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| Section | Weight | Objectives |
|---|---|---|
| Security | 21% | - Implement security hardening - Configure SELinux and security contexts - Apply best practices for permissions and authentication - Perform vulnerability assessments - Manage file security and access controls - Manage firewalls |
| Scripting, Containers, and Automation | 19% | - Write and execute BASH shell scripts - Deploy and manage containers (Docker/Podman) - Implement automation workflows - Manage version control using Git - Manage orchestration processes - Automate administration with Python and configuration management tools |
| Troubleshooting | 28% | - Troubleshoot system properties and processes - Troubleshoot network connectivity (firewall, routing, DNS) - Optimize performance (CPU, memory, I/O) - Troubleshoot security issues (SELinux, permissions) - Troubleshoot user issues - Monitor system logs, health, and events - Troubleshoot hardware issues - Troubleshoot application issues |
| System Management | 32% | - Configure storage and cloud/virtualization technologies - Manage kernel modules - Manage storage - Manage users and groups - Manage networking - Manage system components - Manage the Linux boot process - Manage devices - Manage files and directories - Manage packages and software - Manage permissions and ownership - Perform basic Linux tasks - Configure kernel modules and network parameters |
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NEW QUESTION # 133
Which of the following best describes PEP 8?
Answer: A
Explanation:
The correct answer is B. A set of coding conventions for Python code. PEP 8 stands for Python Enhancement Proposal 8, and it defines the official style guide for writing clean, readable, and consistent Python code. In Linux system administration, particularly within automation and scripting tasks, Python is widely used, and adhering to PEP 8 ensures that scripts are maintainable and understandable by other administrators.
PEP 8 covers a broad range of coding standards, including naming conventions, indentation, spacing, line length, import organization, and general code layout. For example, it recommends using four spaces per indentation level, limiting lines to 79 characters, and using descriptive variable and function names. These guidelines help improve code readability and reduce errors when scripts are shared or maintained across teams.
Option A is incorrect because PEP 8 does not list built-in Python modules; instead, it focuses on how code should be written. Option C is incorrect because PEP 8 is not a name for standard Python libraries but rather a style guide applicable to all Python code. Option D is incorrect because PEP 8 is not a data structure; it is purely a documentation standard.
From a Linux+ perspective, understanding PEP 8 is important in the context of scripting and automation.
Administrators frequently write Python scripts to automate system tasks such as log analysis, configuration management, and monitoring. Following PEP 8 ensures consistency across scripts, making collaboration easier and reducing troubleshooting time. Properly formatted code also improves long-term maintainability, which is critical in production environments where scripts may be reused or modified over time.
NEW QUESTION # 134
A Linux user needs to download the latest Debian image from a Docker repository. Which of the following commands makes this task possible?
Answer: B
Explanation:
The docker image pull command downloads an image from a Docker repository (such as Docker Hub). Using docker image pull debian retrieves the latest Debian image.
NEW QUESTION # 135
A systems administrator is having issues installing packages in a Linux system. The administrator receives the following outputs:
Which of the following is the best command to fix this issue?
Answer: D
Explanation:
The CA bundle path is a symlink to a file under /etc/pki/ca-trust/extracted/pem, and update-ca- trust cannot create that generated bundle while SELinux is enforcing. Restoring the default SELinux contexts on that directory allows the bundle file to be created and fixes the certificate verification failures during package installs.
NEW QUESTION # 136
A systems administrator is deploying a web server using the following code:
Which of the following technologies is the administrator using to create this web server?
Answer: B
Explanation:
The code uses Chef's Ruby DSL for defining a role with name, description, run_list, and default_attributes, which are constructs specific to Chef.
NEW QUESTION # 137
Which of the following commands is used to verify whether a port is open on a remote host?
Answer: B
Explanation:
The correct answer is C. nc because netcat (nc) is specifically designed to test network connectivity, including verifying whether a particular port is open on a remote host. It is a versatile networking tool commonly used in troubleshooting and diagnostics.
Using a command such as nc -zv < hostname > < port > , an administrator can attempt to establish a connection to a remote port. The -z option tells netcat to scan for listening daemons without sending data, and the -v option enables verbose output, indicating whether the connection was successful or refused. This makes nc one of the most efficient tools for quickly validating port accessibility.
Option A (ip) is incorrect because the ip command is used for network interface configuration and routing, not for testing remote port connectivity.
Option B (ping) is incorrect because it tests basic network reachability using ICMP packets, but it does not verify whether specific TCP/UDP ports are open.
Option D (netstat) is incorrect because it displays network connections and listening ports on the local machine, not remote hosts.
From a Linux+ troubleshooting standpoint, identifying whether a service is reachable on a specific port is essential for diagnosing connectivity issues. Tools like nc, telnet, and nmap are commonly used for this purpose, but nc is preferred due to its simplicity and flexibility. It helps determine whether issues stem from firewall rules, service availability, or network path problems, making it a critical command in a system administrator's toolkit.
NEW QUESTION # 138
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