Linux - Ubuntu Server Users and Groups
Create and manage local user and group accounts
- Each user account is stored on a line in
/etc/passwd with the following attributes: Username:Password:UID:GID:Comment:Home:Shell.
- Password typically includes a placeholder value of X that indicates that the user’s password is stored in
/etc/shadow.
/etc/shadow has permission settings of 400 as opposed to 644.
- Add a new user account using
sudo useradd -d /home/dicky -m dicky -s /bin/bash.
Note: The -m option creates a new home directory if it does not exist.
- Set the new user’s password with
sudo passwd dicky.
- The contents of the user’s new home directory is pulled from
/etc/skel.
- Delete a user with
sudo userdel -r dicky.
Note: The -r removes the home directory
Manage personal and system-wide environment profiles
