Debian 8: if a unit requires another unit to run?

Question

linux

Hello!
Available: Debian 8, tftpd-hpa, isc-dhcp-server, networkmanager.
Problem: For some reason, NetworkManager is loaded after tftpd-hpa and isc-dhcp-server, respectively, the network is not yet available, and these units are already starting. I tried to write in /etc/init.d/tftpd-hpa: Required-Start=NetworkManager.service but it did not help. Tell me how to make tftpd-hpa and isc-dhcp-server start when the network is already initialized?

Answer 1

8ka we already have on systemd?
Then stop writing something in /etc/init.d/* and go read https://fedoramagazine.org/systemd-unit-dependenci... about systemd unit dependencies.