ssh in to the box … 

ssh root@192.0.0.1

system updates …

Debian based systems 

apt update && apt upgrade

Fedora 

sudo dnf upgrade

you are probably going to want a decent editor 

## fedora ##
dnf install -y neovim
# or
dnf install -y helix

## debian based ##
sudo apt install -y neovim
# or
add-apt-repository ppa:maveonair/helix-editor
apt update
apt install -y helix

set hosts

edit /etc/hostname or 

hostnamectl set-hostname my-host-name

edit /etc/hosts with public IP and FQDN (fully qualified domain name)