The Secret Of CompTIA XK0-004 Braindumps

NEW QUESTION 1
A Linux server needs to be accessed, but the root password is not available.
Which of the following would BEST allow an administrator to regain access and set a new known password at the same time?

• A. Boot into a single-user mode and reset the password via the passwd command.
• B. Boot into a single-user mode and reset the password by editing the /etc/passwd file.
• C. Boot into a single-user mode and reset the password by editing the /etc/shadow file.
• D. Boot into a single-user mode and reset the password via the chage command.

Answer: A

NEW QUESTION 2
A Linux systems administrator needs to set permissions on an application with the following parameters: The owner of the application should be able to read, write, and execute the application.
Members of the group should be able to read and execute the application. Everyone else should not have access to the application.
Which of the following commands would BEST accomplish these tasks?

• A. chmod 710 <application name>
• B. chmod 730 <application name>
• C. chmod 750 <application name>
• D. chmod 760 <application name>

Answer: D

NEW QUESTION 3
A junior administrator of a physical server receives log messages indicating the out-of-memory killer has been active. All memory slots are in use on the motherboard, but additional disk space is available. Space has been allocated for a swap file.
Which of the following should the administrator use to reduce the output of memory messages?

• A. free : swapoff / swapfile ; swapon -a
• B. mkswap /swapfile; swapon –a
• C. fallocate –l 2G /swapfile && swapon –a
• D. echo “1” > /proc/meninfo ; swapon / swapfile

Answer: A

NEW QUESTION 4
A Linux administrator has installed a web application firewall in front of a web server running on HTTP port 8080 and successfully started the HTTP server. However, after opening the application URL in an Internet browser, the administrator discovered that the application does not work. The administrator performed the following diagnostic steps:
Output of sysctl -a command:

Output of iptables -L command:

Output of netstat –nltop | grep "8080":

Which of the following is the NEXT step the administrator should perform to permanently fix the issue at the kernel level?

• A. sysctl -w net.ipv4.ip_forward=1 then run sysctl -w /etc/sysctl.conf to enable the change
• B. Edit /etc/sysctl.conf file and add net.ipv4.ip_forward = 1 then run sysctl -p /etc/ sysctl.conf to enable the change
• C. Add iptables rule iptables -A INPUT -m state --state NEW -p tcp --dport 8080 -j then restart httpd daemon
• D. Add iptables rule iptables -A FORWARD-m state --state NEW -p tcp --dport 8080 –j ACCEPT then restart httpd daemon

Answer: D

NEW QUESTION 5
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

Answer: A

NEW QUESTION 6
Which of the following is a difference between YAML and JSON?

• A. Users can comment in YAML but not in JSON
• B. JSON only curly brackets, while YAML only uses square brackets
• C. JSON is used in web development, while YAML is used solely in back-end systems.
• D. YAML has been deprecated for JSON.

Answer: A

NEW QUESTION 7
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

Answer: D

NEW QUESTION 8
A Linux administrator is testing connectivity to a remote host on a shared terminal. The administrator wants to allow other users to access the terminal while the command is executing.
Which of the following commands should the administrator use?

• A. bg ping remotehost
• B. fg ping remotehost
• C. ping remotehost < results
• D. ping remotehost &

Answer: C

NEW QUESTION 9
A company wants to ensure that all newly created files can be modified only by their owners and that all new directory content can be changed only by the creator of the directory. Which of the following commands will help achieve this task?

• A. umask 0022
• B. umask 0012
• C. chmod –R 0644 /
• D. chmod –R 0755 /

Answer: A

NEW QUESTION 10
A server is almost out of free memory and is becoming unresponsive. Which of the following sets of commands will BEST mitigate the issue?

• A. free, fack, partprobe
• B. lsof, lvcreate, mdadm
• C. df, du, rmmod
• D. fdisk, mkswap, swapon -a

Answer: A

NEW QUESTION 11
A member of the production group issues the following command:
echo "Monday through Friday" > /production_docs/days
The command fails to execute, so the user obtains the following output: drwxr--r-- root production 0 Jun 16 2018 production
-rw-r--r-- production production 4096 Jun 14 2018 days
Which of the following commands should the user execute to BEST fix the issue?

• A. chmod g+w production to change the permissions of the days file
• B. chgrp root production_docs/days to change the group ownership of the production_docs/ days file
• C. chmod g+S production to set the GUID on the production_docs directory
• D. chown production to change the ownership of the production_docs directory

Answer: D

NEW QUESTION 12
Which of the following are Linux desktop managers? (Choose two.)

• A. KDE
• B. GNOME
• C. GUI
• D. VNC
• E. X11
• F. SPICE

Answer: AB

NEW QUESTION 13
A Linux administrator needs every new file created on a directory to maintain the group permissions of the same directory. Which of the following commands would satisfy this requirement?

• A. chmod o+s <directory>
• B. chmod u+s <directory>
• C. chmod +s <directory>
• D. chmod g+s <directory>

Answer: D

NEW QUESTION 14
A junior Linux administrator is installing patches using YUM. The administrator issues the following command:
yum list installed
The output of the command is as follows:

Given this scenario and the output, which of the following should the administrator do to address this issue?

• A. renice –n 9 –p 5180
• B. killall yum
• C. ps –ef | grep yum
• D. top | grep yum

Answer: C

NEW QUESTION 15
As a Systems Administrator, to reduce disk space, you were tasked to create a shell script that does the following:
Add relevant content to /tmp/script.sh, so that it finds and compresses rotated files in /var/log without recursion.
INSTRUCTIONS
Fill the blanks to build a script that performs the actual compression of rotated log files.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

• A. Yes
• B. Not Mastered

Answer: A

NEW QUESTION 16
A systems administrator wants to deploy several applications to the same server quickly. Each application should be abstracted from the host with its own dependencies and libraries and utilize a minimal footprint.
Which of the following would be BEST in this scenario?

• A. Virtual machines
• B. Type 2 hypervisor
• C. Chroot jails
• D. Containers

Answer: D

NEW QUESTION 17
After installing a new web server, you are unable to browse to the default web page. INSTRUCTIONS
Review all the command output and select the command needed to remediate the issue.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

• A. Yes
• B. Not Mastered

Answer: A

NEW QUESTION 18
A Linux administrator retrieved a repository of files from a Git server using git clone. The administrator wants to see if a configuration file was added to the repository. Which of the following Git arguments should be used to see the recent modifications?

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

Answer: D

NEW QUESTION 19
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