Question 1

Users are unable to connect to a server using HTTPS. The administrator runs the following command on the remote system:  Then, the administrator runs the following command from a local workstation:  Which of the following steps should the administrator take to address the issue?
A) Start the application to run on port 443
B) Configure the application to run on an active port
C) Allow port 443 through the firewall
D) Update the self-signed certificate

Accepted Answer

The answer of Users are unable to connect to a...

Question 2

A corporate server security policy states, "Ensure password hashes are not readable by non-administrative users." The administrator should check the permissions on which of the following files to ensure the server satisfies this policy?
A) /etc/shadow
B) /etc/passwd
C) /etc/group
D) /etc/security/limits.conf

Accepted Answer

The answer of A corporate server security policy states, "Ensure...

Question 3

A systems administrator has scheduled a system update for a server. The update includes a resynchronization of the package database and updates to the current packages and the system distribution packages. Which of the following commands contains the proper order of this update?
A) apt-get upgrade, apt-get dist-upgrade, apt-get update
B) apt-get update, apt-get upgrade, apt-get dist-upgrade
C) apt-get dist-upgrade, apt-get upgrade, apt-get update
D) apt-get update, apt-get dist-upgrade, apt-get upgrade

Accepted Answer

The answer of A systems administrator has scheduled a system...

Question 4

In which of the following directories is the vmlinuz file located?
A) /boot
B) /etc
C) /bin
D) /proc

Accepted Answer

The vmlinuz file, which is the Linux kernel, is typically located in the /boot directory.

Question 5

A systems administrator wants to install a new application that requires the newmod kernel module. Which of the following commands should the systems administrator use?
A) lsof newmod
B) modinfo newmod
C) lsmod newmod
D) modprobe newmod

Accepted Answer

The answer of A systems administrator wants to install a...

Question 6

A server, which is used to collect data about the network and datacenter environment via SNMP, is running out of space. Which of the following should the server administrator implement to reduce disk utilization?
A) journald
B) Snapshots
C) logrotate
D) tar -cvf

Accepted Answer

The answer of A server, which is used to collect...

Question 7

During the final step of staging new Linux hardware, GRUB2 is installed to the system drive. Which of the following BEST describes the role of GRUB2 in a new Linux installation?
A) It provides a menu for creating administrator task shortcuts.
B) It provides a menu for running special shell scripts.
C) It provides a method to partition a hard drive.
D) It provides a method to pass parameters to the Linux kernel on startup.

Accepted Answer

The answer of During the final step of staging new...

Question 8

A junior systems administrator has generated a PKI certificate for SSH sessions. The administrator would like to configure authentication without passwords to remote systems. Which of the following should the administrator perform?
A) Add the content of id_rsa.pub file to the remote system ~/.ssh/authorized_keys location. Add the content of id_rsa.pub file to the remote system ~/.ssh/authorized_keys location.
B) Add the content of id_rsa file to the remote system ~/.ssh/authorized_keys location. id_rsa location.
C) Add the content of id_rsa file to the remote system ~/.ssh/known_hosts location. ~/.ssh/known_hosts
D) Add the content of id_rsa.pub file to the remote system ~/.ssh/known_hosts location.

Accepted Answer

The correct method to configure SSH key-based authentication is to add the content of the public key file (id_rsa.pub) to the remote system's ~/.ssh/authorized_keys file. This allows the remote system to authenticate the user based on the public key.

Question 9

A Linux user wants to give read-only permissions to a directory and its contents. Which of the following commands will allow the user to accomplish this task?
A) chmod -R 400 /new_directory/
B) chmod -R 600 /new_directory/
C) chmod 400 /new_directory/
D) chmod 600 /new_directory/

Accepted Answer

The answer of A Linux user wants to give read-only...

Question 10

An administrator is reviewing suspicious activity on a server and needs to determine which users logged into the system within the past 24 hours. Which of the following commands should the administrator run to determine this?
A) last
B) who
C) id
D) usermod

Accepted Answer

The answer of An administrator is reviewing suspicious activity on...

Question 11

A Linux administrator is helping the security team troubleshoot an SELinux policy violation incident. Which of the following would be the BEST utility command to display SELinux violation and AVC denial messages?
A) journalctl | grep sealert
B) sealert -a /var/log/audit/audit.log
C) aureport | grep AVC
D) cat /var/log/messages | grep selinux

Accepted Answer

The `sealert -a /var/log/audit/audit.log` command is used to analyze SELinux audit logs and provide detailed information about SELinux policy violations and AVC denials.

Question 12

Users in the payroll department are not configured to use DNS due to security concerns. The users ask the junior Linux administrator to configure their workstations to access the payroll server at 192.168.204.11 by the name "Payroll". Which of the following commands should the administrator issue to meet this request?
A) echo "nameserver 192.168.204.11 #Payroll" >> /etc/resolv.conf
B) echo "net.ipv4.ip_dynaddr=192.168.204.11 Payroll" >> /etc/sysctl.conf
C) echo "192.168.204.11 Payroll" >> /etc/hosts
D) echo 'IPADDR="192.168.204.11" #Payroll' >> /etc/network/interface

Accepted Answer

The /etc/hosts file is used to map IP addresses to hostnames locally on a machine, allowing users to access the server by the name "Payroll" without using DNS.

Question 13

An administrator receives the following message on a remote server: Cannot open display . Which of the following should the administrator have used to log in to the server?
A) xrdp -h server.company.com
B) ssh -X server.company.com
C) xvnc server.company.com
D) rdesktop server.company.com

Accepted Answer

The error "Cannot open display" typically occurs when trying to run graphical applications over a remote connection without proper display forwarding. Using `ssh -X` enables X11 forwarding, allowing graphical applications to be displayed on the local machine.

