LFCS User and Group Management Practice Question
Which THREE fields are part of a standard /etc/group entry?
⚠ Common exam trap
It's easy for candidates to confuse the fields of /etc/group with those of /etc/passwd, mistakenly thinking that a group entry includes a primary GID or home directory, which are user-specific attributes stored in /etc/passwd.
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
✓
Group password (often 'x')
A standard /etc/group entry has four colon-separated fields: group name, group password, group ID (GID), and group members list. Option C (group name) is correct because the first field of each /etc/group line is the group's name, such as 'sudo' or 'developers'. Option A (group password, often 'x') is correct because the second field holds the group password placeholder, typically 'x' when shadow group passwords are used via /etc/gshadow. Option E (group members list) is correct because the fourth field is a comma-separated list of supplementary members of the group. Option B (primary GID of user) is not part of /etc/group; a user's primary GID is stored in the fourth field of /etc/passwd. Option D (home directory of group) does not exist in /etc/group; home directories are per-user fields in /etc/passwd, not per-group fields.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Group password (often 'x')
Why this is correct
The group password field, usually shown as 'x', occupies the second colon-separated position in /etc/group, between the group name and GID. It satisfies the stem's requirement for a standard field, since shadowed group passwords live in /etc/gshadow while this placeholder remains in the entry.
- ✗
Primary GID of user
Why it's wrong here
Not stored in group file; that's in passwd.
- ✓
Group name
Why this is correct
The group name is the first colon-separated field in every /etc/group line, preceding the optional password placeholder, the numeric GID, and the comma-separated member list. Without it, tools such as `getent group` and `chgrp` could not map a textual group to its GID, so it satisfies the stem's requirement for a standard field.
- ✗
Home directory of group
Why it's wrong here
Groups do not have home directories.
- ✓
Group members list
Why this is correct
The fourth colon-separated field of an /etc/group line holds the comma-separated usernames of supplementary members, satisfying the requirement for a standard field. Primary membership is recorded in /etc/passwd instead, so this list excludes users whose primary group is the entry's GID.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LFCS practice question is part of Courseiva's free Linux Foundation certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LFCS exam.