经常需要把局域网内部服务器设置静态IP地址，接下来讲Ubuntu的命令行模式下完成这件事。
获取当前主机的IP和子网掩码 $ ifconfigens33 Link encap:Ethernet HWaddr 00:0c:29:f8:fc:d1 inet addr:192.168.79.128 Bcast:192.168.79.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fef8:fcd1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:741 errors:0 dropped:0 overruns:0 frame:0 TX packets:495 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:64463 (64.4 KB) TX bytes:83013 (83.0 KB)lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:992 errors:0 dropped:0 overruns:0 frame:0 TX packets:992 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:74912 (74.9 KB) TX bytes:74912 (74.9 KB)我们使用的网卡名叫 ens33 ,IP地址是 192.168.79.128 ,子网掩码是 255.255.255.0
获取网关 $ ip routedefault via 192.168.79.2 dev ens33 onlink 192.168.79.0/24 dev ens33 proto kernel scope link src 192.168.79.128网关地址是 192.168.79.2，我们可以把DNS也指定为网关地址
修改配置文件 sudo vi /etc/network/interfaces修改配置文件内容如下，请根据自己的实际情况填写
# This file describes the network interfaces available on your system# and how to activate them. For more information, see interfaces(5).source /etc/network/interfaces.d/*# The loopback network interfaceauto loiface lo inet loopback# The primary network interfaceauto ens33iface ens33 inet staticaddress 192.168.79.128# IP地址netmask 255.255.255.0# 子网掩码gateway 192.168.79.2# 网关dns-nameserver 192.168.79.2# DNS服务器 重启网络 sudo systemctl restart networking