Question # 1
| A network administrator issues the dig ww. comptia. org command and receives an NXDOMAIN response. Which of the following files should the administrator check first? | | A. /etc/resolv.conf | | B. /etc/hosts | | C. /etc/sysconfig/network-scripts | | D. /etc/nsswitch.conf |
A. /etc/resolv.conf
Explanation:
The dig command uses the DNS servers listed in the /etc/resolv.conf file to resolve domain names. If the dig command returns an NXDOMAIN response, it means the domain does not exist according to the DNS servers used. Therefore, the administrator should check the /etc/resolv.conf file first34.
Question # 2
| An administrator would like to list all current containers, regardless of their running state. Which of the following commands would allow the administrator to accomplish this task? | | A. docker ps -a | | B. docker list | | C. docker image ls | | D. docker inspect image |
A. docker ps -a
Question # 3
The administrator comptia is not able to perform privileged functions on a newly deployed system. Given the following command outputs:
Which of the following is the reason that the administrator is unable to perform the assigned duties? | | A. The administrator needs a password reset. | | B. The administrator is not a part of the correct group. | | C. The administrator did not update the sudo database. | | D. The administrator's credentials need to be more complex. |
B. The administrator is not a part of the correct group.
Question # 4
| A Linux administrator is implementing a CI/CD process for the company’s internal accounting web application. Which of the following best defines the purpose of this process? | | A. To automate the process of building, testing, and deploying application components | | B. To perform security penetration tests on deployed applications to identify vulnerabilities | | C. To formalize the approval process of application releases and configuration changes | | D. To leverage code to document the infrastructure, configurations, and dependencies |
A. To automate the process of building, testing, and deploying application components
Explanation:
CI/CD (Continuous Integration/Continuous Deployment) is a practice that automates the process of building, testing, and deploying applications. This approach reduces manual intervention, ensuring code changes are integrated and tested frequently, leading to faster and more reliable application deployment.
Question # 5
A systems administrator frequently connects to a remote host via SSH and a non-standard port. The systems administrator would like to avoid passing the port parameter on the command line every time. Which of the following files can be used to set a different port value for that host? | | A. /etc/ssh/sshd_config | | B. /etc/ssh/moduli | | C. ~/.ssh/config | | D. ~/.ssh/authorized_keys |
Question # 6
A Linux administrator needs to create a new cloud.cpio archive containing all the files from the current directory. Which of the following commands can help to accomplish this task? | | A. ls | cpio -iv > cloud.epio | | B. ls | cpio -iv < cloud.epio | | C. ls | cpio -ov > cloud.cpio | | D. ls cpio -ov < cloud.cpio |
C. ls | cpio -ov > cloud.cpio
Question # 7
| A systems administrator frequently connects to a remote host via SSH and a non-standard port. The systems administrator would like to avoid passing the port parameter on the command line every time. Which of the following files can be used to set a different port value for that host? | | A. /etc/ssh/sshd_config | | B. /etc/ssh/moduli | | C. ~/.ssh/config | | D. ~/.ssh/authorized_keys |
C. ~/.ssh/config
Explanation: The ~/.ssh/config file can be used to set various options for SSH connections, including the port number, for specific hosts or groups of hosts. This file is located in the user’s home directory and affects only the current user. The /etc/ssh/sshd_config file is used to configure the SSH server daemon, not the client. The /etc/ssh/moduli file contains parameters for Diffie-Hellman key exchange, not port settings.
The ~/.ssh/authorized_keys file contains public keys for authentication, not port
settings. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 12: Secure Shell (SSH), page 414.
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