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XK0-006 Security Practice Question
An administrator wants to allow the user 'ops' to run only the command '/usr/bin/systemctl restart httpd' via sudo on a specific host 'webserver'. Which /etc/sudoers entry is correct?
⚠ Common exam trap
The trap is misplacing the host or runas fields, or using ALL where specificity is required; candidates must match the exact host and command restrictions stated in the question.
Correct answer & explanation
The sudoers entry format is: user host=(runas) command. To allow user 'ops' to run only the specified command on host 'webserver' as root, the correct entry is 'ops webserver=(root) /usr/bin/systemctl restart httpd'. This restricts both the host and the command, and specifies the runas user as root.
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User and Group Administration
Key term
systemctl
systemctl is the command-line tool used to inspect, start, stop, enable, or disable services managed by the systemd init system in Linux.
Key term
sudo
sudo is a command-line utility in Unix-like operating systems that allows a permitted user to execute a program as another user, typically the superuser (root), based on security policy settings.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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