GROUPADD(8) | 系统管理命令 | GROUPADD(8) |
名称¶
groupadd - 创建一个新组
大纲¶
groupadd [选项] group
描述¶
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.
选项¶
The options which apply to the groupadd command are:
-f, --force
-g, --gid GID
See also the -r option and the GID_MAX description.
-h, --help
-K, --key KEY=VALUE
Example: -K GID_MIN=100 -K GID_MAX=499
Note: -K GID_MIN=10,GID_MAX=499 doesn't work yet.
-o, --non-unique
-p, --password PASSWORD
Note: This option is not recommended because the password (or encrypted password) will be visible by users listing the processes.
您应该确保密码符合系统的密码政策。
-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
-P, --prefix PREFIX_DIR
配置文件¶
The following configuration variables in /etc/login.defs change the behavior of this tool:
GID_MAX (number), GID_MIN (number)
The default value for GID_MIN (resp. GID_MAX) is 1000 (resp. 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)
The default value for SYS_GID_MIN (resp. SYS_GID_MAX) is 101 (resp. GID_MIN-1).
文件¶
/etc/group
/etc/gshadow
/etc/login.defs
CAVEATS¶
Groupnames may begin with lower and upper case letters, digits, underscores, or periods. They may continue with all the aforementioned characters, or dashes. Finally, they can end with a dollar sign. Fully numeric groupnames and groupnames containing only . or .. are disallowed. In regular expression terms: [a-zA-Z0-9_.][a-zA-Z0-9_.-]*[$]?
Groupnames may only be up to 32 characters long.
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.
退出值¶
The groupadd command exits with the following values:
0
2
3
4
9
10
参见¶
chfn(1), chsh(1), passwd(1), gpasswd(8), groupdel(8), groupmod(8), login.defs(5), useradd(8), userdel(8), usermod(8).
2024-04-19 | shadow-utils 4.6 |