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Security

Security is a critical component of managing Linux services and listed below are some of the objectives you should know to pass XK0-004 test:

• Summarizing the security best practices commonly used within a Linux environment and explaining their peculiarities;
• Implementing logging services and various Linux log files;
• Implementing and configuring Linux firewalls with ACL;
• Configuring and implementing the right authentication and access methods like PAM, and using Linux commands such as TTY, PTY, and SSH.

What is the duration of the XK0-004 Exam

• Number of Questions: 90
• Passing score: 720
• Length of Examination: 90 minutes
• Format: Multiple choices, multiple answers

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Who Is It Meant for?

The CompTIA XK0-004 exam should be attempted by early-career administrators whose role involves supporting Linux systems. Ideally, any IT pro who will be using Linux to manage everything on a day to day basis under the cybersecurity, cloud, web, and mobile administration applications can benefit from this certification. If you already understand basic hardware, operating systems, and software concepts and wish to upgrade your knowledge through Linux training, this is the most suitable path then.

CompTIA Linux+ Certification Exam Sample Questions (Q327-Q332):

NEW QUESTION # 327
A systems administrator is implementing disk quotas on /home. During the process, the administrator receives the following error:
Cannot find filesystem to check or filesystem not mounted with user quota option.
Which of the following is the correct order of steps the administrator should follow to resolve this error?

• A. 1. Verify if /home has quotas enabled in /etc/fstaband, if not, enable it.
  2. Remount /home.
  3. Create the quota database files and generate the disk usage table.
  4. Assign user quota policies.
• B. 1. Assign user quota policies.
  2. Verify if /home has quotas enabled in /etc/fstaband, if not, enable it.
  3. Create the quota database files and generate the disk usage table.
  4. Remount /home.
• C. 1. Create the quota database files and generate the disk usage table.
  2. Verify if /home has quotas enabled in /etc/fstaband, if not, enable it.
  3. Remount /home.
  4. Assign user quota policies.
• D. 1. Verify if /homehas quotas enabled in /etc/fstaband, if not, enable it.
  2. Create the quota database files and generate the disk usage table.
  3. Remount /home.
  4. Assign user quota policies.

Answer: A Explanation:
Explanation/Reference: https://www.howtoforge.com/community/threads/quotacheck-cannot-find-filesystem-to- check.25954/
NEW QUESTION # 328
An administrator is setting UP a NAT gateway. Two interfaces have been configured:

The firewall configuration has been completed:

The IP forwarding configuration parameter is:

When testing the NAT from a workstation, the administrator encounters an issue:

Which of the following is the MOST likely cause of the packet loss?

• A. IPv4 forwarding has not been enabled on the NAT gateway
• B. The MASQUERADE source and destination are in the incorrect order,
• C. The firewall is blocking the connection.
• D. The etho interface is wrong.

Answer: B
NEW QUESTION # 329
A Linux administrator needs the "tech" account to have the option to run elevated commands as root.
Which of the following commands would BEST meet this goal?

• A. # groupadd -u tech -g root
• B. $ su - tech -c "/bin/bash"
• C. # usermod -aG wheel tech
• D. # sudo -i tech

Answer: C
NEW QUESTION # 330
A system administrator has discovered a drive is malfunctioning and needs to be replaced in a server. The administrator lists properties of the exiting storage before attempting the replacement:

After replacing the malfunctioning drive, which of the following is the BEST way to create the proper partition table on the new drive?

• A. Fdis.dev/sdb< echo p; echo d; eacho w)
• B. Parted -a optimal /dev/sdb primary 0% 2000MB
• C. Sfdisk -dev/sda| sfdisk/dev/sdb
• D. Mkpart primary 1MB 2000MB /dev/sdb

Answer: A
NEW QUESTION # 331
The following tools help maintain consistency across different systems in an infrastructure:
SUSE Manager
Red Hat Satellite
Spacewalk
If a system file is changed, the tools roll back the file to a predefined configuration.
Which of the following concepts BEST describes this behavior?

• A. Automated configuration management
• B. Agentless system management
• C. Build automation
• D. Infrastructure as code

Answer: C
NEW QUESTION # 332
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