## Install sshd
In order to enable ssh on Ubuntu Linux, we first need to perform an SSH package installation. Open up terminal and enter command: 

    $ sudo apt install sshd
    


## Create a user using command line
Let's start by creating a new user. Open up terminal and enter:

    $ sudo adduser --no-create-home username
    


## Create non-login/system user
Let's start by creating a new user. Open up terminal and enter:

    $ sudo useradd -r username
    
    
## Change default shell
    $ grep user /etc/passwd

    $ usermod --shell /bin/bash user

    $ grep user /etc/passwd
    
## Adding User to the sudo Group
    $ usermod -aG sudo username