我已经在技嘉 brix pro 上安装了 Debian 8，除了网络之外，一切似乎都运行正常。
我已启用systemd-networkd.service、禁用networking.service并network在中创建了适当的文件/etc/systemd/network。我还配置并启用了wpasupplicant无线适配器。
系统启动时，它会找到wlan0.network文件，打开界面，检测链接并正常运行，但由于某种原因，它看不到（或没有记录它看到）eth0.network我创建的文件。它没有检测到链接，也没有打开eth0。
系统完全启动后，我可以运行systemctl restart systemd-networkd.service或ifup eth0，它会调出界面并正确配置它，此时它就可以正常工作了。它只是不会在启动时调出它。
/etc/systemd/network/wlan0.network
[Match]
Name=wlan0
[Network]
Address=192.168.1.21/24
DNS=192.168.1.1
/etc/systemd/network/eth0.network
[Match]
Name=eth0
[Network]
Address=192.168.1.10/24
Gateway=192.168.1.1
DNS=192.168.1.1
网际协议连接
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether fc:aa:14:db:cf:40 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
link/ether dc:85:de:ee:96:af brd ff:ff:ff:ff:ff:ff
lspci-v
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
Subsystem: Gigabyte Technology Co., Ltd Motherboard
Flags: bus master, fast devsel, latency 0, IRQ 43
I/O ports at d000 [size=256]
Memory at f7c00000 (64-bit, non-prefetchable) [size=4K]
Memory at f0000000 (64-bit, prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 01
Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
Capabilities: [d0] Vital Product Data
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
Capabilities: [170] Latency Tolerance Reporting
Kernel driver in use: r8168
日志控制
kernel: r8168 Gigabit Ethernet driver 8.040.00-NAPI loaded
kernel: r8168 0000:03:00.0: irq 43 for MSI/MSI-X
...
kernel: r8168: This product is covered by one or more of the following patents: US6,570,884, US6,115,776, and US6,327,625.
kernel: r8168 Copyright (C) 2015 Realtek NIC software team <[email protected]>
This program comes with ABSOLUTELY NO WARRANTY; for details, please see <http://www.gnu.org/licenses/>.
This is free software, and you are welcome to redistribute it under certain conditions; see <http://www.gnu.org/licenses/>.
...
systemd-networkd[456]: wlan0 : link 3 added
systemd-networkd[456]: wlan0 : udev initialized link
systemd-networkd[456]: wlan0 : flags change: +UP +RUNNING +MULTICAST +BROADCAST
systemd-networkd[456]: wlan0 : flags change: -RUNNING
systemd-networkd[456]: Sent message type=method_call sender=n/a destination=org.freedesktop.DBus object=/org/freedesktop/DBus interface=org.freedesktop.DBus member=H
systemd-networkd[456]: sd-rtnl: discarding 20 bytes of incoming message
systemd-networkd[456]: wlan0 : link state is up-to-date
systemd-networkd[456]: wlan0 : found matching network '/etc/systemd/network/wlan0.network'
systemd-networkd[456]: wlan0 : enslaved
systemd-networkd[456]: wlan0 : setting addresses
systemd-networkd[456]: Got message type=method_return sender=org.freedesktop.DBus destination=:1.2 object=n/a interface=n/a member=n/a cookie=1 reply_cookie=1 error=
systemd-networkd[456]: Got message type=signal sender=org.freedesktop.DBus destination=:1.2 object=/org/freedesktop/DBus interface=org.freedesktop.DBus member=NameAc
systemd-networkd[456]: sd-rtnl: discarding 20 bytes of incoming message
systemd-networkd[456]: rtnl: received address for a nonexistent link, ignoring
systemd-networkd[456]: rtnl: received address for a nonexistent link, ignoring
systemd-networkd[456]: wlan0 : added address: 192.168.1.21/24
systemd-networkd[456]: wlan0 : addresses set
systemd-networkd[456]: wlan0 : link configured
systemctl status systemd-networkd.service （从启动开始）
systemd-networkd[456]: sd-rtnl: discarding 20 bytes of incoming message
systemd-networkd[456]: rtnl: received address for a nonexistent link, ignoring
systemd-networkd[456]: rtnl: received address for a nonexistent link, ignoring
systemd-networkd[456]: wlan0 : added address: 192.168.1.21/24
systemd-networkd[456]: wlan0 : addresses set
systemd-networkd[456]: wlan0 : link configured
systemd-networkd[456]: wlan0 : flags change: +LOWER_UP
systemd-networkd[456]: wlan0 : flags change: +RUNNING
systemd-networkd[456]: wlan0 : gained carrier
systemd-networkd[456]: wlan0 : added address: fe80::de85:deff:feee:96af/64
systemctl status systemd-networkd.service（重启 networkd 后）
systemd-networkd[877]: wlan0 : link configured
systemd-networkd[877]: eth0 : flags change: +UP
systemd-networkd[877]: eth0 : added address: 192.168.1.10/24
systemd-networkd[877]: eth0 : addresses set
systemd-networkd[877]: eth0 : setting routes
systemd-networkd[877]: eth0 : routes set
systemd-networkd[877]: eth0 : link configured
systemd-networkd[877]: eth0 : flags change: +LOWER_UP +RUNNING
systemd-networkd[877]: eth0 : gained carrier
systemd-networkd[877]: eth0 : added address: fe80::feaa:14ff:fedb:cf40/64
我还应该提供哪些信息来帮助找到解决方案？
更新
添加以下行/etc/network/interfaces并启用可修复networking.service此问题，并且所有内容都会在启动时出现，但我不想使用旧的 init.d 系统。我想使用新的 systemd-networkd，我想知道为什么在那个环境中会发生这种情况。
auto eth0
iface eth0 inet static
address 192.168.1.10
netmask 255.255.255.0
gateway 192.168.1.1
编辑
wpa_supplicant.service丢失了，因为我已禁用它；networking.service启用了，因为它是目前唯一能正常工作的东西。
systemctl -t 服务
UNIT LOAD ACTIVE SUB DESCRIPTION
acpid.service loaded active running ACPI event daemon
atd.service loaded active running Deferred execution scheduler
console-setup.service loaded active exited LSB: Set console font and keymap
cron.service loaded active running Regular background program processing daemon
dbus.service loaded active running D-Bus System Message Bus
exim4.service loaded active running LSB: exim Mail Transport Agent
[email protected] loaded active running Getty on tty1
kbd.service loaded active exited LSB: Prepare console
keyboard-setup.service loaded active exited LSB: Set preliminary keymap
kmod-static-nodes.service loaded active exited Create list of required static device nodes for the current kernel
lm-sensors.service loaded active exited Initialize hardware monitoring sensors
networking.service loaded active exited LSB: Raise network interfaces.
