Provided by:
passwd_4.1.4.1-1ubuntu2_i386 
НАЗВАНИЕ
gshadow - файл с защищаемой информацией о группах
ОПИСАНИЕ
/etc/gshadow contains the shadowed information for group accounts.
Этот файл должен быть недоступен обычному пользователю, если нужно
обеспечить безопасность паролей.
Each line of this file contains the following colon-separated fields:
имя группы
It must be a valid group name, which exist on the system.
шифрованный пароль
Подробней о пароле смотрите на странице руководства crypt(3).
If the password field contains some string that is not a valid
result of crypt(3), for instance ! or *, users will not be able to
use a unix password to access the group (but group members do not
need the password).
The password is used when an user who is not a member of the group
wants to gain the permissions of this group (see newgrp(1)).
This field may be empty, in which case only the group members can
gain the group permissions.
A password field which starts with a exclamation mark means that
the password is locked. The remaining characters on the line
represent the password field before the password was locked.
This password supersedes any password specified in /etc/group.
administrators
It must be a comma-separated list of user names.
Administrators can change the password or the members of the group.
Administrators also have the same permissions as the members (see
below).
members
It must be a comma-separated list of user names.
Members can access the group without being prompted for a password.
You should use the same list of users as in /etc/group.
ФАЙЛЫ
/etc/group
содержит информацию о группах
/etc/gshadow
содержит защищаемую информацию о группах
СМОТРИТЕ ТАКЖЕ
gpasswd(5), group(5), grpck(8), grpconv(8), newgrp(1).