Centos7如何配置IPADDR，NETMASK，GATEWAY？

1、获取IPADDR、NETMASK：

[root@192 network-scripts]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.85.139  netmask 255.255.255.0  broadcast 192.168.85.255
        inet6 fe80::11df:c601:5b38:ca41  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:fe:f2:7d  txqueuelen 1000  (Ethernet)
        RX packets 750  bytes 60532 (59.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 500  bytes 94739 (92.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 8  bytes 696 (696.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 8  bytes 696 (696.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

2、获取GATEWAY：

[root@192 network-scripts]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.85.2    0.0.0.0         UG    100    0        0 ens33
192.168.85.0    0.0.0.0         255.255.255.0   U     100    0        0 ens33

3、配置IPADDR，NETMASK，GATEWAY：

[root@192 sysconfig]# cd /etc/sysconfig/network-scripts
[root@192 network-scripts]# ls
ifcfg-ens33  ifdown-eth   ifdown-post    ifdown-Team      ifup-aliases  ifup-ipv6   ifup-post    ifup-Team      init.ipv6-global
ifcfg-lo     ifdown-ippp  ifdown-ppp     ifdown-TeamPort  ifup-bnep     ifup-isdn   ifup-ppp     ifup-TeamPort  network-functions
ifdown       ifdown-ipv6  ifdown-routes  ifdown-tunnel    ifup-eth      ifup-plip   ifup-routes  ifup-tunnel    network-functions-ipv6
ifdown-bnep  ifdown-isdn  ifdown-sit     ifup             ifup-ippp     ifup-plusb  ifup-sit     ifup-wireless

vi ifcfg-ens33

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=192.168.85.139
NETMASK=255.255.255.0
GATEWAY=192.168.85.2
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=f3bf2c45-d6af-408e-bcc9-d11b06cae1ad
DEVICE=ens33
ONBOOT=yes

4、修改完后重启网卡：

systemctl restart network