooting"

Which of the following commands moves and resumes in the background the last stopped shell job?

• A. run
• B. bg
• C. fg
• D. back

Which SysV init configuration file should be modified to disable the ctrl-alt-delete key combination?

• A. /etc/keys
• B. /proc/keys
• C. /etc/inittab
• D. /proc/inittab
• E. /etc/reboot

Regarding the command: nice -5 /usr/bin/prog Which of the following statements is correct?

• A. /usr/bin/prog is executed with a nice level of -5
• B. /usr/bin/prog is executed with a nice level of 5
• C. /usr/bin/prog is executed with a priority of -5
• D. /usr/bin/prog is executed with a priority of 5

Which of the following commands will write a message to the terminals of all logged in users?

• A. bcast
• B. mesg
• C. print
• D. wall
• E. yell

Immediately after deleting 3 lines of text in vi and moving the cursor to a different line, which single character command will insert the deleted content below the current line?

• A. i (lowercase)
• B. (uppercase)
• C. p (lowercase)
• D. (uppercase)
• E. u (lowercase)

Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)

• A. 127.0.0.0/8
• B. 10.0.0.0/8
• C. 169.255.0.0/16
• D. 172.16.0.0/12
• E. 192.168.0.0/16

Instead of supplying an explicit device in /etc/fstab for mounting, what other options may be used to identify the intended partition? (Choose TWO correct answers.)

• A. FIND
• B. ID
• C. LABEL
• D. NAME
• E. UUID

Which of the following commands will change the quota for a specific user?

• A. edquota
• B. repquota
• C. quota -e
• D. quota

Which of the following is the device file name for the second partition on the only SCSI drive?

• A. /dev/hda1
• B. /dev/sda2
• C. /dev/sd0a2
• D. /dev/sd1p2

Which character, added to the end of a command, runs that command in the background as a child process of the current shell?

• A. !
• B. +
• C. &
• D. %
• E. #

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 kernel parameters instructs the kernel to suppress most boot messages?

• A. silent
• B. verbose=0
• C. nomesg
• D. quiet

Which of the following statements is correct when talking about /proc/?

• A. All changes to files in /proc/ are stored in /etc/proc.d/ and restored on reboot
• B. All files within /proc/ are read-only and their contents cannot be changed
• C. All changes to files in /proc/ are immediately recognized by the kernel
• D. All files within /proc/ are only readable by the root user