Question 14

A junior systems administrator is scanning archive.tar files with an antivirus scanner. The administrator is given the following tasks: List all files that are in the files. Extract all files from the Which of the following actions should be performed to meet these requirements? (Choose two.)
A) tar -tvf archive.tar
B) tar -xf archive.tar
C) tar -A archive.tar
D) tar -av archive.tar
E) tar -r archive.tar
F) tar -uvz archive.tar

Accepted Answer

A) 'tar -tvf archive.tar' lists all files in the archive.  B) 'tar -xf archive.tar' extracts all files from the archive.

Question 15

An administrator has a CSV file named hosts.csv . The contents of include the following: 192.168.2.57,lnx1prd.example.com,Linux,Production 192.168.2.58,lnx2prd.example.com,Linux,Production 192.168.1.4,server15.example.com,Windows,Development The administrator needs to create a second comma-separated list of only the Linux server IP addresses. Which of the following commands would achieve this need?
A) for ip in $(grep "Linux" hosts.csv | cut -d"," -f1); do echo -n "$ip,"; done
B) for ip in $( cut -d"," -f1 hosts.csv | grep "Linux"); do echo -n "$ip,"; done
C) for ip in $(grep "Linux" hosts.csv | sed "/$1//'); do echo -n "$ip,"; done
D) for ip in $(awk -F, '{print $1}' hosts.csv | grep "Linux"); do echo -n "$ip,"; done

Accepted Answer

The answer of An administrator has a CSV file named...

Question 16

An administrator wants to know the amount of memory installed on a Linux server. Which of the following commands can be used to accomplish this task?
A) cat /sys/proc/meminfo
B) cat /proc/meminfo
C) cat /proc/sys/meminfo
D) cat /sys/meminfo

Accepted Answer

The answer of An administrator wants to know the amount...

Question 17

A Linux administrator needs to remove a USB drive from a system. The unmount command fails, stating the device is busy. Which of the following commands will show the reason for this error?
A) lsusb | grep /mnt/usb
B) mount | grep /mnt/usb
C) ps aux | grep /mnt/usb
D) lsof | grep /mnt/usb

Accepted Answer

The `lsof` command lists open files and can show which processes are using files on the USB drive, causing it to be busy.

Question 18

An issue was discovered on a testing branch of a Git repository. A file was inadvertently modified and needs to be reverted to the master branch version. Which of the following is the BEST option to resolve the issue?
A) git branch -b master file
B) git merge master testing
C) git stash branch master
D) git checkout master -- file

Accepted Answer

The command `git checkout master -- file` is used to revert a specific file in the current branch to the version in the master branch, effectively undoing the changes made to that file.

Question 19

Which of the following would allow remote users to access a corporate server? (Choose two.)
A) VPN server
B) SMTP server
C) NTP server
D) SSH server
E) DHCP server
F) File server

Accepted Answer

The answer of Which of the following would allow remote...

Question 20

In which of the following Linux GUI environments would the Konsole application MOST likely be found?
A) Gnome
B) KDE
C) Cinnamon
D) Unity
E) MATE

Accepted Answer

Konsole is the default terminal emulator for the KDE desktop environment.

Exam 18: CompTIA Linux+

Users are unable to connect to a server using HTTPS. The administrator runs the following command on the remote system: Then, the administrator runs the following command from a local workstation: Which of the following steps should the administrator take to address the issue?

A corporate server security policy states, "Ensure password hashes are not readable by non-administrative users." The administrator should check the permissions on which of the following files to ensure the server satisfies this policy?

A systems administrator has scheduled a system update for a server. The update includes a resynchronization of the package database and updates to the current packages and the system distribution packages. Which of the following commands contains the proper order of this update?

In which of the following directories is the vmlinuz file located?

A systems administrator wants to install a new application that requires the newmod kernel module. Which of the following commands should the systems administrator use?

A server, which is used to collect data about the network and datacenter environment via SNMP, is running out of space. Which of the following should the server administrator implement to reduce disk utilization?

During the final step of staging new Linux hardware, GRUB2 is installed to the system drive. Which of the following BEST describes the role of GRUB2 in a new Linux installation?

A junior systems administrator has generated a PKI certificate for SSH sessions. The administrator would like to configure authentication without passwords to remote systems. Which of the following should the administrator perform?

A Linux user wants to give read-only permissions to a directory and its contents. Which of the following commands will allow the user to accomplish this task?

An administrator is reviewing suspicious activity on a server and needs to determine which users logged into the system within the past 24 hours. Which of the following commands should the administrator run to determine this?

A Linux administrator is helping the security team troubleshoot an SELinux policy violation incident. Which of the following would be the BEST utility command to display SELinux violation and AVC denial messages?

An administrator receives the following message on a remote server: Cannot open display . Which of the following should the administrator have used to log in to the server?

A junior systems administrator is scanning archive.tar files with an antivirus scanner. The administrator is given the following tasks: List all files that are in the files. Extract all files from the Which of the following actions should be performed to meet these requirements? (Choose two.)

An administrator wants to know the amount of memory installed on a Linux server. Which of the following commands can be used to accomplish this task?

A Linux administrator needs to remove a USB drive from a system. The unmount command fails, stating the device is busy. Which of the following commands will show the reason for this error?

An issue was discovered on a testing branch of a Git repository. A file was inadvertently modified and needs to be reverted to the master branch version. Which of the following is the BEST option to resolve the issue?

Which of the following would allow remote users to access a corporate server? (Choose two.)

In which of the following Linux GUI environments would the Konsole application MOST likely be found?