20+ practice questions focused on Manage users and groups — one of the most tested topics on the Red Hat Certified System Administrator EX200 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Manage users and groups PracticeA system administrator needs to ensure that a user named 'bob' can access a shared directory '/data' owned by group 'developers'. The directory has permissions 2775 and is owned by root:developers. Bob is a member of the 'developers' group. However, when Bob tries to create a file in '/data', it fails with 'Permission denied'. What is the most likely cause?
Explanation: The directory '/data' has permissions 2775, which grants read, write, and execute to the group 'developers'. Bob is a member of 'developers', so standard Unix permissions should allow him to create files. However, the failure with 'Permission denied' despite correct group membership and permissions strongly indicates that SELinux is enforcing a policy that denies Bob write access. The most likely cause is that the directory lacks the correct SELinux context (e.g., `default_t` instead of a type like `public_content_rw_t` or a context that allows write operations).
A company policy requires that when a user is deleted, all files owned by that user in /home should be reassigned to a 'guest' account. Which command accomplishes this?
Explanation: Option B uses `find` to locate all files owned by `olduser` under `/home` and then executes `chown guest` on them, which reassigns ownership to the `guest` account. This directly satisfies the policy requirement without affecting the user account itself or copying files.
An administrator wants to add the user 'jane' to the supplementary groups 'wheel' and 'docker' without removing her from other groups. Which command should be used?
Explanation: Option B is correct because the `usermod -aG` command appends the user 'jane' to the supplementary groups 'wheel' and 'docker' without removing her from any existing supplementary groups. The `-a` (append) flag must be used with `-G` to avoid overwriting the current group membership list, which is the default behavior of `-G` alone.
A server has a requirement that all users in the 'finance' group must have a password aging policy that forces password change every 90 days. Which approach best achieves this for existing users?
Explanation: Option D is correct because `chage -M 90` sets the maximum password age for a specific user, and by scripting it to apply to all members of the 'finance' group, you directly enforce the 90-day policy on existing users. This approach works regardless of the default settings in `/etc/login.defs`, which only affect new users, and avoids the manual and error-prone editing of `/etc/shadow`.
Which TWO commands can change the primary group of an existing user?
Explanation: The `usermod -g` command (not `-aG`, which adds supplementary groups) changes the primary group of an existing user. The `gpasswd -a` command adds a user to a group, but it does not change the primary group; it only affects supplementary group membership. Therefore, neither option A nor B is correct for changing the primary group. The correct commands are `usermod -g` (to set the primary group) and `usermod -G` (to set supplementary groups, but not the primary).
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2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Manage users and groups questions on the EX200 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
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