LPI LINUX ESSENTIALS (010-160) COMPLETE EXAM PREP
GUIDE: 125 PRACTICE QUESTIONS WITH VERIFIED ANSWERS
AND DETAILED EXPLANATIONS
SECTION 1: COMMAND LINE BASICS
Question 1: Which command is used to search for programs in
restricted locations, such as binary file directories, libraries, and man
pages?
A. find
B. locate
C. whereis
D. which
Correct Answer: C
Explanation: The whereis command is specifically designed to locate binary files,
source files, and manual pages for a given program. It searches in a restricted set
of standard locations (like /bin, /sbin, /usr/bin, /usr/share/man) rather than the
entire filesystem. This makes it fast but limited to program-related files. In
contrast, find searches the entire filesystem but is slower, locate uses a database
but finds all files, and which only finds executables in the PATH.
,Question 2: A user needs to quickly find all files containing the string
"passwd" in their name. Which command is fastest for this task?
A. find / -name "passwd"
B. grep -r passwd /
C. locate passwd
D. whereis passwd
Correct Answer: C
Explanation: The locate command searches a pre-built database of all filenames
on the system, which is typically updated daily by the updatedb command. This
allows locate to return results almost instantly. In contrast, find must traverse the
entire filesystem in real time, which can take minutes. grep searches inside files,
not filenames, and whereis only searches for programs. Therefore, locate is the
fastest option for finding files by name.
Question 3: What command updates the system-managed database
used by locate?
A. updatedb
B. updatelocate
C. find --update
D. dbupdate
Correct Answer: A
Explanation: The updatedb command is used to update the database that locate
relies on. This database contains a list of all files and directories on the system.
Typically, updatedb is run automatically once per day via a cron job. If you create
new files and want locate to find them immediately, you must manually run
updatedb (often with sudo) to refresh the database.
,Question 4: Which command displays the current working directory?
A. ls
B. cd
C. pwd
D. echo $PATH
Correct Answer: C
Explanation: The pwd command stands for "print working directory." When
executed, it outputs the absolute path of the directory you are currently in. The ls
command lists files, cd changes directories, and echo $PATH displays the system's
search path for executables. None of these show your current location.
Question 5: A user wants to change into their own home directory.
Which two commands will accomplish this? (Choose two.)
A. cd ~
B. cd /
C. cd $HOME
D. cd ..
Correct Answers: A and C
Explanation: The tilde (~) character is a shell shortcut that expands to the current
user's home directory. The environment
variable 𝐻𝑂𝑀𝐸𝑎𝑙𝑠𝑜𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑠𝑡ℎ𝑒𝑓𝑢𝑙𝑙𝑝𝑎𝑡ℎ𝑡𝑜𝑡ℎ𝑒ℎ𝑜𝑚𝑒𝑑𝑖𝑟𝑒𝑐𝑡𝑜𝑟𝑦. 𝐵𝑜𝑡ℎ𝑐𝑑 𝑎𝑛𝑑𝑐𝑑
HOME will take you there. The command cd / takes you to the root directory, and
cd .. moves you up one level to the parent directory.
, Question 6: Which command changes the current directory to the
parent directory?
A. cd ..
B. cd .
C. cd ~
D. cd /
Correct Answer: A
Explanation: The double dot (..) is a special directory entry that represents the
parent of the current directory. Running cd .. moves you up one level in the
filesystem hierarchy. The single dot (.) represents the current directory, the tilde
(~) represents the home directory, and the slash (/) represents the root directory.
Question 7: Which command changes the current directory to /etc?
A. cd etc
B. cd /etc
C. cd ~/etc
D. cd ./etc
Correct Answer: B
Explanation: The slash (/) at the beginning of /etc indicates an absolute path
starting from the root directory. This will take you directly to the etc directory
regardless of your current location. The other options use relative paths: cd etc
looks for an etc subdirectory inside your current directory, cd ~/etc looks for etc
inside your home directory, and cd ./etc also looks for etc inside your current
directory.
