Ubuntu 20.04 LTS 修改IP地址

心已赠人 2022-08-28 08:54 355阅读 0赞

# Ubuntu 20.04 LTS 修改IP地址 #

Ubuntu 20.04 LTS系统中修改IP地址，将DHCP自动分配的IP地址`192.168.1.66`改为静态IP地址`192.168.1.75`。

## 查看IP地址 ##

ens18: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 192.168.1.66  netmask 255.255.255.0  broadcast 192.168.1.255
            inet6 fe80::4029:99ff:febe:719f  prefixlen 64  scopeid 0x20<link>
            ether 42:29:99:be:71:9f  txqueuelen 1000  (Ethernet)
            RX packets 2494  bytes 306105 (306.1 KB)
            RX errors 0  dropped 22  overruns 0  frame 0
            TX packets 384  bytes 51282 (51.2 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

## 查看netplan配置文件 ##

$ sudo cat /etc/netplan/00-installer-config.yaml
    # This is the network config written by 'subiquity'
    network:
      ethernets:
        ens18:
          dhcp4: true
      version: 2

*默认配置是采用DHCP自动获取动态IP。*

## 备份netplan配置文件 ##

sudo cp /etc/netplan/00-installer-config.yaml /etc/netplan/00-installer-config_backup.yaml

## 修改netplan配置文件 ##

$ sudo vim /etc/netplan/00-installer-config.yaml
    # This is the network config written by 'subiquity'
    network:
      ethernets:
        ens18:
          dhcp4: no
          addresses: [192.168.1.75/24,]
          gateway4: 192.168.1.1
          nameservers:
            addresses: [8.8.8.8, 127.0.0.53]
      version: 2

[更多`netplan`命令参考官方网站][netplan]。

## 检测netplan配置 ##

$ sudo netplan try
    Warning: Stopping systemd-networkd.service, but it can still be activated by:
      systemd-networkd.socket
    Do you want to keep these settings?
    
    
    Press ENTER before the timeout to accept the new configuration
    
    
    Changes will revert in 117 seconds
    Configuration accepted.

*  **netplan try**：应用配置并等待用户确认；如果网络损坏或未给出确认，将回滚。
 *  **netplan apply**：应用渲染器的所有配置，必要时重新启动它们。

## 再次查看IP地址 ##

ens18: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 192.168.1.75  netmask 255.255.255.0  broadcast 192.168.1.255
            inet6 fe80::4029:99ff:febe:719f  prefixlen 64  scopeid 0x20<link>
            ether 42:29:99:be:71:9f  txqueuelen 1000  (Ethernet)
            RX packets 61995  bytes 4987543 (4.9 MB)
            RX errors 0  dropped 22  overruns 0  frame 0
            TX packets 3769  bytes 2592311 (2.5 MB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[netplan]: https://netplan.io/