Allows linux users to belong to multiple groups

Article Title: Let linux users belong to multiple groups. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

Usermod-g group name Username: Change the user's group to overwrite;

Usermod-G group name 1 [, group name 2,…] User name: add the user group;

Similar to Windows, a Linux system group can contain multiple user Members. In turn, a user can belong to multiple groups. One of the methods is to use the usermod-G command. Be especially careful when using-g, because it is covered. For example, if test was originally affiliated to the grp1 and grp2 groups, you suddenly came to a usermod-g grp3 test, the result is that the test user only belongs to the grp3 group;