Centos下添加用户到用户组

忘是亡心i 2022-08-06 09:24 244阅读 0赞

将一个用户添加到用户组中，千万不能直接用：  
usermod -G groupA

这样做会使你离开其他用户组，仅仅做为 这个用户组 groupA 的成员。  
应该用 加上 -a 选项：  
usermod -a -G groupA user

(FC4: usermod -G groupA,groupB,groupC user)  
\-a 代表 append， 也就是 将自己添加到 用户组groupA 中，而不必离开 其他用户组。

命令的所有的选项，及其含义：  
Options:  
\-c, --comment COMMENT         new value of the GECOS field  
\-d, --home HOME\_DIR           new home directory for the user account  
\-e, --expiredate EXPIRE\_DATE set account expiration date to EXPIRE\_DATE  
\-f, --inactive INACTIVE       set password inactive after expiration  
to INACTIVE  
\-g, --gid GROUP               force use GROUP as new primary group  
\-G, --groups GROUPS           new list of supplementary GROUPS  
\-a, --append          append the user to the supplemental GROUPS  
mentioned by the -G option without removing  
him/her from other groups  
\-h, --help                    display this help message and exit  
\-l, --login NEW\_LOGIN         new value of the login name  
\-L, --lock                    lock the user account  
\-m, --move-home               move contents of the home directory to the new  
location (use only with -d)  
\-o, --non-unique              allow using duplicate (non-unique) UID  
\-p, --password PASSWORD       use encrypted password for the new password  
\-s, --shell SHELL             new login shell for the user account  
\-u, --uid UID                 new UID for the user account  
\-U, --unlock                  unlock the user account

查看用户所属的组使用命令：$ groups user

或者查看文件：$ cat /etc/group