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NEW QUESTION 1
A Linux administrator is making changes to local files that are part of a Git repository. The administrator needs to retrieve changes from the remote Git repository. Which of the following commands should the administrator use to save the local modifications for later review?
A. git stash
B. git pull
C. git merge
D. git fetch
Answer: A
Explanation:
The git stash command temporarily saves local modifications without committing them, allowing the administrator to safely run git pull or git fetch later and then reapply the saved changes.
NEW QUESTION 2
Which of the following best describes a use case for playbooks in a Linux system?
A. To provide a set of tasks and configurations to deploy an application.
B. To provide the instructions for implementing version control on a repository.
C. To provide the security information required for a container.
D. To provide the storage volume information required for a pod.
Answer: A
Explanation:
In Ansible, a playbook is a YAML file that defines tasks, configurations, and automation workflows. It is commonly used to deploy applications, configure systems, and manage infrastructure on Linux systems.
NEW QUESTION 3
Which of the following utilities supports the automation of security compliance and vulnerability management?
A. SELinux
B. Nmap
C. AIDE
D. OpenSCAP
Answer: D
Explanation:
OpenSCAP is a framework that automates security compliance checking and vulnerability management by using standardized security content (SCAP). It helps administrators enforce policies and detect vulnerabilities.
NEW QUESTION 4
To perform a live migration, which of the following must match on both host servers? (Choose two.)
A. USB ports.
B. Network speed.
C. Available swap.
D. CPU architecture.
E. Available memory.
F. Disk storage path.
Answer: DF
Explanation:
– CPU architecture must match because live migration requires CPU compatibility to continue running the virtual machine without errors.
– Disk storage path must match so the migrated VM can access its virtual disks seamlessly on the destination host.
NEW QUESTION 5
A Linux systems administrator needs to extract the contents of a file named /home/dev/web.bkp to the /var/www/html/ directory. Which of the following commands should the administrator use?
A. cd /var/www/html/ && gzip -c /home/dev/web.bkp | tar xf –
B. pushd /var/www/html/ $$ cpio -idv < /home/dev/web.bkp && popd
C. tar -c -f /home/dev/web.bkp /var/www/html/
D. unzip -c /home/dev/web.bkp /var/www/html/
Answer: B
Explanation:
The .bkp file here is a cpio archive, not a tar or zip. The correct way to extract it is by changing into the target directory (/var/www/html/) and using cpio -idv < /home/dev/web.bkp. The pushd and popd commands ensure the administrator returns to the original directory afterward.
NEW QUESTION 6
A Linux administrator needs to create and then connect to the app-01-image container. Which of the following commands accomplishes this task?
A. docker run -it app-01-image
B. docker start -td app-01-image
C. docker build -ic app-01-image
D. docker exec -dc app-01-image
Answer: A
Explanation:
The docker run -it command both creates a new container from the specified image and attaches to it interactively, which is exactly what the administrator needs.
NEW QUESTION 7
Which of the following filesystems contains non-persistent or volatile data?
A. /boot
B. /usr
C. /proc
D. /var
Answer: C
Explanation:
The /proc filesystem is a virtual filesystem that provides process and kernel information. It is non-persistent and volatile, meaning its contents exist only in memory and are regenerated at each system boot.
NEW QUESTION 8
In the echo “profile-$num-$name” line of a shell script, the variable $num seems to not be expanding during execution. Which of the following notations ensures the value is expanded?
A. echo “profile-$(num)-$name”
B. echo ‘profile-$num-$name’
C. echo “profile-‘Snum‘-$name”
D. echo “profile-${num}-$name”
Answer: D
Explanation:
Using ${num} ensures correct variable expansion, especially when variables are adjacent to other characters or hyphens. This prevents ambiguity and guarantees $num is properly expanded within the string.
NEW QUESTION 9
Which of the following describes the method of consolidating system events to a single location?
A. Log aggregation.
B. Health checks.
C. Webhooks.
D. Threshold monitoring.
Answer: A
Explanation:
Log aggregation is the process of collecting and consolidating logs from multiple sources into a single location, making it easier to analyze and manage system events.
NEW QUESTION 10
A Linux administrator wants to add a user to the Docker group without changing their primary group. Which of the following commands should the administrator use to complete this task?
