LINUX ADMINISTRATOR CERTIFICATION –QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
*Core Domains*
*1. System Installation and Package Management*
*2. Command Line Operations and File Management*
*3. Security, Permissions, and Access Control*
*4. Kernel Services and Hardware Configuration*
*5. Networking and Troubleshooting*
*6. Storage Management and Filesystem Maintenance*
*7. Automation and Scripting*
*8. Regulatory Compliance and Ethics*
*Introduction*
*This examination is designed to validate the comprehensive technical proficiency of Linux adm
SECTION ONE: QUESTIONS 1–100
Question 1
Which command displays the current working directory?
A. pwd
B. ls
C. cd
D. dir
,🟢A
🔴 RATIONALE: The pwd command stands for print working directory and shows the absolute path of the
current location.
Question 2
Which option is used with the tar command to extract a compressed archive?
A. -c
B. -x
C. -v
D. -f
🟢B
🔴 RATIONALE: The -x flag is required for extraction, while -c is for creating an archive.
Question 3
Which file is used to store local user account information?
A. /etc/shadow
B. /etc/group
C. /etc/passwd
D. /etc/hosts
🟢C
🔴 RATIONALE: The /etc/passwd file contains user account details including username, UID, GID, and
shell information.
Question 4
What command displays currently running processes in real-time?
A. ps
B. top
C. kill
D. jobs
,🟢B
🔴 RATIONALE: The top command provides a dynamic, real-time view of system processes and
resource utilization.
Question 5
Which command is used to display disk partition information?
A. fdisk -l
B. mount
C. mkfs
D. du
🟢A
🔴 RATIONALE: The fdisk -l command lists the partition tables for the specified devices.
Question 6
What is the default port for SSH?
A. 21
B. 80
C. 22
D. 443
🟢C
🔴 RATIONALE: Secure Shell (SSH) communicates over port 22 by default.
Question 7
Which command changes the group ownership of a file?
A. chown
B. chgrp
C. chmod
D. chage
🟢B
, 🔴 RATIONALE: The chgrp command is specifically designed to change the group associated with a file
or directory.
Question 8
Which command is used to install a package in a Debian-based system?
A. yum
B. apt
C. rpm
D. dnf
🟢B
🔴 RATIONALE: The apt command is the high-level package management tool for Debian, Ubuntu, and
related distributions.
Question 9
Which runlevel indicates a system reboot in traditional System V init?
A. 0
B. 1
C. 5
D. 6
🟢D
🔴 RATIONALE: In System V init, runlevel 6 is defined as the state for rebooting the system.
Question 10
Which command displays the system boot messages?
A. dmesg
B. last
C. history
D. free
🟢A
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
*Core Domains*
*1. System Installation and Package Management*
*2. Command Line Operations and File Management*
*3. Security, Permissions, and Access Control*
*4. Kernel Services and Hardware Configuration*
*5. Networking and Troubleshooting*
*6. Storage Management and Filesystem Maintenance*
*7. Automation and Scripting*
*8. Regulatory Compliance and Ethics*
*Introduction*
*This examination is designed to validate the comprehensive technical proficiency of Linux adm
SECTION ONE: QUESTIONS 1–100
Question 1
Which command displays the current working directory?
A. pwd
B. ls
C. cd
D. dir
,🟢A
🔴 RATIONALE: The pwd command stands for print working directory and shows the absolute path of the
current location.
Question 2
Which option is used with the tar command to extract a compressed archive?
A. -c
B. -x
C. -v
D. -f
🟢B
🔴 RATIONALE: The -x flag is required for extraction, while -c is for creating an archive.
Question 3
Which file is used to store local user account information?
A. /etc/shadow
B. /etc/group
C. /etc/passwd
D. /etc/hosts
🟢C
🔴 RATIONALE: The /etc/passwd file contains user account details including username, UID, GID, and
shell information.
Question 4
What command displays currently running processes in real-time?
A. ps
B. top
C. kill
D. jobs
,🟢B
🔴 RATIONALE: The top command provides a dynamic, real-time view of system processes and
resource utilization.
Question 5
Which command is used to display disk partition information?
A. fdisk -l
B. mount
C. mkfs
D. du
🟢A
🔴 RATIONALE: The fdisk -l command lists the partition tables for the specified devices.
Question 6
What is the default port for SSH?
A. 21
B. 80
C. 22
D. 443
🟢C
🔴 RATIONALE: Secure Shell (SSH) communicates over port 22 by default.
Question 7
Which command changes the group ownership of a file?
A. chown
B. chgrp
C. chmod
D. chage
🟢B
, 🔴 RATIONALE: The chgrp command is specifically designed to change the group associated with a file
or directory.
Question 8
Which command is used to install a package in a Debian-based system?
A. yum
B. apt
C. rpm
D. dnf
🟢B
🔴 RATIONALE: The apt command is the high-level package management tool for Debian, Ubuntu, and
related distributions.
Question 9
Which runlevel indicates a system reboot in traditional System V init?
A. 0
B. 1
C. 5
D. 6
🟢D
🔴 RATIONALE: In System V init, runlevel 6 is defined as the state for rebooting the system.
Question 10
Which command displays the system boot messages?
A. dmesg
B. last
C. history
D. free
🟢A
