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shadow-utils 4.8.1
2020-03-24
Aliases: sg(1), sg(1), sg(1), sg(1)

login

system login tools

shadow-utils

Utilities for managing accounts and shadow password files

man-pages-zh_cn

Simplified Chinese Linux man pages

util-linux

Miscellaneous system utilities for Linux

shadow

Password and account management tool suite with support for shadow files and PAM

名称

newgrp - 登录到一个新组

大纲

newgrp [-] [group]

描述

The newgrp command is used to change the current group ID during a login session. If the optional - flag is given, the users environment will be reinitialized as though the user had logged in, otherwise the current environment, including current working directory, remains unchanged.
newgrp changes the current real group ID to the named group, or to the default group listed in /etc/passwd if no group name is given. newgrp also tries to add the group to the user groupset. If not root, the user will be prompted for a password if she does not have a password (in /etc/shadow if this user has an entry in the shadowed password file, or in /etc/passwd otherwise) and the group does, or if the user is not listed as a member and the group has a password. The user will be denied access if the group password is empty and the user is not listed as a member.
If there is an entry for this group in /etc/gshadow, then the list of members and the password of this group will be taken from this file, otherwise, the entry in /etc/group is considered.

配置文件

The following configuration variables in /etc/login.defs change the behavior of this tool:
SYSLOG_SG_ENAB (boolean)
Enable "syslog" logging of sg activity.

文件

/etc/passwd
用户账户信息。
/etc/shadow
安全用户账户信息。
/etc/group
组账户信息。
/etc/gshadow
安全组账户信息。
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