Linux+ XK0-006 Practice Questions & Answers • ExamPrepare

Question 1

A Linux administrator needs to temporarily open ports for an application that uses TCP ports 3020 through 3022 on a system. Which of the following commands should the administrator issue?

iptables -A OUTPUT --allow --dports 3020-3022 -j ALLOW
ip6tables -A FORWARD -p tcp --sport 3020-3022 -j ACCEPT
firewall-cmd -add -port={3020,3021,3022}/tcp
ufw allow 3020:3022/tcp

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Question 2

Given the following Python function:

with open("test.txt", "r") as f:

print(f.read())

Which of the following is causing this Python script to display an error?

Code must run in a Python virtual environment to prevent errors.
Python syntax requires indentation for the function to run properly.
The method used is only valid in Python version 2.
The variable f does not meet the minimum length of Python variables.

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Question 3

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Question 4

A systems administrator is creating a backup copy of the /home/ directory. Which of the following commands allows the administrator to archive and compress the directory at the same time?

cpio -o /backups/home.tar.xz /home/
rsync -z /backups/home.tar.xz /home/
tar -cJf /backups/home.tar.xz /home/
dd of=/backups/home.tar.xz if=/home/

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Question 5

A Linux administrator wants to make the ENABLE_AUTH variable set to 1 and available to the environment of subsequently executed commands. Which of the following should the administrator use for this task?

let ENABLE_AUTH=1
ENABLE_AUTH=1
ENABLE_AUTH=$(echo $ENABLE_AUTH)
export ENABLE_AUTH=1

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Question 6

A systems administrator is deploying a new secure web server but is having issues starting it. The administrator reviews the following outputs:

# systemctl status -l httpd

httpd.service - The Apache HTTP Server

Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)

Active: failed (Result: exit-code) since Tue 2024-07-09 12:30:05 EDT; 2min 30s ago

Docs: man:httpd.service(8)

Process: 12233 ExecReload=/usr/sbin/httpd $OPTIONS -k graceful (code=exited, status=0/SUCCESS)

[...]

Jul 09 12:30:05 node.comptia.com systemd[1]: httpd.service: Succeeded.

Jul 09 12:30:05 node.comptia.com systemd[1]: Stopped The Apache HTTP Server.

Jul 09 12:30:05 node.comptia.com systemd[1]: Starting The Apache HTTP Server...

Jul 09 12:30:05 node.comptia.com httpd[12233]: (13)Permission denied: AH00072: make_sock: could not bind to address [::]:1234

# getenforce

Enforcing

# semanage port -l

[...]

http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000

pegasus_http_port_t tcp 5988

# getsebool -a

[...]

httpd_can_network_connect --> on

httpd_can_network_connect_cobbler --> off

httpd_can_network_connect_db --> on

Which of the following commands fixes this issue while following security best practices?

setsebool -P http_port_t 1234
setenforce 0
semanage -a -t http_port_t -p tcp 1234
systemctl unmask httpd

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