Managing Users and Groups

Managing Users and Groups on Linux

Proper user management is essential for server security. Avoid running everything as root.

Create a New User

adduser username

Grant Sudo (Admin) Privileges

usermod -aG sudo username    # Ubuntu/Debian
usermod -aG wheel username   # CentOS/RHEL

Switch to a User

su - username

Delete a User (and Their Home Directory)

deluser --remove-home username    # Debian/Ubuntu
userdel -r username               # CentOS/RHEL

List All Users

cat /etc/passwd

Create and Manage Groups

groupadd mygroup
usermod -aG mygroup username
groups username
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