Adding Users in Ubuntu

1. adduser
sudo adduser john
Prompts for each piece of information(password, home dir etc)

To create/assign admin/sudoer:
sudo adduser john admin
If john already exists, it assigns admin/sudoer privilege to john. This works because /etc/sudoers is pre-configured to grant permissions to all members of this group.

2. useradd
sudo useradd john
Adds user without any extra options. User won’t have a password or a home directory.
To create user with home dir:
sudo useradd -d /home/john -m john
To change password:
sudo passwd john

Check man pages of adduser and useradd for additional options.

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