The /etc/group file stores information about user groups. Each line has four colon-separated fields: group name, password placeholder, Group ID (GID), and a comma-separated list of members. In this entry, qa_team is the group name, x indicates the group password is in /etc/gshadow, 1010 is the GID, and lisa,raj are the users who have qa_team as a supplementary group. A user's primary group is defined in the /etc/passwd file, not in the user list of the /etc/group file.
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CompTIA Linux+ XK0-006 (V8)
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