ens33主网卡无IPv4地址仅配置了IPv6fe80::5552:1cdf:f164:8152导致无法通过IPv4通信。解决# 临时添加IPv4地址需sudo权限sudo ifconfig eth0 172.18.1.100 netmask 255.255.255.0 up# 设置默认网关替换为实际网关IP sudo route add default gw 192.168.1.1sudo ip route add default via 192.168.1.1 dev eth0echo nameserver 8.8.8.8 | sudo tee /etc/resolv.conf取消临时配置sudo dhclient -r ens33 sudo dhclient ens33永久生效编辑网络配置文件根据系统选择sudo nano /etc/netplan/01-netcfg.yaml# CentOS/RHEL sudo nano /etc/sysconfig/network-scripts/ifcfg-ens33添加# Ubuntu示例network: version: 2 renderer: networkd ethernets: ens33: dhcp4: yes # 或手动配置 addresses: [192.168.1.100/24] gateway4: 192.168.1.1 nameservers: addresses: [8.8.8.8, 1.1.1.1]如果电脑同时连接wifi和有线网络在192.168.211.157上连接192.168.1.5的板子首先断开wifi连接然后配置sudo ifconfig eno1 192.168.1.100 netmask 255.255.255.0sudo route add default gw 192.168.1.1 eno1##################ifconfig eth0 192.168.213.100 netmask 255.255.255.0 up1. 添加直连网段路由关键步骤ip route add 192.168.213.0/24 dev eth02. 再次尝试添加默认网关ip route add default via 192.168.213.1 dev eth0####################