Copying SSH Key From Root To Another User On Same Machine

https://askubuntu.com/questions/1218023/copying-ssh-key-from-root-to-another-user-on-same-machine

    Create the folder if it doesn't already exist:

    mkdir /home/$USER/.ssh

    Make the directory only executable by the user:

    chmod 700 /home/$USER/.ssh

    Copy the authorized_keys file that contains your public key:

    sudo cp /root/.ssh/authorized_keys /home/$USER/.ssh/authorized_keys

    Make everything in .ssh owned by your user:

    sudo chown -R $USER:$USER /home/$USER/.ssh

    Make it readable only by your user:

    sudo chmod 600 /home/$USER/.ssh/authorized_keys