GROUPADD(8) | 系统管理命令 | GROUPADD(8) |
groupadd - 创建一个新组
groupadd [选项] group
The groupadd command creates a new group account using the values specified on the command line plus the default values from the system. The new group will be entered into the system files as needed.
groupadd 命令可以接受的选项有:
-f, --force
-g, --gid GID
See also the -r option and the GID_MAX description.
-h, --help
-K, --key KEY=VALUE
示例:-K GID_MIN=100 -K GID_MAX=499
注意:-K GID_MIN=10,GID_MAX=499 尚不能工作。
-o, --non-unique
-p, --password PASSWORD
-r, --system
The numeric identifiers of new system groups are chosen in the SYS_GID_MIN-SYS_GID_MAX range, defined in login.defs, instead of GID_MIN-GID_MAX.
-R, --root CHROOT_DIR
在 /etc/login.defs 中有如下配置变量,可以用来更改此工具的行为:
GID_MAX (number), GID_MIN (number)
GID_MIN 和 GID_MAX 的默认值分别是 1000 和 60000。
MAX_MEMBERS_PER_GROUP (number)
默认值是 0,意味着组中的成员数没有限制。
此功能(分割组)允许限制组文件中的行长度。这对于确保 NIS 组的行比长于 1024 字符。
如果要强制这个限制,可以使用 25。
注意:分割组可能不受所有工具的支持(甚至在 Shadow 工具集中)。您不应该使用这个变量,除非真的需要。
SYS_GID_MAX (number), SYS_GID_MIN (number)
SYS_GID_MIN 和 SYS_GID_MAX 的默认值分别是 101 和 GID_MIN-1。
/etc/group
/etc/gshadow
/etc/login.defs
It is usually recommended to only use groupnames that begin with a lower case letter or an underscore, followed by lower case letters, digits, underscores, or dashes. They can end with a dollar sign. In regular expression terms: [a-z_][a-z0-9_-]*[$]?
On Debian, the only constraints are that groupnames must neither start with a dash ('-') nor plus ('+') nor tilde ('~') nor contain a colon (':'), a comma (','), or a whitespace (space:' ', end of line: '\n', tabulation: '\t', etc.).
组名最长为 32 个字符。
You may not add a NIS or LDAP group. This must be performed on the corresponding server.
If the groupname already exists in an external group database such as NIS or LDAP, groupadd will deny the group creation request.
groupadd 可能以如下值退出:
0
2
3
4
9
10
chfn(1), chsh(1), passwd(1), gpasswd(8), groupdel(8), groupmod(8), login.defs(5), useradd(8), userdel(8), usermod(8).
2018-07-27 | shadow-utils 4.5 |