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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 28% | - Troubleshoot hardware issues - Troubleshoot network connectivity (firewall, routing, DNS) - Troubleshoot application issues - Monitor system logs, health, and events - Optimize performance (CPU, memory, I/O) - Troubleshoot security issues (SELinux, permissions) - Troubleshoot system properties and processes - Troubleshoot user issues |
| System Management | 32% | - Manage packages and software - Manage kernel modules - Manage devices - Manage files and directories - Manage storage - Manage networking - Manage users and groups - Manage the Linux boot process - Manage system components - Manage permissions and ownership - Configure kernel modules and network parameters - Configure storage and cloud/virtualization technologies - Perform basic Linux tasks |
| Security | 21% | - Configure SELinux and security contexts - Perform vulnerability assessments - Manage firewalls - Manage file security and access controls - Implement security hardening - Apply best practices for permissions and authentication |
| Scripting, Containers, and Automation | 19% | - Write and execute BASH shell scripts - Automate administration with Python and configuration management tools - Implement automation workflows - Manage orchestration processes - Deploy and manage containers (Docker/Podman) - Manage version control using Git |
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NEW QUESTION # 94
An administrator receives reports that a web service is not responding. The administrator reviews the following outputs:
Which of the following is the reason the web service is not responding?
Answer: B
Explanation:
This issue falls under the Troubleshooting domain of the CompTIA Linux+ V8 objectives, specifically service startup failures and certificate-related errors. The provided output clearly indicates that the NGINX service fails during startup due to an inability to locate the private key file.
The critical error message is:
cannot load certificate key " /etc/pki/nginx/private/server.key " : No such file or directory This message confirms that NGINX is explicitly configured to look for the private key in the directory /etc/pki
/nginx/private/. However, the directory listing shows that the private directory exists but is empty, while the server.key file is located in /etc/pki/nginx/ instead. Because NGINX cannot find the private key at the configured path, the configuration test (nginx -t) fails, and systemd prevents the service from starting.
Option C correctly identifies the root cause: the private key is not in the correct location. Moving server.key into /etc/pki/nginx/private/ (or updating the NGINX configuration to match the current location) would resolve the issue. Linux+ V8 documentation stresses that service failures often result from misaligned configuration paths rather than corrupted files.
The other options are incorrect. Option A incorrectly refers to renaming a certificate file and does not address the path issue. Option B suggests a key mismatch, which would generate a different SSL error rather than a
"file not found" error. Option D is also incorrect because private keys should not have executable permissions like 0755; typically, they are restricted (for example, 0600) for security reasons.
Therefore, the web service is not responding because the private key file is not located in the directory expected by the NGINX configuration. The correct answer is C.
NEW QUESTION # 95
A Linux systems administrator needs to extract the contents of a file named
/home/dev/web.bkpto the /var/www/html/directory. Which of the following commands should the administrator use?
Answer: B
Explanation:
The .bkp file here is a cpio archive, not a tar or zip. The correct way to extract it is by changing into the target directory (/var/www/html/) and using cpio -idv < /home/dev/web.bkp. The pushd and popd commands ensure the administrator returns to the original directory afterward.
NEW QUESTION # 96
Which of the following is the best way to create a non-interactive account in a Linux system?
Answer: C
Explanation:
Setting the user's shell to /sbin/nologin prevents interactive logins while still allowing the account to exist for services or background processes, which is the standard method for creating non- interactive accounts.
NEW QUESTION # 97
A Linux administrator needs to create accounts for a list of new users. The user account names have been defined in the USER_LIST variable as follows:
USER_LIST= " alice bob charles "
Which of the following commands should the administrator use to successfully create the user accounts?
Answer: A
Explanation:
Automating user creation is a frequent administrative task. In shell scripting, when you have a space- separated list of items stored in a variable, the for loop is the most efficient way to iterate through them.
According to CompTIA Linux+ V8, the syntax for < variable > in < list > ; do < commands > ; done allows the shell to split the list by whitespace and assign each item to the variable sequentially.
In the command for username in $USER_LIST; do useradd -m " $username " ; done:
* The shell expands $USER_LIST into alice, bob, and charles.
* In the first iteration, username is set to alice, and useradd -m " alice " is executed.
* The process repeats for bob and then charles.
* The -m flag ensures a home directory is created for each user, which is a best practice.
The other options are syntactically incorrect or unsuitable. Options A and B attempt to use while and until with echo, but they lack the read command required to actually assign the piped input to the username variable (e.g., while read username). Option C (select) is used for creating interactive menus for users to choose from, not for automated batch processing.
Therefore, the for loop is the verified and standard method for this task in a Linux environment.
NEW QUESTION # 98
A Linux administrator needs to add a new HTTP service on the server. Which of the following commands allows other systems to communicate with the service after the system is restarted?
Answer: A
Explanation:
This command adds the HTTP service to the firewall's permanent configuration, ensuring the rule persists across system restarts and allows other systems to communicate with the service after reboot.
NEW QUESTION # 99
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