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[Unit]
Description=Network Manager Wait Online
Documentation=man:nm-online(1)
Requisite=NetworkManager.service
After=NetworkManager.service
Before=network-online.target

[Service]
Type=oneshot
ExecStart=/usr/bin/nm-online -s -q --timeout=30
RemainAfterExit=yes

[Install]
WantedBy=network-online.target