ubuntu 网络管理

1 查看ip地址
root@u22-tools-20:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:32:93:36 brd ff:ff:ff:ff:ff:ff
    altname enp2s1
    inet 192.168.254.20/24 brd 192.168.254.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe32:9336/64 scope link 
       valid_lft forever preferred_lft forever

备注：
 ens33 网络接口
 inet 192.168.254.20/24  ip地址

2 查看路由
root@u22-tools-20:~# ip route
default via 192.168.254.2 dev ens33 proto static 
192.168.254.0/24 dev ens33 proto kernel scope link src 192.168.254.20 

3 设置静态ip地址

root@u22-tools-20:~# vim /etc/netplan/00-installer-config.yaml 
# This is the network config written by 'subiquity'
network:
  ethernets:
    ens33:
      addresses:
      - 192.168.254.20/24
      nameservers:
        addresses:
        - 192.168.254.2
        search: []
      routes:
      - to: default
        via: 192.168.254.2
  version: 2

#让修改网络配置生效
root@u22-tools-20:~# netplan apply
WARNING:root:Cannot call Open vSwitch: ovsdb-server.service is not running.

  备注： 
  ens33:
      addresses:  ip地址

   nameservers:
        addresses:  网关

   routes:
      - to: default  DNS