配置静态IP

临时

# 1. 添加临时IP（重启网卡/机器失效）
ip addr add 192.168.1.100/24 dev eth0
# 2. 添加默认路由（所有跨网段流量走网关）
ip route add default via 192.168.1.1 dev eth0
# 先备份原有配置（可选）
cp /etc/resolv.conf /etc/resolv.conf.bak
# 写入DNS服务器
echo "nameserver 114.114.114.114" > /etc/resolv.conf
# 可选：再加一个备用DNS
echo "nameserver 8.8.8.8" >> /etc/resolv.conf

永久

Ubuntu

修改配置文件：/etc/netplan/00-installer-config.yaml

# This is the network config written by 'subiquity'
network:
  ethernets:
    ens2f0:
      dhcp4: no
      addresses:
        - 192.168.xx.xx/24
      routes:
        - to: default
          via: 192.168.xx.xx
      nameservers:
        addresses: [114.114.114.114, 8.8.8.8]
      dhcp6: no
  version: 2

openEuler/Kylin

修改配置文件: /etc/sysconfig/network-scripts/ifcfg-enp125s0f0

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME=enp125s0f0
UUID=7ead2d53-f3d0-4189-b6df-7432ef483673
DEVICE=enp125s0f0
ONBOOT=yes
IPADDR=192.168.xx.xx
NETMASK=255.255.255.0
GATEWAY=192.168.xx.xx
DNS1=114.114.114.114

重启网络服务：systemctl restart NetworkManager