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NEW QUESTION # 47
An administrator set up a new user account called "test". However, the user is unable to change their password. Given the following output:
Which of the following is the most likely cause of this issue?
Answer: C
Explanation:
For normal users to change their own password, /bin/passwd must have the SUID bit set (permissions should be -rwsr-xr-x). The SUID bit allows users to run the program with the permissions of the file owner (root), which is required to update /etc/shadow. The provided output shows /bin/passwd does not have the SUID bit (no 's' in the owner's execute field). As a result, user "test" receives an "Authentication token manipulation error". The password can be changed as root, which confirms it's a permissions/SUID issue.
Other options:
* B. If the password didn't meet requirements, a different error would appear.
* C. There is no minimum day limit preventing password change (see chage -l output).
* D. The account and password are active (not disabled).
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 6: "User and Group Management", Section:
"Managing User Passwords and Policies"
CompTIA Linux+ XK0-006 Objectives, Domain 1.0: System Management
NEW QUESTION # 48
Joe, a user, has taken a position previously held by Ann. As a systems administrator, you need to archive all the files from Ann ' s home directory and extract them into Joe ' s home directory.
INSTRUCTIONS
Within each tab, click on an object to form the appropriate commands. Command objects may only be used once, but the spacebar _ object may be used multiple times. Not all objects will be used.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
See the solution in Explanation below.
Explanation:
Archive Tab - Create the archive from Ann's home directory
Correct Command:
tar -cvf /tmp/ann.tar -C /home/ ann
Extract Tab - Extract the archive into Joe's home directory
Correct Command:
tar -xvf /tmp/ann.tar -C /home/ joe
This performance-based question tests file archiving and restoration using tar, a core System Management skill in the CompTIA Linux+ V8 objectives. The task requires preserving Ann's files and placing them correctly into Joe's home directory.
# Archive Phase Explanation
The goal of the first step is to archive Ann's entire home directory without embedding the full path (/home
/ann) inside the archive. This is accomplished using the -C option.
Command breakdown:
tar # archive utility
-c # create an archive
-v # verbose output (optional but allowed)
-f /tmp/ann.tar # specifies the archive file
-C /home/ # changes directory before archiving
ann # archives the ann directory only
This results in a clean archive containing Ann's files without absolute paths, which is best practice and explicitly covered in Linux+ V8 documentation.
# Extract Phase Explanation
The second step extracts the archived files into Joe's home directory.
Command breakdown:
-x # extract
-v # verbose
-f /tmp/ann.tar # specifies the archive
-C /home/joe # extracts files directly into Joe's home directory
This ensures Joe receives Ann's files correctly under /home/joe/ann or directly under /home/joe depending on post-extraction handling, which matches Linux+ expectations for administrative user transitions.
NEW QUESTION # 49
On a Kubernetes cluster, which of the following resources should be created in order to expose a port so it is publicly accessible on the internet?
Answer: B
Explanation:
Container orchestration concepts are part of the Automation and Orchestration domain in Linux+ V8. In Kubernetes, workloads run inside Pods, but Pods are not directly accessible from outside the cluster.
To expose an application externally, a Service resource must be created. Services provide a stable network endpoint and can be configured as NodePort, LoadBalancer, or ClusterIP. Public exposure is typically achieved using NodePort or LoadBalancer types.
Option C, Service, is correct. Deployments manage Pods, but they do not handle networking exposure. Pods represent running containers but lack external accessibility by default. "Network" is not a valid Kubernetes resource type.
Linux+ V8 documentation highlights Services as the mechanism for exposing containerized applications.
Therefore, the correct answer is C.
NEW QUESTION # 50
Which of the following cryptographic functions ensures a hard drive is encrypted when not in use?
Answer: B
Explanation:
LUKS (Linux Unified Key Setup) provides full-disk encryption, ensuring that the data on a hard drive is protected and unreadable when the system is powered off or the drive is not in use.
NEW QUESTION # 51
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: A
Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From Linux+ V8 documents:
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 # 52
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