How to modify the group to which a user belongs in Linux

Modify the group to which a user belongs in Linux

1. Set a user's group

usermod -g user group username

Note: -g|--gid, modify the user's gid, the group must exist

2. Add the user to a group(s)

usermod -a -G usergroup username

Note:

-a|--append, append the user to certain groups, only used with the -G option

-G|--groups, add the user to certain groups, only used with the -a option

Content Extension

User Management Commands

useradd Note: Add a user
adduser Note: Add a user
passwd Note: Set a password for the user
usermod Note: Modify user commands. You can use usermod to modify the login name, user's home directory, etc.
pwcov Note: Synchronize users from /etc/passwd to /etc/shadow
pwck Note: pwck is used to check whether the contents of the user configuration files /etc/passwd and /etc/shadow files are legal or complete;
pwunconv Note: It is the reverse operation of pwcov. It creates /etc/passwd from /etc/shadow and /etc/passwd, and then deletes the /etc/shadow file.
finger Note: View user information tool
id Note: View the user's UID, GID and the user group to which he belongs
chfn Note: Change User Information Tool
su Note: User switching tool
sudo Note: sudo is to execute a command as another user. su is used to switch users and then complete the corresponding task through the switched user. However, sudo can directly execute commands afterwards. For example, sudo does not require the root password to execute the commands granted by root. Only root can execute the corresponding commands. However, this can be achieved by editing /etc/sudoers through visudo.
visudo Note: visodo is the command to edit /etc/sudoers. You can also use vi to edit /etc/sudoers directly without using this command, and the effect is the same.
sudoedit Note: It has similar functions to sudo;

The above is all the content of this introduction. Thank you for your learning and support for 123WORDPRESS.COM.