wpa_supplicant
/etc/systemd/system/wpa_supplicant.service
[Unit]
Description=WPA supplicant daemon (interface-specific version)
Requires=sys-subsystem-net-devices-wlp3s0.device
After=sys-subsystem-net-devices-wlp3s0.device
Before=network.target
Wants=network.target
# NetworkManager users will probably want the dbus version instead.
[Service]
Type=simple
ExecStart=/usr/bin/wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf -i wlp3s0
[Install]
WantedBy=multi-user.target