Ubuntu18.04 修改IP地址、查看网关、防火墙

1. Ubuntu18.04 修改IP地址

修改 sudo vim /etc/netplan/50-cloud-init.yaml文件

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp0s3:
            addresses: [192.168.33.34/]
            gateway4: 192.168.33.1
            dhcp4: no
　　　　　　　optional: no
　　　　　　  nameservers:
　　　　　　　　addresses: [114.114.114.114,192.168.0.1]　　　　　　
    version: 

运行 sudo netplan apply 使配置生效，通过 ifconfig 查看ip是否配置成功

2. 查看网关

route -n
netstat -r

3. 防火墙开启/关闭

ufw enable
ufw disable