Page 5 of 14 Β· 263 total questions.
A Linux administrator created a new file system. Which of the following files must be updated to ensure the filesystem mounts at boot time?
The correct answer is C. Option C: /etc/fstab
A Linux administrator is troubleshooting a memory-related issue. Based on the output of the commands: Which of the following commands would address the issue?
The correct answer is B. Option B: kill -9 8321
A systems administrator made some unapproved changes prior to leaving the company. The newly hired administrator has been tasked with revealing the system to a compliant state. Which of the following commands will list and remove the correspondent packages?
The correct answer is D. Option D: dnf history and dnf history undo last
An administrator transferred a key for SSH authentication to a home directory on a remote server. The key file was moved to .ssh/authorized_keys location in order to establish SSH connection without a password. However, the SSH command still asked for the password. Given the following output: Which of the following commands would resolve the issue?
The correct answer is A. Option A: restorecon .ssh/authorized_keys
A cloud engineer needs to remove all dangling images and delete all the images that do not have an associated container. Which of the following commands will help to accomplish this task?
The correct answer is A. Option A: docker images prune -a
A Linux system is failing to boot with the following error: Which of the following actions will resolve this issue? (Choose two.)
The correct answer is B, F. Option B: Execute grub-install /dev/sdX and reboot. Option F: Boot the system on a LiveCD/ISO.
A Linux administrator needs to create an image named sda.img from the sda disk and store it in the /tmp directory. Which of the following commands should be used to accomplish this task?
The correct answer is B. Option B: dd if=/dev/sda of=/tmp/sda.img
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?
The correct answer is C. Option C: sudo fdisk -l
A systems administrator is investigating why one of the servers has stopped connecting to the internet. Which of the following is causing the issue?
The correct answer is A. Option A: The DNS address has been commented out in the configuration file.
Explanation
DNS resolves host names to records such as IP addresses and service locations.
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?
The correct answer is B. Option B: grub-install /dev/sda
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?
The correct answer is B. Option B: systemctl isolate graphical.target
A Linux administrator is tasked with adding users to the system. However, the administrator wants to ensure the usersβ 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?
The correct answer is A. Option A: sudo useradd -e 2021-09-30 Project_user
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?
The correct answer is A. Option A: git clone https://git.company.com/admin/project.git
Explanation
Git provides distributed source control with branching, history, and collaborative change tracking.
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?
The correct answer is A. Option A: echo 'export PATH=$PATH:/opt/operations1/bin' >> /etc/profile
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.)
The correct answer is A, E, H. Option A: df -h / Option E: lvresize βL +10G -r /dev/mapper/rootvg-rootlv Option H: vgextend /dev/rootvg /dev/sdb
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?
The correct answer is B. Option B: docker cp container_id:/deployment.yaml deployment.yaml
Explanation
A container packages an application and dependencies while sharing the host kernel for lightweight isolation.
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.)
The correct answer is B, C. Option B: Interrupt the boot process in the GRUB menu and add systemd.unit=single in the kernel line. Option C: Interrupt the boot process in the GRUB menu and add systemd.unit=rescue.target in the kernel line.
A DevOps engineer needs to allow incoming traffic to ports in the range of 4000 to 5000 on a Linux server. Which of the following commands will enforce this rule?
The correct answer is B. Option B: iptables -t filter -A INPUT -p tcp --dport 4000:5000 -j ACCEPT
A Linux administrator needs to determine whether a hostname is in the DNS. Which of the following would supply the information that is needed?
The correct answer is D. Option D: host
A server is experiencing intermittent connection issues. Some connections to the Internet work as intended, but some fail as if there is no connectivity. The systems administrator inspects the server configuration: Which of the following is MOST likely the cause of the issue?
The correct answer is B. Option B: The IP netmask is wrong for ens3.
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