start by updating the release
sudo apt-get update && sudo apt-get dist-upgrade
mysql -version
or
sudo apt install -y build-essential libssl-dev zlib1g-dev
wget "https://fastly.cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-7.4p1.tar.gz"
tar xfz openssh-7.4p1.tar.gz
cd openssh-7.4p1
./configure
make
sudo make install && sudo service ssh restart && ssh -V