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CompTIA Linux+ certification is a valuable credential for IT professionals looking to advance their careers in the field of Linux administration. It is recognized by many employers and can open up new job opportunities in various industries. As Linux continues to grow in popularity and become more widely used in enterprise environments, the demand for skilled Linux administrators is also increasing. Obtaining the CompTIA Linux+ certification can help individuals stand out in the job market and demonstrate their proficiency in this important operating system.

CompTIA Linux+ Certification Exam Sample Questions (Q158-Q163):

NEW QUESTION # 158
A Linux system is getting an error indicating the root filesystem is full. Which of the following commands should be used by the systems administrator to resolve this issue? (Choose three.)

• A. parted -l /dev/mapper/rootvg-rootlv
• B. growpart /dev/mapper/rootvg-rootlv
• C. lsblk /dev/sda
• D. lvresize -L +10G -r /dev/mapper/rootvg-rootlv
• E. df -h /
• F. pvcreate /dev/sdb
• G. fdisk -1 /dev/sdb
• H. vgextend /dev/rootvg /dev/sdb

Answer: B,D,E

 

NEW QUESTION # 159
A systems administrator made some unapproved changes prior to leaving the company. The newly hired administrator has been tasked with revealing the system to a compliant state. Which of the following commands will list and remove the correspondent packages?

• A. dnf remove and dnf check
• B. dnf list and dnf remove last
• C. dnf info and dnf upgrade
• D. dnf history and dnf history undo last

Answer: D

Explanation:
The commands that will list and remove the corresponding packages are dnf history and dnf history undo last. The dnf history command will display a list of all transactions performed by dnf, such as installing, updating, or removing packages. Each transaction has a unique ID, a date and time, an action, and a number of altered packages. The dnf history undo last command will undo the last transaction performed by dnf, meaning that it will reverse all package changes made by that transaction. For example, if the last transaction installed some packages, dnf history undo last will remove them.
The other options are not correct commands for listing and removing corresponding packages. The dnf list command will display a list of available packages in enabled repositories, but not the packages installed by dnf transactions. The dnf remove command will remove specified packages from the system, but not all packages from a specific transaction. The dnf info command will display detailed information about specified packages, but not about dnf transactions. The dnf upgrade command will upgrade all installed packages to their latest versions, but not undo any package changes. Reference: Handling package management history; dnf(8) - Linux manual page

 

NEW QUESTION # 160
An engineer needs to insert a character at the end of the current line in the vi text editor. Which of the following will allow the engineer to complete this task?

• A. A
• B. i
• C. r
• D. p
• E. bb

Answer: A

Explanation:
The vi text editor is a popular and powerful tool for editing text files on Linux systems. The vi editor has two modes: command mode and insert mode. In command mode, the user can issue commands to manipulate the text, such as moving the cursor, deleting, copying, pasting, searching, replacing, and saving. In insert mode, the user can type text into the file. To switch from command mode to insert mode, the user can press various keys, such as i, a, o, I, A, or O.
To switch from insert mode to command mode, the user can press the Esc key.
To insert a character at the end of the current line in the vi editor, the user can press the A key in command mode. This will move the cursor to the end of the line and switch to insert mode. Then, the user can type the desired character and press Esc to return to command mode.

 

NEW QUESTION # 161
A DevOps engineer needs to allow incoming traffic to ports in the range of 4000 to 5000 on a Linux server.
Which of the following commands will enforce this rule?

• A. iptables -t filter -A INPUT -p tcp --dport 4000:5000 -j ACCEPT
• B. iptables filter -S INPUT -p tcp --dport 4000:5000 -A ACCEPT
• C. iptables -f filter -I INPUT -p tcp --dport 4000:5000 -A ACCEPT
• D. iptables filter -A INPUT -p tcp --dport 4000:5000 -D ACCEPT

Answer: A

Explanation:
The command iptables -t filter -A INPUT -p tcp --dport 4000:5000 -j ACCEPT will enforce the rule of allowing incoming traffic to ports in the range of 4000 to 5000 on a Linux server. The iptables command is a tool for managing firewall rules on Linux systems. The -t option specifies the table to operate on, in this case filter, which is the default table that contains the rules for filtering packets. The -A option appends a new rule to the end of a chain, in this case INPUT, which is the chain that processes the packets that are destined for the local system. The -p option specifies the protocol to match, in this case tcp, which is the transmission control protocol. The --dport option specifies the destination port or port range to match, in this case 4000:
5000, which is the range of ports from 4000 to 5000. The -j option specifies the target to jump to if the rule matches, in this case ACCEPT, which is the target that allows the packet to pass through. The command iptables -t filter -A INPUT -p tcp --dport 4000:5000 -j ACCEPT will add a new rule to the end of the INPUT chain that will accept the incoming TCP packets that have a destination port between 4000 and
5000. This command will enforce the rule and allow the traffic to the specified ports. This is the correct command to use to accomplish the task. The other options are incorrect because they either use the wrong options (-f instead of -t or -D instead of -A) or do not exist (iptables filter -A INPUT -p tcp --dport 4000:5000
-D ACCEPT or iptables filter -S INPUT -p tcp --dport 4000:5000 -A ACCEPT). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 18: Securing Linux Systems, page 543.

 

NEW QUESTION # 162
A Linux systems administrator is working to obtain the installed kernel version of several hundred systems. Which of the following utilities should the administrator use for this task?

• A. Bash
• B. Ansible
• C. Git
• D. Docker

Answer: B

Explanation:
Ansible is an open-source automation tool that can manage multiple systems simultaneously.
Using an Ansible playbook, the administrator can run commands across several servers to obtain the installed kernel version efficiently. A simple ansible all -m command -a "uname -r" will retrieve the kernel version from all target systems.

 

NEW QUESTION # 163
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