(IPMI) https://en.wikipedia.org/wiki/Intelligent_Platform_Management_Interface

IPMI is a series of specifications that provide standardized interfaces to the so-called “platform management” services. (src)

((BMC) Baseboard Management Controller) https://de.wikipedia.org/wiki/Baseboard_Management_Controller

allows you to see the screen of your server via a simple java enhanced webbrowser – even under linux.

what it does it downloads a small java programm jviewer.jnlp to be run and shows you the REAL monitor output of your server even the bios.

so you can fully powercycle – poweroff – poweron your server and even insert image.iso to reinstall from scratch remotely.

# tested with hardware Intel mainboard S2600CWR
# you will have to enable bmc/ipmi in bios and assign ip
# tested with CentOS7 + browser Firefox 60.3.0esr (64-bit)

# rpm based fedora/redhat/centos
yum search icedtea
yum install icedtea-web.x86_64

# apt based debian/ubuntu
apt update
apt search icedtea
apt-get install icedtea-netx