Newest CompTIA Linux+ XK0-004 Dumps VCE PDF Test Free
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CompTIA Linux+ practice test free: exam XK0-004
XK0-004Q&As
Q 1
A Linux administrator needs to disable the Sendmail service on a Linux server and prevent it from being started manually and during boot.
Which of the following is the BEST command to do this?
A. systemctl reset-failed sendmail
B. systemctl mask sendmail
C. systemctl stop sendmail
D. systemctl disable sendmail
Correct Answer: C
Q 2
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:
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 –s
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