You will learn how to install and configure the ISC #DHCP server on Ubuntu LTS.
To start DHCP server, at least one subnet must be defined within the DHCP configuration file /etc/dhcp/dhcpd.conf.
Configuring DHCP Server in #CentOS and #Ubuntu.
https://linuxapt.com/blog/36-how-to-configure-dhcp-on-linux