nfs-common.service loaded active exited LSB: NFS support files common to client and server
rc-local.service loaded active exited /etc/rc.local Compatibility
rpcbind.service loaded active running LSB: RPC portmapper replacement
rsyslog.service loaded active running System Logging Service
ssh.service loaded active running OpenBSD Secure Shell server
systemd-backlight@backlight:acpi_video0.service loaded active exited Load/Save Screen Backlight Brightness of backlight:acpi_video0
systemd-journald.service loaded active running Journal Service
systemd-logind.service loaded active running Login Service
systemd-modules-load.service loaded active exited Load Kernel Modules
systemd-networkd.service loaded active running Network Service
systemd-random-seed.service loaded active exited Load/Save Random Seed
systemd-remount-fs.service loaded active exited Remount Root and Kernel File Systems
systemd-resolved.service loaded active running Network Name Resolution
[email protected] loaded active exited Load/Save RF Kill Switch Status of rfkill0
systemd-setup-dgram-qlen.service loaded active exited Increase datagram queue length
systemd-sysctl.service loaded active exited Apply Kernel Variables
systemd-tmpfiles-setup-dev.service loaded active exited Create Static Device Nodes in /dev
systemd-tmpfiles-setup.service loaded active exited Create Volatile Files and Directories
systemd-udev-trigger.service loaded active exited udev Coldplug all Devices
systemd-udevd.service loaded active running udev Kernel Device Manager
systemd-update-utmp.service loaded active exited Update UTMP about System Boot/Shutdown
systemd-user-sessions.service loaded active exited Permit User Sessions
udev-finish.service loaded active exited Copy rules generated while the root was ro
答案1
添加节来解决您的问题的原因/etc/networking/interfaces是您已启用networking.service。如果您查看该networking.service文件，您将看到（部分编辑）：
[Unit]
SourcePath=/etc/init.d/networking
Description=LSB: Raise network interfaces.
.....
[Service]
.....
ExecStart=/etc/init.d/networking start
ExecStop=/etc/init.d/networking stop
ExecReload=/etc/init.d/networking reload
这清楚地表明这是提供与旧 SysV 脚本兼容性的服务，而您希望避免这种情况。
虽然没有在任何地方明确说明这一点（我找不到！），但我猜测这与 相冲突systemd-networkd.service，尽管与 SysV 不兼容，但它可以提供完全相同的服务。
所以我的猜测是禁用networking，然后重新启动以检查这是（唯一的）解决方案。
答案2
这里有类似的症状。
日志br0: DHCPv6 lease lost让我产生了怀疑：
root@lorank8:/home/bue# systemctl status systemd-networkd
● systemd-networkd.service - Network Service
Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2019-03-08 09:02:14 UTC; 2min 42s ago
Docs: man:systemd-networkd.service(8)
Main PID: 906 (systemd-network)
Status: "Processing requests..."
Tasks: 1 (limit: 4915)
CGroup: /system.slice/systemd-networkd.service
└─906 /lib/systemd/systemd-networkd
Mar 08 09:02:22 lorank8 systemd-networkd[906]: br0: Lost carrier
Mar 08 09:02:22 lorank8 systemd-networkd[906]: br0: DHCPv6 lease lost
Mar 08 09:02:27 lorank8 systemd-networkd[906]: eth0: Gained IPv6LL
Mar 08 09:02:30 lorank8 systemd-networkd[906]: usb0: Gained carrier
Mar 08 09:02:30 lorank8 systemd-networkd[906]: usb1: Gained carrier
Mar 08 09:02:31 lorank8 systemd-networkd[906]: usb0: Gained IPv6LL
Mar 08 09:02:31 lorank8 systemd-networkd[906]: usb1: Gained IPv6LL
connman.service 干扰了 systemd-networkd
禁用 connman 后，bridge 和 eth0 按预期在启动时出现。