XK0-006 Services and User Management Practice Question
A Linux administrator needs to grant the user 'alice' the ability to run all commands as root without being prompted for a password, but only from the host 'server1'. Which entry in /etc/sudoers accomplishes this?
⚠ Common exam trap
The trap here is mixing up the host and runas fields, or misplacing the NOPASSWD tag relative to the command list.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
alice server1=(ALL) NOPASSWD: ALL
The sudoers file uses the format user host=(runas) command. To allow alice to run all commands as root without a password only on server1, the correct entry is 'alice server1=(ALL) NOPASSWD: ALL'. The host field restricts the rule to server1, and NOPASSWD: ALL removes the password requirement for all commands.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
alice server1=(root) NOPASSWD: /bin/bash
Why it's wrong here
This entry only permits running /bin/bash as root without a password, not all commands. While it provides a shell, it does not grant the ability to run all commands directly via sudo, and the requirement is to run all commands as root.
- ✓
alice server1=(ALL) NOPASSWD: ALL
Why this is correct
This sudoers entry allows alice to run any command as any user on the host server1 without a password. The host specification 'server1' restricts the rule to that host, and NOPASSWD: ALL removes the password prompt for all commands.
- ✗
alice ALL=(server1) NOPASSWD: ALL
Why it's wrong here
This entry attempts to specify server1 as the runas user, which is invalid because the runas list must contain user names, not hostnames. The host part is 'ALL', meaning the rule applies on all hosts, which is not the intended restriction.
- ✗
alice ALL=(ALL) NOPASSWD: server1
Why it's wrong here
This entry specifies 'server1' as a command, which is invalid because commands must be absolute paths. It would allow alice to run a command named 'server1' on all hosts without a password, which is not the intended behavior and likely fails.
Go deeper
Related to this question
Learn chapter
User and Group Administration
Key term
Linux
Linux is an open-source operating system that manages computer hardware and software, widely used in servers, desktops, and embedded systems.
Key term
User
A user is any person, system, or device that interacts with an IT service, resource, or identity system, typically authenticated through credentials and authorized to perform specific actions.
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JA
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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