A. sudo groupmod docker user
B. sudo usermod -g docker user
C. sudo usermod -aG docker user
D. sudo groupmod -G docker user
Answer: C
Explanation:
The usermod -aG command appends (-a) the user to a supplementary group (-G) without changing their primary group. This is the correct way to add a user to the docker group.
NEW QUESTION 11
A DevOps engineer made some changes to files on a local repository. The engineer realizes that the changes broke the application and the changes need to be reverted back. Which of the following commands is the best way to accomplish this task?
A. git pull
B. git reset
C. git rebase
D. git stash
Answer: B
Explanation:
The git reset command reverts changes in the local repository to a previous commit, effectively discarding the problematic modifications and restoring the application to a working state.
NEW QUESTION 12
Users cannot access an application that is running inside containers. The administrator wants to validate whether the containers are running. Which of the following commands should the administrator use?
A. docker start
B. docker ps
C. docker run
D. docker images
Answer: B
Explanation:
The docker ps command lists all running containers, allowing the administrator to verify whether the application’s containers are active.
NEW QUESTION 13
Which of the following commands should a Linux administrator use to determine the version of a kernel module?
A. modprobe bluetooth
B. lsmod bluetooth
C. depmod bluetooth
D. modinfo bluetooth
Answer: D
Explanation:
The modinfo command displays detailed information about a kernel module, including its version, author, description, and parameters.
NEW QUESTION 14
A systems administrator wants to review the amount of time the NetworkManager service took to start. Which of the following commands accomplishes this goal?
A. resolvectl
B. journalctl
C. systemctl daemon-reload
D. systemd-analyze blame
Answer: D
Explanation:
The systemd-analyze blame command shows the startup time of each service managed by systemd, allowing the administrator to see how long NetworkManager (or any other service) took to start.
NEW QUESTION 15
A Linux systems administrator is running an important maintenance task that consumes a large amount of CPU, causing other applications to slow. Which of the following actions should the administrator take to help alleviate the issue?
A. Increase the available CPU time with pidstat.
B. Lower the priority of the maintenance task with renice.
C. Run the maintenance task with nohup.
D. Execute the other applications with the bg utility.
Answer: B
Explanation:
The renice command adjusts the priority of a running process. By lowering the maintenance task’s priority, the scheduler allocates more CPU time to other applications, reducing their slowdown.
NEW QUESTION 16
Which of the following is a protocol for accessing distributed directory services containing a hierarchy of users, groups, machines, and organization units?
A. SMB
B. TLS
C. LDAP
D. KRB-5
Answer: C
Explanation:
LDAP (Lightweight Directory Access Protocol) is specifically designed for accessing and maintaining distributed directory services that organize users, groups, computers, and organizational units in a hierarchical structure.
NEW QUESTION 17
Which of the following commands should an administrator use to see a full hardware inventory of a Linux system?
A. dmidecode
B. lsmod
C. dmesg
D. lscpu
Answer: A
Explanation:
dmidecode retrieves detailed hardware information from the system’s DMI/SMBIOS, including BIOS, CPU, memory, and motherboard details, providing a full hardware inventory.
NEW QUESTION 18
Following the completion of monthly server patching, a Linux administrator receives reports that a critical application is not functioning. Which of the following commands should help the administrator determine which packages were installed?
A. dnf history
B. dnf list
C. dnf info
D. dnf search
Answer: A
Explanation:
The dnf history command shows a log of past package operations (install, update, remove), allowing the administrator to review which packages were installed or updated during the patching process.
NEW QUESTION 19
Which of the following is a characteristic of Python 3?
A. It is closed source.
B. It is extensible through modules.
C. It is fully backwards compatible.
D. It is binary compatible with Java.
Answer: B
Explanation:
Python 3 is open source and supports extensibility through modules and packages, allowing developers to add functionality easily. It is not fully backward compatible with Python 2 and has no binary compatibility with Java.
NEW QUESTION 20
Which of the following passwords is the most complex?
A. H3sa1dt01d
B. he$@ID$heTold
C. H3s@1dSh3t0|d
D. HeSaidShetold
Answer: C
Explanation:
This password is the most complex because it uses uppercase and lowercase letters, numbers, and multiple special characters, making it significantly harder to guess or brute-force compared to the others.
