LFCS User and Group Management Practice Question
Which THREE of the following statements about the user private group (UPG) scheme are true?
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
✓
It is the default scheme in Red Hat-based distributions.
Options A, D, and E are true. A: It is the default scheme in Red Hat-based distributions. D: It ensures that new files have a default group of the user's private group. E: Each user is assigned a unique group with the same name as the username. B is false because umask 0027 gives group read permission, not denies it. C is false because the primary group is the user's private group, not a system group.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It is the default scheme in Red Hat-based distributions.
Why this is correct
Red Hat-based distributions like RHEL, CentOS, and Fedora use User Private Groups (UPG) by default, where each user is assigned a unique private group with the same name as the username.
- ✗
The umask 0027 ensures files created are NOT readable by the group.
Why it's wrong here
umask 0027 means the default permissions subtract 0027 from the base permissions. For files (base 666), this results in 640 (owner read/write, group read, others none). So group read permission is granted, not denied. To deny group read, umask would need to be 0037 or higher.
- ✗
The primary group of a user is a system group with GID less than 1000.
Why it's wrong here
In UPG scheme, the primary group is the user's private group, which has a GID usually matching the UID (often >= 1000 for regular users). System groups have GID < 1000 and are not used as primary groups for regular users under UPG.
- ✓
It ensures that new files have a default group of the user's private group.
Why this is correct
Because the user's private group is their primary group, any new file created by the user will be associated with that private group by default, allowing easier collaborative access.
- ✓
Each user is assigned a unique group with the same name as the username.
Why this is correct
Under UPG, a user is created with a private group having the same name as the username, and this group is set as the user's primary group.
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