系统-网络.套接字失败。对该怎么办有什么想法吗？
我的服务器上的Internet连接有问题。我不能使用Filezilla或Webmin，因为我的systemd-networkd.套接字似乎是错误的或者什么的。你能帮帮我吗?这是我的输出：
$ systemctl system d-networkd.套接字加载失败$ systemctl状态系统d-networkd.套接字加载:加载(/lib/systemd/system/systemd-networkd.套接字；已启用；供应商预置:已启用) Active: failed (结果:service-start-limt-命中)
同时，我也收到了这样的信息：
1月20日16:34:21示例服务器系统d:systemd-networkd.套接字:套接字服务系统d-networkd.service已经激活，拒绝。网络服务网络链接套接字未能侦听
回答 2
Ask Ubuntu用户
发布于 2020-12-21 13:18:14
在ubuntu20.04上，您可以打开应用程序系统-管理器。然后单击顶部栏中的“服务”按钮，就会打开一个下拉菜单.您需要选择“套接字”选项。左面板将显示套接字服务列表，在那里您可以找到服务名称为'systemd-networkd‘。对这项服务，必须有两个绿色的滴答标记。如果没有，则选择该服务并单击顶部栏中的“启用”按钮，然后单击“开始”按钮(绿色按钮)启动服务。这将使两个绿色滴答与该服务在左面板。
Ask Ubuntu用户
发布于 2021-10-29 19:33:53
当我输入命令sudo systemctl status systemd-networkd.socket时，我有一个错误：
systemd-networkd.socket: Socket service systemd-networkd.service already active, refusing.
systemd[1]: Failed to listen on Network Service Netlink Socket.
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.我们需要找到解决办法，以避免使用ioctl, ifconfig, route，而是选择netlink/rtnetlink在用户空间和Linux内核之间进行通信。Netlink允许您测试大量内核子系统--接口、路由、网络数据包筛选器。
- 如果您处于死胡同，并且不知道有哪些错误，那么首先修复您需要了解的问题:您使用的是
network-manager还是systemd-networkd？ - Rtnetlink在使用根目录时遇到了一些困难，因此，它目前是如何使用的。它更容易使用在附近的汽车，这样你就不会再次绊倒它，你没有问题。
- 在Linux2.2中，一个接口可以有多个IP地址；它们是可选的设备别名。
- Rtnetlink除了标准netlink消息
RTM_(返回NETLINK_)之外，还包含消息类型。
For使用rtnetlink安装：
sudo apt install socket
将套接字与rtnetlink一起使用，命令for示例：
sudo socket -p RTM_GETTCLASS -p network-manager -s | host localhost
产出：
localhost has address 127.0.0.1
localhost has IPv6 address ::1sudo socket -p RTM_GETTCLASS -p network-manager -s | host -aCdilrTvVw | /
产出：
host 9.11.3-1ubuntu1.15-Ubuntu手册：
https://man7.org/linux/man-pages/man7/rtnetlink.7.html
https://man7.org/linux/man-pages/man7/netlink.7.html
rtnetlink, NETLINK_ROUTE - Linux IPv4 routing socket.
RTM_NEWLINK, RTM_DELLINK, RTM_GETLINK - create, delete or get information about specific network interface.
RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR - add, remove or get address information, the IP associated with the interface.
RTM_NEWROUTE, RTM_DELROUTE, RTM_GETROUTE - create, delete, or get information about a network route.
RTM_NEWNEIGH, RTM_DELNEIGH, RTM_GETNEIGH - add, remove or get information about a record, made by a neighboring machine (for example, an ARP entry).
RTM_NEWRULE, RTM_DELRULE, RTM_GETRULE - add, remove or get a rule routing.
RTM_NEWQDISC, RTM_DELQDISC, RTM_GETQDISC - add, remove or get a shipping method package to the queue.
RTM_NEWTCLASS, RTM_DELTCLASS, RTM_GETTCLASS - add, remove or get traffic class.
RTM_NEWTFILTER, RTM_DELTFILTER, RTM_GETTFILTER - add, remove or get information about a filter traffic.
RTMGRP_LINK - this group receives notifications about changes in network interfaces (interface was removed, added, down, up)
RTMGRP_IPV4_IFADDR - this group receives notifications about changes in IPv4 interface addresses (the address has been added or removed)
RTMGRP_IPV6_IFADDR - this group receives notifications about changes in IPv6 interface addresses (the address has been added or removed)
RTMGRP_IPV4_ROUTE - this group receives notification of changes in the routing table for IPv4 addresses
RTMGRP_IPV6_ROUTE - this group receives notification of changes in the routing table for IPv6 addresses
NETLINK_ROUTE - receive notifications about changes to the routing table and network interfaces, can also be used to change all the parameters of the above objects.
NETLINK_USERSOCK - reserved for defining custom protocols.
NETLINK_FIREWALL - used to transfer IPv4 packets from the network filter to the user level
NETLINK_INET_DIAG - monitoring inet sockets
NETLINK_NFLOG - network/packet filter ULOG
NETLINK_SELINUX - receive notifications from the Selinux system
NETLINK_NETFILTER - working with the network filter subsystem
NETLINK_KOBJECT_UEVENT - receive kernel messageshttps://askubuntu.com/questions/1111422
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