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The XK0-005 Exam covers a range of topics, including system architecture, Linux installation and package management, file systems and storage management, network configuration, security, and troubleshooting. XK0-005 exam is designed to assess a candidate's practical knowledge and skills in Linux administration and is recognized by employers as a valuable certification for IT professionals. Earning the CompTIA Linux+ certification validates a candidate's skills and knowledge in Linux administration and can lead to better job opportunities and higher salaries in the IT industry.
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A Linux system fails to start and delivers the following error message:
Which of the following commands can be used to address this issue?
A. fdisk /dev/sda1
B. mkfs.ext4 /dev/sda1
C. fsck.ext4 /dev/sda1
D. partprobe /dev/sda1
Answer: C
Explanation:
Explanation
The command fsck.ext4 /dev/sda1 can be used to address the issue. The issue is caused by a corrupted filesystem on the /dev/sda1 partition. The error message shows that the filesystem type is ext4 and the superblock is invalid. The command fsck.ext4 is a tool for checking and repairing ext4 filesystems. The command will scan the partition for errors and attempt to fix them. This command can resolve the issue and allow the system to start. The other options are incorrect because they either do not fix the filesystem (partprobe or fdisk) or destroy the data on the partition (mkfs.ext4). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Storage, page 325.
NEW QUESTION # 617
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 push comptia/app:2.1.1 comptia/app:2.1.2
B. docker rmi comptia/app:2.1.1 comptia/app:2.1.2
C. docker tag comptia/app:2.1.1 comptia/app:2.1.2
D. docker update comptia/app:2.1.1 comptia/app:2.1.2
Answer: C
Explanation:
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.
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.
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.
NEW QUESTION # 618
A user is asking the systems administrator for assistance with writing a script to verify whether a file exists.
Given the following:
Which of the following commands should replace the <CONDITIONAL> string?
A. if [ -f "$filename" ] then
B. if [ -f "$filename" ]; while
C. if [ -d "$filename" ]; then
D. if [ -f "$filename" ]; then
Answer: D
Explanation:
Explanation
The command if [ -f "$filename" ]; then checks if the variable $filename refers to a regular file that exists.
The -f option is used to test for files. If the condition is true, the commands after then are executed. This is the correct way to replace the <CONDITIONAL> string. The other options are incorrect because they either use the wrong option (-d tests for directories), the wrong syntax (missing a semicolon after the condition), or the wrong keyword (while is used for loops, not conditions). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 16: Writing and Executing Bash Shell Scripts, page 493.
NEW QUESTION # 619
A Linux administrator is scheduling a system job that runs a script to check available disk space every hour. The Linux administrator does not want users to be able to start the job. Given the following:
The Linux administrator attempts to start the timer service but receives the following error message:
Which of the following is MOST likely the reason the timer will not start?
A. The checkdiskspace.timer unit should be enabled via systemct1.
B. The timers.target should be reloaded to get the new configuration.
C. The checkdiskspace.timer should be configured to allow manual starts.
D. The checkdiskspace.timer should be started using the sudo command.
Answer: C
Explanation:
The most likely reason the timer will not start is that the checkdiskspace.timer should be configured to allow manual starts. By default, systemd timers do not allow manual activation via systemct1 start, unless they have RefuseManualStart=no in their [Unit] section. This option prevents users from accidentally starting timers that are meant to be controlled by other mechanisms, such as calendar events or dependencies. To enable manual starts for checkdiskspace.timer, the administrator should add RefuseManualStart=no to its [Unit] section and reload systemd.
The other options are not correct reasons for the timer not starting. The checkdiskspace.timer unit does not need to be enabled via systemct1 enable, because enabling a timer only makes it start automatically at boot time or after a system reload, but does not affect manual activation. The timers.target does not need to be reloaded to get the new configuration, because reloading a target only affects units that have a dependency on it, but does not affect manual activation. The checkdiskspace.timer does not need to be started using the sudo command, because the administrator is already running systemct1 as root, as indicated by the # prompt. Reference: systemd.timer(5) - Linux manual page; systemct1(1) - Linux manual page
NEW QUESTION # 620
Which of the following tools is BEST suited to orchestrate a large number of containers across many different servers?
A. Ansible
B. Terraform
C. Podman
D. Kubernetes
Answer: D
Explanation:
The tool that is best suited to orchestrate a large number of containers across many different servers is Kubernetes. Kubernetes is an open-source platform for managing containerized applications and services. Kubernetes allows the administrator to deploy, scale, and update containers across a cluster of servers, as well as to automate the configuration and coordination of the containers. Kubernetes also provides features such as service discovery, load balancing, storage management, security, monitoring, and logging. Kubernetes can handle complex and dynamic workloads and ensure high availability and performance of the containers. Kubernetes is the tool that is best suited to orchestrate a large number of containers across many different servers.
NEW QUESTION # 621
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