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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 28% | - Troubleshoot application issues - Troubleshoot network connectivity (firewall, routing, DNS) - Troubleshoot system properties and processes - Troubleshoot security issues (SELinux, permissions) - Troubleshoot user issues - Optimize performance (CPU, memory, I/O) - Monitor system logs, health, and events - Troubleshoot hardware issues |
| Security | 21% | - Manage firewalls - Configure SELinux and security contexts - Perform vulnerability assessments - Implement security hardening - Manage file security and access controls - Apply best practices for permissions and authentication |
| Scripting, Containers, and Automation | 19% | - Manage orchestration processes - Manage version control using Git - Automate administration with Python and configuration management tools - Deploy and manage containers (Docker/Podman) - Implement automation workflows - Write and execute BASH shell scripts |
| System Management | 32% | - Configure kernel modules and network parameters - Manage system components - Manage storage - Perform basic Linux tasks - Manage the Linux boot process - Configure storage and cloud/virtualization technologies - Manage kernel modules - Manage devices - Manage files and directories - Manage packages and software - Manage users and groups - Manage networking - Manage permissions and ownership |
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NEW QUESTION # 132
Which of the following describes how a user's public key is used during SSH authentication?
Answer: C
Explanation:
During SSH public key authentication, the server checks if the user's public key is present in the
~/.ssh/authorized_keys file. If the key is found, the server uses it to verify the user's identity by sending a challenge that can only be answered by the corresponding private key. This process does not involve password hashing or using the public key directly for encryption of the communication stream. Instead, the public key is simply used as a reference for authentication.
NEW QUESTION # 133
Which of the following can reduce the attack surface area in relation to Linux hardening?
Answer: A
Explanation:
Reducing the attack surface area in Linux hardening refers to limiting possible points of unauthorized access. According to the CompTIA Linux+ Official Study Guide (Exam XK0-006), enforcing strong password policies is a critical aspect of security hardening. This practice ensures that user accounts are protected by passwords that are difficult to guess or crack, thus minimizing the risk of successful brute-force attacks. Implementing password complexity requirements (such as minimum length, use of uppercase, lowercase, numbers, and special characters) directly addresses one of the primary vectors for unauthorized access.
NEW QUESTION # 134
A systems administrator wants to update and apply changes in an existing file in a remote Git repository. Which of the following is the last Git command the administrator should execute to complete this process?
Answer: A
Explanation:
The git push command sends the committed changes from the local branch to the remote repository, making the updates available remotely and completing the update process.
NEW QUESTION # 135
SIMULATION 4
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:
Archive tab:
tar -cvf /tmp/ann.tar -C /home ann
Extract tab:
tar -xvf /tmp/ann.tar -C /home/joe
NEW QUESTION # 136
A Linux administrator attempts to log in to a server over SSH as root and receives the following error message: Permission denied, please try again. The administrator is able to log in to the console of the server directly with root and confirms the password is correct. The administrator reviews the configuration of the SSH service and gets the following output:
Based on the above output, which of the following will most likely allow the administrator to log in over SSH to the server?
Answer: B
Explanation:
The SSH configuration option PermitRootLogin prohibit-password prevents the root user from logging in with password authentication. This setting means root cannot use a password to log in via SSH; only key- based authentication is permitted for root. The administrator can still log in as root locally, which is not affected by this SSH configuration. To allow SSH access as root, the administrator must use an SSH key instead of a password.
Other options:
* A. MaxSessions controls the number of simultaneous SSH sessions but is not causing the login denial here.
* B. PAM (Pluggable Authentication Modules) is disabled, but enabling it is not required for basic SSH authentication.
* C. Changing the SSH port is unrelated to the authentication method issue.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 11: "Securing Linux", Section: "Securing SSH Access" CompTIA Linux+ XK0-006 Objectives, Domain 3.0: Security
NEW QUESTION # 137
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