CompTIA XK0-005 CompTIA Linux+ Exam Online Training

Question #91

A Linux administrator is creating a primary partition on the replacement hard drive for an application server.

Which of the following commands should the administrator issue to verify the device name of this partition?

A . sudo fdisk /dev/sda
B . sudo fdisk -s /dev/sda
C . sudo fdisk -l
D . sudo fdisk -h

Reveal Solution Hide Solution

Question #92

A systems administrator is investigating why one of the servers has stopped connecting to the internet.

Which of the following is causing the issue?

A . The DNS address has been commented out in the configuration file.
B . The search entry in the /etc/resolv.conf file is incorrect.
C . Wired connection 1 is offline.
D . No default route is defined.

Reveal Solution Hide Solution

Question #93

A systems administrator is tasked with installing GRUB on the legacy MBR of the SATA hard drive.

Which of the following commands will help the administrator accomplish this task?

A . grub-install /dev/hda
B . grub-install /dev/sda
C . grub-install /dev/sr0
D . grub-install /dev/hd0,0

Reveal Solution Hide Solution

Question #94

A junior Linux administrator is tasked with installing an application.

The installation guide states the application should only be installed in a run level 5 environment.

Which of the following commands would ensure the server is set to runlevel 5?

A . systemct1 isolate multi-user.target
B . systemct1 isolate graphical.target
C . systemct1 isolate network.target
D . systemct1 isolate basic.target

Reveal Solution Hide Solution

Question #95

A Linux administrator is tasked with adding users to the system. However, the administrator wants to ensure the users’ access will be disabled once the project is over. The expiration date should be 2021-09-30.

Which of the following commands will accomplish this task?

A . sudo useradd -e 2021-09-30 Project_user
B . sudo useradd -c 2021-09-30 Project_user
C . sudo modinfo -F 2021-09-30 Project_uses
D . sudo useradd -m -d 2021-09-30 Project_user

Reveal Solution Hide Solution

Question #96

A DevOps engineer needs to download a Git repository from https://git.company.com/admin/project.git.

Which of the following commands will achieve this goal?

A . git clone https://git.company.com/admin/project.git
B . git checkout https://git.company.com/admin/project.git
C . git pull https://git.company.com/admin/project.git
D . git branch https://git.company.com/admin/project.git

Reveal Solution Hide Solution

Question #97

An administrator installed an application from source into /opt/operations1/ and has received numerous reports that users are not able to access the application without having to use the full path /opt/operations1/bin/*.

Which of the following commands should be used to resolve this issue?

A . echo ‘export PATH=$PATH:/opt/operations1/bin’ >> /etc/profile
B . echo ‘export PATH=/opt/operations1/bin’ >> /etc/profile
C . echo ‘export PATH=$PATH/opt/operations1/bin’ >> /etc/profile
D . echo ‘export $PATH:/opt/operations1/bin’ >> /etc/profile

Reveal Solution Hide Solution

Question #98

A Linux system is getting an error indicating the root filesystem is full.

Which of the following commands should be used by the systems administrator to resolve this issue? (Choose three.)

A . df -h /
B . fdisk -1 /dev/sdb
C . growpart /dev/mapper/rootvg-rootlv
D . pvcreate /dev/sdb
E . lvresize CL +10G -r /dev/mapper/rootvg-rootlv
F . lsblk /dev/sda
G . parted -l /dev/mapper/rootvg-rootlv
H . vgextend /dev/rootvg /dev/sdb

Reveal Solution Hide Solution

Correct Answer: ACE
ACE

Explanation:

The administrator should use the following three commands to resolve the issue of the root filesystem being full:

– df -h /. This command will show the disk usage of the root filesystem in a human-readable format. The df command is a tool for reporting file system disk space usage. The -h option displays the sizes in powers of 1024 (e.g., 1K, 234M, 2G). The / specifies the root filesystem. The command df -h / will show the total size, used space, available space, and percentage of the root filesystem. This command will help the administrator identify the problem and plan the solution.

– growpart /dev/mapper/rootvg-rootlv. This command will grow the partition that contains the root filesystem to the maximum size available. The growpart command is a tool for resizing partitions on Linux systems. The /dev/mapper/rootvg-rootlv is the device name of the partition, which is a logical volume managed by the Logical Volume Manager (LVM). The command growpart /dev/mapper/rootvg-rootlv will extend the partition to fill the disk space and increase the size of the root filesystem. This command will help the administrator solve the problem and free up space.

