名 称
gpasswd - administer /etc/group and /etc/gshadow
大 纲
|
gpasswd [option] group |
描 述
The gpasswd command is used to administer /etc/group, and /etc/gshadow. Every group can have administrators, members and a password.
System administrators can use the -A option to define group administrator(s) and the -M option to define members. They have all rights of group administrators and members.
gpasswd called by a group administrator with a group name only prompts for the new password of the group.
If a password
is set the members can still use newgrp(1) without a
password, and non-members must supply the password.
请 注 意 组 密 码
Group passwords are an inherent security problem since more
than one person is permitted to know the password. However,
groups are a useful tool for permitting co-operation between
different users.
选 项
Except for the -A and -M options, the options cannot be combined.
The options which apply to the gpasswd command are:
-a, --add user
Add the user to the named group.
-d, --delete user
Remove the user from the named group.
-h, --help 显 示 帮 助 信 息 并 退 出 。
-Q, --root CHROOT_DIR
Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory. Only absolute paths are supported.
-r, --remove-password
Remove the password from the named group. The group password will be empty. Only group members will be allowed to use newgrp to join the named group.
-R, --restrict
Restrict the access to the named group. The group password is set to "!". Only group members with a password will be allowed to use newgrp to join the named group.
-A, --administrators user,... 设 置 有 管 理 权 限 的 用 户 列 表 。
-M, --members user,... 设 置 组 成 员 列 表 。
CAVEATS
This tool only operates on the /etc/group and /etc/gshadow files. Thus you cannot change any NIS or LDAP group. This must be performed on the corresponding server.
配 置 文 件
The following configuration variables in /etc/login.defs change the behavior of this tool:
文 件
/etc/group 组 账 户 信 息 。
/etc/gshadow 安 全 组 账 户 信 息 。
参 见
newgrp(1), groupadd(8), groupdel(8), groupmod(8), grpck(8), group(5), gshadow(5).