sudo apt-get update

sudo apt-get upgrade

reboot

ssh -vvv myserver@<ip>
OpenSSH_7.2p2 Ubuntu-4ubuntu2.6, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "<ip>" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to <ip> [<ip>] port 22.
debug1: connect to address <ip> port 22: Connection refused
ssh: connect to host <ip> port 22: Connection refused