– lvresize CL +10G -r /dev/mapper/rootvg-rootlv. This command will resize the logical volume that contains the root filesystem and add 10 GB of space. The lvresize command is a tool for resizing logical volumes on Linux systems. The -L option specifies the new size of the logical volume, in this case +10G, which means 10 GB more than the current size. The -r option resizes the underlying file system as well. The /dev/mapper/rootvg-rootlv is the device name of the logical volume, which is the same as the partition name. The command lvresize CL +10G -r /dev/mapper/rootvg-rootlv will increase the size of the logical volume and the root filesystem by 10 GB and free up space. This command will help the administrator solve the problem and free up space.

The other options are incorrect because they either do not affect the root filesystem (fdisk -1 /dev/sdb, pvcreate /dev/sdb, lsblk /dev/sda, or vgextend /dev/rootvg /dev/sdb) or do not use the correct syntax (fdisk -1 /dev/sdb instead of fdisk -l /dev/sdb or parted -l /dev/mapper/rootvg-rootlv instead of parted /dev/mapper/rootvg-rootlv print).

References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Storage, pages 318-319, 331-332.

Question #99

A cloud engineer is asked to copy the file deployment.yaml from a container to the host where the container is running.

Which of the following commands can accomplish this task?

A . docker cp container_id/deployment.yaml deployment.yaml
B . docker cp container_id:/deployment.yaml deployment.yaml
C . docker cp deployment.yaml local://deployment.yaml
D . docker cp container_id/deployment.yaml local://deployment.yaml

Reveal Solution Hide Solution

Question #100

A Linux system is failing to start due to issues with several critical system processes.

Which of the following options can be used to boot the system into the single user mode? (Choose two.)

A . Execute the following command from the GRUB rescue shell: mount -o remount, ro/sysroot.
B . Interrupt the boot process in the GRUB menu and add systemd.unit=single in the kernel line.
C . Interrupt the boot process in the GRUB menu and add systemd.unit=rescue.target in the kernel line.
D . Interrupt the boot process in the GRUB menu and add single=user in the kernel line.
E . Interrupt the boot process in the GRUB menu and add init=/bin/bash in the kernel line.
F . Interrupt the boot process in the GRUB menu and add systemd.unit=single.target in the kernel line.

Reveal Solution Hide Solution

Correct Answer: C, F
C, F

Explanation:

The administrator can use the following two options to boot the system into the single user mode: Interrupt the boot process in the GRUB menu and add systemd.unit=rescue.target in the kernel line. This option will boot the system into the rescue mode, which is a minimal environment that allows the administrator to perform basic tasks such as repairing the system. The GRUB menu is a screen that appears when the system is powered on and allows the administrator to choose which kernel or operating system to boot. The kernel line is a line that specifies the parameters for the kernel, such as the root device, the init system, and the boot options. The administrator can interrupt the boot process by pressing the e key in the GRUB menu and edit the kernel line by adding systemd.unit=rescue.target at the end. This option will tell the system to use the rescue target, which is a unit that defines the state of the system in the rescue mode. The administrator can then press Ctrl+X to boot the system with the modified kernel line. This option will boot the system into the single user mode and allow the administrator to troubleshoot the issues.

Interrupt the boot process in the GRUB menu and add systemd.unit=single.target in the kernel line. This option will boot the system into the single user mode, which is a mode that allows the administrator to log in as the root user and perform maintenance tasks. The GRUB menu and the kernel line are the same as the previous option. The administrator can interrupt the boot process by pressing the e key in the GRUB menu and edit the kernel line by adding systemd.unit=single.target at the end. This option will tell the system to use the single target, which is a unit that defines the state of the system in the single user mode. The administrator can then press Ctrl+X to boot the system with the modified kernel line. This option will boot the system into the single user mode and allow the administrator to troubleshoot the issues.

The other options are incorrect because they either do not boot the system into the single user mode (execute the following command from the GRUB rescue shell: mount -o remount, ro/sysroot or interrupt the boot process in the GRUB menu and add systemd.unit=single in the kernel line) or do not use the correct syntax (interrupt the boot process in the GRUB menu and add single=user in the kernel line or interrupt the boot process in the GRUB menu and add init=/bin/bash in the kernel line).

Reference: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 8: Managing the Linux Boot Process, pages 267-268.