How do I use PuTTY to log in to a non-root user on Ubuntu 16.04?

when saving session in PuTTY, click data from the left panel and put the non-root username in auto-login username field and save.

@KivxD

Which tutorial did you follow?

I’ll use username as the username in this example.

1). Create the users home directory and the .ssh directory where we’ll store the users’ key.

mkdir -p /home/username/.ssh

2). Add the user and set their home directory to the one we just created.

useradd -d /home/username username

3). Add the user to the sudo group.

usermod -aG sudo username

4). Create our authorized_keys file.

touch /home/username/.ssh/authorized_keys

5). Setup proper permissions on the .ssh directory, authorized_keys file, and home directory.

chmod 700 /home/username/.ssh

chmod 644 /home/username/.ssh/authorized_keys

chown -R username:username /home/username

6). Now you need to paste in your public key to the authorized_keys file located here:

/home/username/.ssh/authorized_keys

At this point, you should be able to login via SSH if everything is configured correctly.