我创建了一个脚本，在系统启动时将网卡设置为1G。我为此创建了一项新服务，但它不起作用。
我执行启动并收到此错误，并且网络速度没有改变。
$ systemctl start service activar_a_1G_enp3s0.service
Failed to start service.service: Unit service.service not found.
$
这是我的 .service 文件（我已经用 3 之后我听到了）
cat activar_a_1G_enp3s0.service
[Unit]
Description=Activa1GRed
#After=multi-user.target
#After=network.target
After=NetworkManager.service
[Service]
Type=oneshot
ExecStart=/usr/local/bin/activar_a_1G_enp3s0.sh
[Install]
WantedBy=default.target
sh 文件是（如果我手动执行它工作正常）
$ ls -la /usr/local/bin/activar_a_1G_enp3s0.sh
-rwxr-xr-x. 1 root root 433 nov 22 22:43 /usr/local/bin/activar_a_1G_enp3s0.sh
$ cat /usr/local/bin/activar_a_1G_enp3s0.sh
#!/bin/bash
# Cambiamos la velocidad de la tarjeta a 1Gb
/usr/sbin/ethtool -s enp3s0 autoneg on
编辑：
和systemctl启动activar_a_1G_enp3s0.service服务手动工作正常，但当我重新启动机器时，它不起作用，并且出现此错误
$ systemctl status activar_a_1G_enp3s0.service
● activar_a_1G_enp3s0.service - Activa1GRed
Loaded: loaded (/etc/systemd/system/activar_a_1G_enp3s0.service; enabled; vendor preset: disabled)
Active: inactive (dead) since Mon 2020-11-23 02:34:11 CET; 3min 4s ago
Process: 1185 ExecStart=/usr/local/bin/activar_a_1G_enp3s0.sh (code=exited, status=0/SUCCESS)
Main PID: 1185 (code=exited, status=0/SUCCESS)
CPU: 11ms
nov 23 02:34:05 aqua systemd[1]: Starting Activa1GRed...
nov 23 02:34:06 aqua activar_a_1G_enp3s0.sh[1189]: netlink error: failed to retrieve link settings
nov 23 02:34:06 aqua activar_a_1G_enp3s0.sh[1189]: netlink error: No such device
nov 23 02:34:11 aqua systemd[1]: activar_a_1G_enp3s0.service: Succeeded.
nov 23 02:34:11 aqua systemd[1]: Finished Activa1GRed.
如何将我的服务的执行延迟到网络恢复正常为止？
编辑2：
我已按照您的指示进行操作，启动已停止 2 分钟等待网络。之后系统已启动，但 1G 配置不起作用。速度为100Mb/s开机后。
Settings for enp3s0:
...
Speed: 100Mb/s
Duplex: Half
...
Link detected: yes
enp3s0: 100 Mbit, half duplex, link ok
启动后我手动运行服务的启动
$ systemctl start activar_a_1G_enp3s0.service
$ systemctl status activar_a_1G_enp3s0.service
● activar_a_1G_enp3s0.service - Activa1GRed
Loaded: loaded (/etc/systemd/system/activar_a_1G_enp3s0.service; enabled; vendor preset: disabled)
Active: inactive (dead) since Mon 2020-11-23 23:06:53 CET; 3s ago
Process: 5891 ExecStart=/usr/local/bin/activar_a_1G_enp3s0.sh (code=exited, status=0/SUCCESS)
nov 23 23:06:48 aqua systemd[1]: Starting Activa1GRed...
nov 23 23:06:53 aqua systemd[1]: activar_a_1G_enp3s0.service: Succeeded.
nov 23 23:06:53 aqua systemd[1]: Finished Activa1GRed.
现在我有了正确的速度（1000Mb/秒）
Settings for enp3s0:
...
Speed: 1000Mb/s
Duplex: Full
...
Link detected: yes
enp3s0: negotiated 1000baseT-FD flow-control, link ok
Main PID: 5891 (code=exited, status=0/SUCCESS)
CPU: 11ms
这是 enp3s0 的 dmesg 命令的输出
$ dmesg|grep enp3s0
[ 2.168785] r8169 0000:03:00.0 enp3s0: renamed from eth0
[ 4.401733] systemd[1]: Configuration file /etc/systemd/system/activar_a_1G_enp3s0.service is marked world-inaccessible. This has no effect as configuration data is accessible via APIs without restrictions. Proceeding anyway.
[ 9.127366] r8169 0000:03:00.0 enp3s0: Link is Down
[ 11.801640] r8169 0000:03:00.0 enp3s0: Link is Up - 1Gbps/Full - flow control off
[ 11.801647] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
[ 129.159287] r8169 0000:03:00.0 enp3s0: Link is Down
[ 131.368490] r8169 0000:03:00.0 enp3s0: Link is Up - 100Mbps/Half - flow control off
[ 414.549164] r8169 0000:03:00.0 enp3s0: Link is Down
[ 417.332359] r8169 0000:03:00.0 enp3s0: Link is Up - 1Gbps/Full - flow control off
谢谢
答案1
systemctl start service activar_a_1G_enp3s0.service
^^^^^^^
这就是你的问题——解决掉它service。
Edit1：尝试帮助满足更改后的需求。
请尝试以下操作：
systemctl enable systemd-networkd.service systemd-networkd-wait-online.service
并在您的单元文件中添加：
After=systemd-networkd-wait-online.service
Wants=systemd-networkd-wait-online.service
当然，我不能保证这有效 - systemd 下的事件顺序可能有点变化无常。