docs: Document reserved GID conflicts and altfiles group management - #2461
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A base-image package can reserve a GID a fleet needs for its own group, and the usual groupmod/gpasswd/lgroupadd commands fail confusingly because system groups live in /usr/lib/group (nss-altfiles), not /etc/group -- so people resort to removing the package. Add two subsections to the users-and-groups guide: how to manage membership of a /usr/lib/group-only group, and how to reassign a reserved GID at build time (a config change, not a package removal), fixing both the altfiles source and the sysusers.d declaration. Assisted-by: AI Signed-off-by: Joseph Marrero Corchado <jmarrero@redhat.com>
jeckersb
approved these changes
Sep 14, 2026
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A base-image package can reserve a GID a fleet needs for its own group, and the usual groupmod/gpasswd/lgroupadd commands fail confusingly because system groups live in /usr/lib/group (nss-altfiles), not /etc/group -- so people resort to removing the package.
Add two subsections to the users-and-groups guide: how to manage membership of a /usr/lib/group-only group, and how to reassign a reserved GID at build time (a config change, not a package removal), fixing both the altfiles source and the sysusers.d declaration.
Assisted-by: AI