Adding Server Users (reminder for myself)

addingusers.sh

# Step 1
# Add the user with
sudo adduser username
# Ensure a temporary password is given to the account else it remains locked
# other options can be left blank

# Add the username to the AllowedUsers field in /etc/ssh/sshd_config (on the server)

# Next step is often easier to do as the new user to avoid messing up file ownership
sudo -i -u newuser

# Copy the users RSA public key in to the authorized_users file in their home directory.
mkdir /home/newuser/.ssh
chmod -R newuser:newuser 700 /home/newuser/.ssh   # if files are created as the new user, the group ownerships (user:user) can be omitted
touch /home/newsuer/.ssh/authorized_keys
chmod -R newuser:newuser 600 /home/newuser/.ssh/authorized_keys

# Copy and paste the public key in to the empty authorised keys.

# Restard the SSH daemon to confirm the changes:
sudo service ssh restart