GUIDE: 125 PRACTICE QUESTIONS WITH VERIFIED ANSWERS
AND DETAILED EXPLANATIONS
SECTION 1: COMMAND LINE BASICS
Question 1: Which command is used to search for programs in
restricted locations, such as binary file directories, libraries, and man
pages?
A. find
B. locate
C. whereis
D. which
Correct Answer: C
Explanation: The whereis command is specifically designed to locate binary files,
source files, and manual pages for a given program. It searches in a restricted set
of standard locations (like /bin, /sbin, /usr/bin, /usr/share/man) rather than the
entire filesystem. This makes it fast but limited to program-related files. In
contrast, find searches the entire filesystem but is slower, locate uses a database
but finds all files, and which only finds executables in the PATH.
,Question 2: A user needs to quickly find all files containing the string
"passwd" in their name. Which command is fastest for this task?
A. find / -name "passwd"
B. grep -r passwd /
C. locate passwd
D. whereis passwd
Correct Answer: C
Explanation: The locate command searches a pre-built database of all filenames
on the system, which is typically updated daily by the updatedb command. This
allows locate to return results almost instantly. In contrast, find must traverse the
entire filesystem in real time, which can take minutes. grep searches inside files,
not filenames, and whereis only searches for programs. Therefore, locate is the
fastest option for finding files by name.
Question 3: What command updates the system-managed database
used by locate?
A. updatedb
B. updatelocate
C. find --update
D. dbupdate
Correct Answer: A
Explanation: The updatedb command is used to update the database that locate
relies on. This database contains a list of all files and directories on the system.
Typically, updatedb is run automatically once per day via a cron job. If you create
new files and want locate to find them immediately, you must manually run
updatedb (often with sudo) to refresh the database.
,Question 4: Which command displays the current working directory?
A. ls
B. cd
C. pwd
D. echo $PATH
Correct Answer: C
Explanation: The pwd command stands for "print working directory." When
executed, it outputs the absolute path of the directory you are currently in. The ls
command lists files, cd changes directories, and echo $PATH displays the system's
search path for executables. None of these show your current location.
Question 5: A user wants to change into their own home directory.
Which two commands will accomplish this? (Choose two.)
A. cd ~
B. cd /
C. cd $HOME
D. cd ..
Correct Answers: A and C
Explanation: The tilde (~) character is a shell shortcut that expands to the current
user's home directory. The environment
variable 𝐻𝑂𝑀𝐸𝑎𝑙𝑠𝑜𝑐𝑜𝑛𝑡𝑎𝑖𝑛𝑠𝑡ℎ𝑒𝑓𝑢𝑙𝑙𝑝𝑎𝑡ℎ𝑡𝑜𝑡ℎ𝑒ℎ𝑜𝑚𝑒𝑑𝑖𝑟𝑒𝑐𝑡𝑜𝑟𝑦. 𝐵𝑜𝑡ℎ𝑐𝑑 𝑎𝑛𝑑𝑐𝑑
HOME will take you there. The command cd / takes you to the root directory, and
cd .. moves you up one level to the parent directory.
, Question 6: Which command changes the current directory to the
parent directory?
A. cd ..
B. cd .
C. cd ~
D. cd /
Correct Answer: A
Explanation: The double dot (..) is a special directory entry that represents the
parent of the current directory. Running cd .. moves you up one level in the
filesystem hierarchy. The single dot (.) represents the current directory, the tilde
(~) represents the home directory, and the slash (/) represents the root directory.
Question 7: Which command changes the current directory to /etc?
A. cd etc
B. cd /etc
C. cd ~/etc
D. cd ./etc
Correct Answer: B
Explanation: The slash (/) at the beginning of /etc indicates an absolute path
starting from the root directory. This will take you directly to the etc directory
regardless of your current location. The other options use relative paths: cd etc
looks for an etc subdirectory inside your current directory, cd ~/etc looks for etc
inside your home directory, and cd ./etc also looks for etc inside your current
directory.