NEW QUESTION 21
An administrator receives the following output while attempting to unmount a filesystem:
umount /data1: target is busy.
Which of the following commands should the administrator run next to determine why the filesystem is busy?
A. ps -f /data1
B. du -sh /data1
C. top -d /data1
D. lsof | grep /data1
Answer: D
Explanation:
The lsof command lists open files and the processes using them. Running lsof | grep /data1 will show which processes are keeping the /data1 filesystem busy, preventing it from being unmounted.
NEW QUESTION 22
A systems technician needs to install a third-party software package. Which of the following commands would allow the technician to download this software package from a remote server?
A. netstat
B. nc
C. telnet
D. wget
Answer: D
Explanation:
wget is specifically designed to download files from remote servers using HTTP, HTTPS, or FTP protocols, making it the appropriate command for retrieving software packages.
NEW QUESTION 23
A Linux administrator is attempting to capture all network traffic coming to the server from the 10.0.6.5 IP address. Which of the following commands should the administrator run on the server to achieve the goal?
A. tcpdump ip 10.0.6.5
B. tcpdump net 10.0.6.5
C. tcpdump host 10.0.6.5
D. tcpdump addr 10.0.6.5
Answer: C
Explanation:
tcpdump host 10.0.6.5 applies a Berkeley Packet Filter that matches any packets to or from the IP 10.0.6.5, capturing all traffic involving that host. The net qualifier is for entire subnets, ip isn’t a valid filter keyword by itself, and addr is not recognized in tcpdump’s filter syntax.
NEW QUESTION 24
A systems administrator wants to check if the ntpd service is configured to start on startup. Which of the following commands will show that information when run?
A. systemctl is-active ntpd.service
B. systemctl stop ntpd.service
C. systemctl is-enabled ntpd.service
D. systemctl start ntpd.service
Answer: C
NEW QUESTION 25
A Linux systems administrator is resolving a privileged access issue for users who are members of an admin group. Which of the following configuration files should the administrator update so the users in the admin group will have root privileged access to the Linux system?
A. /etc/sudoers
B. /etc/login.defs
C. /etc/group
D. /etc/shadow
Answer: A
Explanation:
The /etc/sudoers file controls which users and groups can elevate privileges via sudo. By adding a line such as %admin ALL=(ALL) ALL to /etc/sudoers, members of the admin group gain root-level access.
NEW QUESTION 26
After system startup, the X Window System GUI login interface is not displaying. Which of the following commands ensures that the GUI is started during the system startup process?
A. systemctl isolate graphical.target
B. systemctl unmask xwindow.service
C. systemctl enable xwindow.service
D. systemctl set-default graphical.target
Answer: D
Explanation:
Setting the default target to graphical.target tells systemd to boot into the graphical interface on startup. The command systemctl set-default graphical.target makes the GUI login display automatically at boot.
NEW QUESTION 27
Which of the following actions is required to establish passwordless SSH authentication?
A. Copy the private SSH key to the remote server.
B. Copy the public and private keys to the remote server.
C. Generate public and private keys on the remote server.
D. Copy the public SSH key to the remote server.
Answer: D
Explanation:
Copying the public SSH key to the remote server’s authorized_keys file is all that’s needed to enable passwordless SSH authentication.
NEW QUESTION 28
A Linux server is not starting up because files in the /boot/ partition are corrupt. After the initial GRUB screen, the following message is displayed:
Probing EDD (edd=off to disable)… ok
uncompression error
–system halted
Which of the following steps should the Linux administrator take to recover the system without destroying the existing installation? (Choose two.)
A. Replace the hard drive.
B. Increase the amount of swap memory.
C. Start up in single-user mode.
D. Start up the system using rescue boot media.
E. Reinstall the kernel packages.
F. Reinstall the OS.
Answer: DE
Explanation:
– Using rescue boot media lets you boot the machine, mount the existing partitions, and access the corrupted /boot files without reinstalling the OS.
– Reinstalling the kernel packages restores the missing or corrupt files in /boot (e.g., vmlinuz and initramfs), allowing GRUB to load and uncompress the kernel properly.
NEW QUESTION 29
……
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