sshd (ssh server) on Ubuntu 15.04 or later (systemctl)

sshd-setup-suggestions-UbuntuDesktop.bash

sudo apt-get update && sudo apt-get install -y openssh-server

## ---
# Change daemon settings such as default port, X11 forwarding (ensure is on), and root login:
#  |  OPTION             | default           |  recommended
# -------------------------------------------------------------
#     Port                       22           Something > 2000
#     PermitRootLogin      without-password          no
#     X11Forwarding             yes                 yes
sudo vim /etc/ssh/sshd.config
# -----

sudo systemctl restart ssh