ssh -C2qTnN -D 12345 -p 22 <system_user>@<domain>
ssh -A <system_user>@<domain>
ssh -o PreferredAuthentications=password -o PubkeyAuthentication=no <domain>
chmod 700 ~/.ssh chmod 600 ~/.ssh/id_rsa chmod 600 ~/.ssh/id_rsa.pub
mkdir ~/.ssh touch ~/.ssh/authorized_keys chmod 600 ~/.ssh/authorized_keys vim ~/.ssh/authorized_keys