GROUPADD
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大纲
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CAVEATS
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groupadd − å建ä¸ä¸ªæ°ç»
大纲
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groupadd [é项] group |
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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.
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−f, −−force
This option causes the command to simply exit with success status if the specified group already exists. When used with −g, and the specified GID already exists, another (unique) GID is chosen (i.e. −g is turned off).
−g, −−gid GID
The numerical value of the group’s ID. This value must be unique, unless the −o option is used. The value must be non−negative. The default is to use the smallest ID value greater than or equal to GID_MIN and greater than every other group.
See also the −r option and the GID_MAX description.
−h, −−help
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−K, −−key KEY=VALUE
Overrides /etc/login.defs defaults (GID_MIN, GID_MAX and others). Multiple −K options can be specified.
示ä¾ï¼−K GID_MIN=100 −K GID_MAX=499
注æï¼−K GID_MIN=10,GID_MAX=499 å°ä¸è½å·¥ä½ã
−o, −−non−unique
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−p, −−password PASSWORD
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−r, −−system
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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
Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.
−P, −−prefix PREFIX_DIR
Apply changes in the PREFIX_DIR directory and use the configuration files from the PREFIX_DIR directory. This option does not chroot and is intended for preparing a cross−compilation target. Some limitations: NIS and LDAP users/groups are not verified. PAM authentication is using the host files. No SELINUX support.
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å¨ /etc/login.defs ä¸æå¦ä¸éç½®åéï¼å¯ä»¥ç¨æ¥æ´æ¹æ¤å·¥å·çè¡ä¸ºï¼
GID_MAX (number), GID_MIN (number)
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MAX_MEMBERS_PER_GROUP (number)
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é»è®¤å¼æ¯ 0ï¼æå³çç»ä¸çæåæ°æ²¡æéå¶ã
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SYS_GID_MAX (number), SYS_GID_MIN (number)
useraddãgroupadd æ newusers å建çç³»ç»ç»çç» ID çèå´ã
SYS_GID_MIN å SYS_GID_MAX çé»è®¤å¼åå«æ¯ 101 å GID_MIN−1ã
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/etc/group
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/etc/gshadow
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/etc/login.defs
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CAVEATS
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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.
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GID ä¸å¯ä¸ (没æä½¿ç¨ −o)
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æ æ³æ´æ°ç»æ件
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chfn(1), chsh(1), passwd(1), gpasswd(8), groupdel(8), groupmod(8), login.defs(5), useradd(8), userdel(8), usermod(8).