Free XK0-004 Sample Questions — CompTIA Linux+

An administrator needs to create a file named hello in the home directory that contains the following text: it's me! Which of the following commands would accomplish this goal?

• A. mkdir ~/hello touch ~/"it's me!"
• B. touch ~/hello echo "it's me!" > ~/hello
• C. mv ~/hello cp "it's me!" > ~/hello
• D. type ~/hello print "it's me!"

An administrator notices that a long-running script, /home/user/script.sh, is taking up a large number of system resources. The administrator does not know the script's function. Which of the following commands should the administrator use to minimize the script's impact on system resources?

• A. renice
• B. kill
• C. bg
• D. nohup

A Linux administrator is setting up a testing environment and needs to connect to a separate testing server using the production server name. The administrator needs to override the hostname that the DNS is returning in order to use the test environment. Which of the following commands should be run on each of the testing systems to BEST meet this goal?

• A. # hostnamectl set-hostname "192.168.1.100 production.company.com"
• B. # grep ""i IP "${ip addr show} production.company.com" > /etc/resolv.conf
• C. # ip addr add 192.168.1.100/24 dev eth0 && rndc reload production.company.com
• D. # echo "192.168.1.100 production.company.com" >> /etc/hosts

A site reliability engineer updated the latest configuration management scripts and committed them to a workstream called either test or patch. A Linux administrator wants to ensure these latest workstreams are able to be retrieved to the server. Which of the following is the BEST Git attribute to use?

• A. branch
• B. fetch
• C. log
• D. pull

A systems administrator suspects a process with a PID of 2864 is consuming resources at an alarming rate. The administrator uses the command renice -n - 5 -p2864, but it does not solve the issue. Which of the following commands should the administrator execute to correct the issue?

• A. nice -n 5 -p 2864
• B. nice -n -5 -p 2864
• C. renice -n 10 -p 2864
• D. renice -n -10 -p 2864

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/

A Linux administrator is troubleshooting an issue with a shell script. Users in the accounting department are unable to run the script, but users in the sales department are not having issues. Users in both departments should be able to run the script. The administrator checks the permissions on the script and receives the following information: -r-xr-xr-- joe sales script.sh Which of the following commands should the administrator execute to resolve the problem?

• A. chgrp accounting script.sh
• B. chmod 644 script.sh
• C. chown accounting script.sh
• D. chmod a+x script.sh

Using which of the following control mode commands is the correct way to substitute all occurrences of /dev/sdc with /dev/sdd while editing a file in vi?

• A. :s//dev/sdc//dev/sdd
• B. :s/\/dev\/sdc/\/dev\/sdd/g
• C. :s/\/dev\/sdc/\/dev\/sdd
• D. :%s/\/dev\/sdc/\/dev\/sdd

Which of the following commands would show the default printer on a Linux system?

• A. lpr
• B. lpq
• C. lpstat
• D. lspci

A systems administrator wants to mount an ISO to access its content. Using /mnt as a mount point, which of the following is the correct syntax?

• A. mount -o iso9660 /dev/sr0 /mnt
• B. mount -o loop -t iso /mnt
• C. mount -o loop /tmp/image.iso /mnt
• D. mount -o loop /dev/kvm /mnt

The development team has automated their software build process so each time a change is submitted to the source code repository, a new software build is compiled. They are requesting that the Linux operations team look into automating the deployment of the software build into the test environment. Which of the following is the benefit to the development team for implementing deployment automation?

• A. To ensure the build commits are also deployed to the test environment
• B. To enable notifications when builds are deployed to the test environment
• C. To ensure software builds in test are not accidentally deployed to production
• D. To streamline the deployment process for deploying builds into test environments

A Linux administrator is creating a new local Linux user account for a web application. The account has the following requirements: • Use /var/www as the home directory • Have the service_accounts group as its primary group • Have the www user group as a secondary group • Disable the account when the password expires Which of the following BEST meets these requirements?

• A. useradd -D /var/www/ -g service_accounts -G www -e 0
• B. useradd -d /var/www/ -G service_accounts -f www -g 0
• C. useradd -D /var/www -G service_accounts -g www -e 0
• D. useradd -d /var/www/ -g service_accounts –G www -f 0

Which of the following is true about Type 2 hypervisors?

• A. Type 2 hypervisors run on top of another general purpose OS
• B. Type 2 hypervisors are often called bare-metal or native hypervisors
• C. Type 2 hypervisors offer a performance increase to the guests in comparison to a Type 1 hypervisor
• D. Only Type 2 hypervisors allow direct access to CPU virtualization features

Given that a company's policy states that users cannot install third-party tools on Window servers, which of the following protocols will allow a Linux GUI to connect to a Windows server?

• A. VNC
• B. NX
• C. RDP
• D. X11

After connecting a USB drive, the system is unable to detect it. There is no entry in /dev, and there is no information in the message log. Which of the following is the issue?

• A. The USB drive is formatted as a DVD
• B. The USB drive is not formatted
• C. The kernel module is not installed
• D. The permissions of /dev/usb are incorrect

Which of the following is the purpose of the monitoring server role?

• A. To aggregate web traffic to watch which websites employees are visiting
• B. To collect status and performance information about the servers in an environment
• C. To provide user authentication services to a network
• D. To provide real-time analysis of potential threats to the organization

Which of the following allows communication over port 3389 to access GUI services?

• A. XRDP
• B. VNC
• C. Xfce
• D. KDE
• E. X-forwarding

An administrator needs to deploy 100 identical CentOS workstations via PXE boot. Which of the following should the administrator use to minimize the amount of interaction with the consoles needed?

• A. Kickstart script
• B. Ghost image on a distribution server
• C. Hard disk duplicator
• D. Hard disk duplicator
• E. Ubiquity script

An administrator is setting up a script named script.sh to be executed daily at 3:15 a.m. Which of the following is the correct way to define this in crontab?

• A. * * * 15 3 script.sh
• B. 3 15 * * * script.sh
• C. * * * 3 15 script.sh
• D. 15 3 * * * script.sh

After running an Nmap scan on a local area network, a penetration tester notices several older Linux servers have port 23 open. Which of the following should the systems administrator do as a security best practice?

• A. Use a non-standard port for Telnet
• B. Disable and uninstall the Telnet service
• C. Ensure the kernels are up to date with the latest patches
• D. Configure the firewall to allow Telnet access only from trusted networks