linux group & user

group & user

Users & Groups
Group file: /etc/group
Add User:
adduser USER
New Group:
groupadd GROUP
newgrp GROUP
Account numbering and important settings: /etc/login.defs
Own a user a folder:
chown -R USER FOLDER
Remove a user from a group:
deluser USER GROUP
Remove a user:
userdel -r USER
userdel USER → If you want to keep files and folders
Remove a group:
groupdel GROUP
Change a user’s group
sudo usermod -G GROUP -a 'USER'
Lock a user:
usermod -L USER
Or
Edit /etc/shadow and substitute the password with *
User information:
chage -l USER