BC Wiki - systemd-networkd

Category: software

DHCP

sudo nano /etc/systemd/network/wired.network

[Match]
Name=enp*

[Network]
DHCP=ipv4

sudo systemctl start systemd-networkd

sudo systemctl enable systemd-networkd

sudo systemctl status systemd-networkd

Current DHCP leases are stored in /run/systemd/netif/leases/*

systemd-resolved

A DNS resolution service. I don’t think you need this in most situations.

wpa_supplicant

You need this if you need to do some sort of authentication on your network.

sudo nano /lib/systemd/system/wpa_supplicant-wired@.service

[Unit]
Description=WPA supplicant daemon (interface- and wired driver-specific version)
Requires=sys-subsystem-net-devices-%i.device
After=sys-subsystem-net-devices-%i.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-wired-%I.conf -Dwired -i%I

[Install]
Alias=multi-user.target.wants/wpa_supplicant-wired@%i.service

sudo systemctl start wpa_supplicant-wired-enp1s0.service

sudo systemctl enable wpa_supplicant-wired-enp1s0.service

sudo nano /lib/systemd/system/wpa_supplicant@.service

[Unit]
Description=WPA supplicant daemon (interface-specific version)
BindsTo=sys-subsystem-net-devices-%i.device
After=sys-subsystem-net-devices-%i.device
Wants=network.target
Before=network.target

[Service]
Type=oneshot
RemainAfterExit=yes
#ExecStart=/sbin/ip 1 set %i up
ExecStart=/sbin/wpa_supplicant -B -i %i -c /etc/wpa_supplicant/wpa_supplicant-%i.conf
#ExecStart=/sbin/dhclient %i

[Install]
Alias=multi-user.target.wants/wpa_supplicant@%i.service
#WantedBy=multi-user.target

sudo nano /lib/systemd/system/wpa_supplicant-wext@.service

[Unit]
Description=WPA supplicant daemon (interface-specific version)
BindsTo=sys-subsystem-net-devices-%i.device
After=sys-subsystem-net-devices-%i.device
Wants=network.target
Before=network.target

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/sbin/ip l set %i up
ExecStart=/sbin/wpa_supplicant -i %i -D wext -c /etc/wpa_supplicant/wpa_supplicant-%i.conf
#ExecStart=/sbin/dhclient %i
ExecStop=/sbin/ip l set %i down

[Install]
Alias=multi-user.target.wants/wpa_supplicant@%i.service
#WantedBy=multi-user.target

sudo nano /etc/wpa_supplicant/wpa_supplicant-wlp3s3.conf

ctrl_interface=/run/wpa_supplicant

network={
  ssid="openwireless.org"
  key_mgmt=NONE
}

sudo systemctl start wpa_supplicant-wlp3s3.service

sudo systemctl enable wpa_supplicant-wlp3s3.service

dhclient

A DHCP client. You don’t need this if you’re using systemd-networkd.

dhcpcd

dhcpcd is a network service used as the default in Raspbian builds (as of 2017-06). A GUI is provided by dhcpcd-ui. It looks nice but does NOT have support for wpa2-enterprise networks, which sucks.

References