(yum = apt on debian/ubuntu, etc)
sudo yum install -y cockpit cockpit-docker cockpit-machines
sudo yum install -y htop
sudo yum install -y tree #-L 2
https://linuxize.com/post/create-a-linux-swap-file/
sudo fallocate -l 1G /swapfile
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
modify /etc/fstab with /swapfile swap swap defaults 0 0
verify with sudo swapon --show
https://www.digitalocean.com/community/tutorials/ufw-essentials-common-firewall-rules-and-commands
sudo ufw allow ssh <MYIP>
sudo ufw allow 9090 <MYIP>
sudo ufw allow http https
ufw enable
http://nginx.org/en/docs/beginners_guide.html#proxy
docker update --restart=unless_stopped container_name
docker top container_name
# sudo yum-config-manager --enable epel
sudo yum update
sudo yum install inotify-tools
(persist: update /etc/yum.repos.d/epel.repo - epel section, change enabled=0 to =1)