Question

Setting up a new user using SSH

Posted July 8, 2020 206 views
Ubuntu 20.04

I followed the tutorial for setting up myself with SSH login which worked fine. I have another user I need to add as well but I am not sure how to go about doing that. I have his public key and added it to the droplet on creation. Droplet is running ubuntu 18.04. Any help would be greatly appreciated. I’ve looked through several other tutorials and documentation for this as well but I just can’t seem to find exactly what I am looking for. I don’t think I can set him up the same way I set it up for myself.

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2 answers

Hi @rconover,

You’ll need to create a new user and add the SSH keys there. I normally set and create their home directory at the same time.

i.e.

Create Home Directory + .ssh Directory

mkdir -p /home/mynewuser/.ssh

Create Authorized Keys File

touch /home/mynewuser/.ssh/authorized_keys

Create User + Set Home Directory

useradd -d /home/mynewuser mynewuser

Add User to sudo Group

usermod -aG sudo mynewuser

Set Permissions

chown -R mynewuser:mynewuser /home/mynewuser/
chown root:root /home/mynewuser
chmod 700 /home/mynewuser/.ssh
chmod 644 /home/mynewuser/.ssh/authorized_keys

Set Password on User

If you want to be able to log in as the user without an SSH key, setting a password will allow that, as long as PasswordAuthentication is enabled in /etc/ssh/sshd_config.

passwd mynewuser

You can check the users home directory by running:

echo $HOME

… while logged in as the user. If you echo $PWD, it’ll give you the current path to the directory that you’re currently in. So if I ran cd /home, running:

echo $PWD

… will give me /home. If my home directory is /home/mynewuser, then $HOME will give me that directory :-).

Regards,
KFSys

Hi, @rconover

You can check out our existing tutorial on how to add users on Ubuntu 18.04 here:

https://www.digitalocean.com/community/tutorials/how-to-add-and-delete-users-on-ubuntu-18-04

Additionally you can check that the user’s ssh key is present in the ~/.ssh/authorized_keys file and if not to add it there.

If the user needs a sudo access you can grant him access by following the tutorial.

Hope that helps!

Regards,
Alex

by Jamon Camisso
Learning how to manage users effectively is an essential skill for any Linux system administrator. In this guide, we will discuss how to add and delete users and assign sudo privileges on an Ubuntu 18.04 server.
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