#
# Uses 'hostname --all-fqdns' to confirm that both: IP address[es] assigned, and DNS operational
#

[Unit]
Description=Wait for Network to be Online
Documentation=man:systemd.service(5) man:systemd.special(7)
Conflicts=shutdown.target
After=network.target
Before=network-online.target

[Service]
Type=oneshot
ExecStart=/bin/bash -c 'while [ -z $(hostname --all-fqdns) ]; do sleep 1; done'
TimeoutStartSec=1min 30s

[Install]
WantedBy=network-online.target

systemctl daemon-reload
systemctl enable network-wait-online