Create and update a user and information.

# To create a new user with a default home directory and prompts the user to set a password:
adduser name

# To create a new user without a home directory:
adduser --no-create-home name

# To create a new user with a home directory at the specified path:
adduser --home path/to/home name

# To create a new user with the specified shell set as the login shell:
adduser --shell path/to/shell name

# To create a new user belonging to the specified group:
adduser --ingroup group name