Question # 1
| An administrator accidentally installed the httpd RPM package along with several dependencies. Which of the following options is the best way for the administrator to revert the package installation? |
| A. dnf clean all | | B. rpm -e httpd | | C. apt-get clean | | D. yum history undo last |
D. yum history undo last
Explanation:
The yum history undo last command allows the administrator to undo the most recent transaction, effectively removing the httpd package and any installed dependencies. This is the safest and easiest way to revert package installations in RPM-based systems using yum.
Question # 2
| A Linux administrator needs to check extended permissions applied to the directory test. Which of the following commands should the administrator use to help with this task? |
| A. getsebool test/ | | B. getenforce test/ | | C. getfacl test/ | | D. ls -al test/ |
C. getfacl test/
Explanation: getfacl is the command used to view the Access Control List (ACL) of a file or directory, which shows extended permissions beyond the basic owner, group, and others. This is essential for checking permissions that are set using ACLs on the directory test.
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
| An administrator needs to get network information from a group of statically assigned workstations before they are reconnected to the network. Which of the following should the administrator use to obtain this information? |
| A. ip show | | B. ifcfg —a | | C. ifcfg —s | | D. i fname —s |
B. ifcfg —a
Explanation:
The ifcfg command is used to configure network interfaces on Linux systems. The -a option displays information about all network interfaces, including their IP addresses, netmasks, gateways, and other parameters. This command can help the administrator obtain the network information from the statically assigned workstations before they are reconnected to the network. References: [Linux Networking: ifcfg Command With Examples]
Question # 5
| A Linux administrator created a virtual clone of a physical server and would like to remove any existing entries related to SSH keys from outside entities on the virtual clone. Which of the following files should the administrator remove? (Select two). |
| A. ~/.ssh/authorized_keys | | B. ~/.ssh/known_hosts | | C. /etc/ssh/ssh_config | | D. ~/.ssh/config | | E. /etc/ssh/sshd_config |
A. ~/.ssh/authorized_keys
B. ~/.ssh/known_hosts
Explanation:
The ~/.ssh/authorized_keys file contains SSH public keys that grant access to the user account. Removing this file ensures that no external entities can log in using previously authorized keys. The ~/.ssh/known_hosts file stores fingerprints of previously connected hosts. Removing this file ensures that SSH doesn't trust any previously connected hosts.
Question # 6
| A systems administrator checked out the code from the repository, created a new branch, made changes to the code, and then updated the main branch. The systems administrator wants to ensure that the Terraform state files do not appear in the main branch. Which of following should the administrator use to meet this requirement? |
| A. clone | | B. gitxgnore | | C. get | | D. .ssh |
B. gitxgnore
Explanation:
To prevent certain files from being tracked by Git, the administrator can use a .gitignore file
(B) in the repository. The .gitignore file can specify patterns of files or directories that Git should ignore. This way, the Terraform state files will not appear in the main branch or any
other branch. The other commands are not related to this requirement. References: [CompTIA Linux+ Study Guide], Chapter 10: Working with Git, Section: Ignoring Files with .gitignore
[How to Use .gitignore File]
Question # 7
A Linux systems administrator is trying to execute a particular shell script on a server. The administrator reviews the following outputs:
shell
$ ./startup.sh
bash: ./startup.sh: Permission denied
$ ls -l startup.sh
-rw-rw-r-- 1 companyabc companyabc 18 October 15:35 startup.sh
Which of the following commands should the administrator use to allow the script to run?
|
| A. chown root startup.sh | | B. chmod 750 startup.sh | | C. chmod -x startup.sh | | D. chmod 400 startup.sh |
B. chmod 750 startup.sh
Explanation:
The script is missing the execute permission. Using chmod 750 startup.sh adds execute permissions for the owner and grants read and execute permissions for the group, allowing the script to run. Without execute permissions, the shell cannot run the script.
Question # 8
| A DevOps engineer pushed the updated configuration to an existing branch of a remote Git repository. Which of the following commands should the Linux administrator use to obtain these configuration changes? |
| A. git pull | | B. git log | | C. git fetch | | D. git checkout main |
A. git pull
Explanation:
The git pull command fetches changes from the remote repository and merges them into the current branch. This is the correct command for obtaining the updated configuration that was pushed to the remote repository.
Question # 9
The applications team is reporting issues when trying to access the web service hosted in a Linux system. The Linux systems administrator is reviewing the following outputs:
Output 1:
* httpd.service = The Apache HTTPD Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled) Active: inactive (dead)
Docs: man:httpd(8) man:apachectl(8) Output 2:
16:51:16 up 28 min, 1 user, load average: 0.00, 0.00, 0.07
Which of the following statements best describe the root cause? (Select two).
|
| A. The httpd service is currently started. | | B. The httpd service is enabled to auto start at boot time, but it failed to start. | | C. The httpd service was manually stopped. | | D. The httpd service is not enabled to auto start at boot time. | | E. The httpd service runs without problems. |
C. The httpd service was manually stopped.
D. The httpd service is not enabled to auto start at boot time.
Explanation:
The httpd.service is the Apache HTTPD Server, which is a web service that runs on Linux systems. The output 1 shows that the httpd.service is inactive (dead), which means that it is not running. The output 1 also shows that the httpd.service is disabled, which means that it is not enabled to auto start at boot time. Therefore, the statements C and D best describe the root cause of the issue. The statements A, B, E, and F are incorrect because they do not match the output 1. References: [How to Manage Systemd Services on a Linux System]
Question # 10
| A new application container was built with an incorrect version number. Which of the following commands should be used to rename the image to match the correct version 2.1.2? |
| A. docker tag comptia/app:2.1.1 comptia/app:2.1.2 | | B. docker push comptia/app:2.1.1 comptia/app:2.1.2 | | C. docker rmi comptia/app:2.1.1 comptia/app:2.1.2 | | D. docker update comptia/app:2.1.1 comptia/app:2.1.2 |
A. docker tag comptia/app:2.1.1 comptia/app:2.1.2
Explanation:
The best command to use to rename the image to match the correct version 2.1.2 is A. docker tag comptia/app:2.1.1 comptia/app:2.1.2. This command will create a new tag for the existing image with the new version number, without changing the image content or ID. The other commands are either incorrect or not suitable for this task. For example:
B. docker push comptia/app:2.1.1 comptia/app:2.1.2 will try to push two images to
a remote repository, but it does not rename the image locally.br>
C. docker rmi comptia/app:2.1.1 comptia/app:2.1.2 will try to remove two images from the local system, but it does not rename the image.br>
D. docker update comptia/app:2.1.1 comptia/app:2.1.2 will try to update the configuration of a running container, but it does not rename the image.
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