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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: System Management | 30% | - Linux installation, configuration, and system management
|
| Topic 2: Scripting, Containers & Automation | 20% | - Automation and scripting
|
| Topic 3: Troubleshooting | 25% | - System and network troubleshooting
|
| Topic 4: Security | 25% | - System security and access control
|
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NEW QUESTION # 114
A systems administrator needs to write a script that counts the number of times "FAIL" appears in a log file. If "FAIL" appears zero times, then the administrator would like to print the message
"SUCCESS." Given the following:
Which of the following should be used before the zero to complete the script?
Answer: C
Explanation:
The test should check if the count of "FAIL" equals zero. The operator -eq is used for numeric equality in shell conditionals, so [ $(grep -c FAIL /var/file.log) -eq 0 ] correctly evaluates whether the count is zero.
NEW QUESTION # 115
Due to application compatibility issues, the Python 3 OpenSSL library should not be upgraded. Which of the following commands should the systems administrator use to ensure the package stays at the current version?
Answer: B
Explanation:
Package management is a critical system management task covered extensively in the Linux+ V8 objectives.
On Debian-based systems (like Ubuntu), administrators often need to " pin " or " hold " a specific package version to prevent it from being automatically updated during a general system upgrade (apt upgrade). This is commonly done to avoid breaking applications that have strict version dependencies.
The modern and most direct way to accomplish this is using the apt-mark utility. The command apt-mark hold
< package_name > marks the package as " on hold " in the package manager database. Once a package is on hold, apt will skip it during upgrades until an administrator explicitly runs apt-mark unhold.
While Option D (echo " package hold " | dpkg --set-selections) is a valid legacy method, apt-mark hold (Option C) is the preferred and more user-friendly standard in contemporary Linux administration. Option A has incorrect syntax for dpkg. Option B uses a non-existent command (set-selections is a sub-module of dpkg, not apt).
Therefore, apt-mark hold is the verified correct answer for ensuring a package remains at its current version.
NEW QUESTION # 116
A Linux software developer wants to use AI to optimize source code used in a commercial product. Which of the following steps should the developer take first?
Answer: A
Explanation:
Linux+ V8 emphasizes security, compliance, and governance when introducing new automation technologies, including AI. Before using AI tools to optimize commercial source code, the developer must ensure that such usage complies with organizational policies.
Option B is correct because verifying company policy is the first and most critical step. AI tools may introduce risks such as intellectual property leakage, licensing conflicts, or regulatory violations. Many organizations restrict how source code can be shared with external systems, including AI services.
The other options are premature. Selecting tools or deploying models should only occur after policy approval.
Linux+ V8 highlights governance-first approaches when adopting automation technologies.
Therefore, the correct answer is B.
NEW QUESTION # 117
A systems administrator is configuring new Linux systems and needs to enable passwordless authentication between two of the servers. Which of the following commands should the administrator use?
Answer: C
Explanation:
Passwordless authentication using SSH key pairs is a foundational security practice covered in the Security domain of CompTIA Linux+ V8. It allows administrators to securely authenticate between systems without transmitting passwords over the network, significantly reducing the risk of credential compromise.
The correct approach involves two essential steps: generating an SSH key pair and installing the public key on the remote system. Option A correctly performs both steps using best-practice commands.
The command ssh-keygen -t rsa generates an RSA public/private key pair in the user's ~/.ssh/ directory. The private key (id_rsa) remains securely on the local system, while the public key (id_rsa.pub) is intended to be shared. The second part of the command, ssh-copy-id -i ~/.ssh/id_rsa.pub john@server2, securely copies the public key to the remote server's ~/.ssh/authorized_keys file. This enables key-based authentication for the specified user.
The other options are incorrect or incomplete. Option B uses ssh-keyscan, which is intended for collecting host keys to populate known_hosts, not for user authentication. Option C misuses ssh-agent, which manages keys already generated and does not create or install them. Option D is insecure and incorrect because copying the entire .ssh directory risks exposing private keys and violates security best practices.
Linux+ V8 documentation emphasizes the use of ssh-keygen and ssh-copy-id as the standard, secure method for configuring passwordless SSH access. This approach ensures proper permissions, correct key placement, and minimal risk.
NEW QUESTION # 118
Which of the following filesystems contains non-persistent or volatile data?
Answer: B
Explanation:
The /proc filesystem is a virtual filesystem that provides process and kernel information. It is non- persistent and volatile, meaning its contents exist only in memory and are regenerated at each system boot.
NEW QUESTION # 119
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