CentOS7设置静态IP

在 CentOS 中从命令行设置静态IP。

首先找一下需要静态IP的网卡是哪个，比如我这里需要静态的网卡是ens33

[root@itp-A network-scripts]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.138.129  netmask 255.255.255.0  broadcast 172.16.138.255
        inet6 ----::----:----:----:----  prefixlen 64  scopeid 0x20<link>
        ether 00:00:00:00:00:00  txqueuelen 1000  (Ethernet)
        RX packets 24406  bytes 34264994 (32.6 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 10661  bytes 746079 (728.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

切换到这个文件夹

cd  /etc/sysconfig/network-scripts/

可见该文件下有如下文件：

[root@itp-A network-scripts]# ll -a
total 240
drwxr-xr-x. 2 root root  4096 Sep 18 23:45 .
drwxr-xr-x. 6 root root  4096 Sep 18 23:46 ..
-rw-r--r--. 1 root root   310 Sep 18 23:34 ifcfg-ens33
-rw-r--r--. 1 root root   254 May 22  2020 ifcfg-lo
lrwxrwxrwx. 1 root root    24 Sep 18 23:45 ifdown -> ../../../usr/sbin/ifdown
-rwxr-xr-x. 1 root root   654 May 22  2020 ifdown-bnep
-rwxr-xr-x. 1 root root  6532 May 22  2020 ifdown-eth
-rwxr-xr-x. 1 root root   781 May 22  2020 ifdown-ippp
-rwxr-xr-x. 1 root root  4540 May 22  2020 ifdown-ipv6
lrwxrwxrwx. 1 root root    11 Sep 18 23:45 ifdown-isdn -> ifdown-ippp
-rwxr-xr-x. 1 root root  2130 May 22  2020 ifdown-post
-rwxr-xr-x. 1 root root  1068 May 22  2020 ifdown-ppp
-rwxr-xr-x. 1 root root   870 May 22  2020 ifdown-routes
-rwxr-xr-x. 1 root root  1456 May 22  2020 ifdown-sit
-rwxr-xr-x. 1 root root  1621 Dec  9  2018 ifdown-Team
-rwxr-xr-x. 1 root root  1556 Dec  9  2018 ifdown-TeamPort
-rwxr-xr-x. 1 root root  1462 May 22  2020 ifdown-tunnel
lrwxrwxrwx. 1 root root    22 Sep 18 23:45 ifup -> ../../../usr/sbin/ifup
-rwxr-xr-x. 1 root root 12415 May 22  2020 ifup-aliases
-rwxr-xr-x. 1 root root   910 May 22  2020 ifup-bnep
-rwxr-xr-x. 1 root root 13758 May 22  2020 ifup-eth
-rwxr-xr-x. 1 root root 12075 May 22  2020 ifup-ippp
-rwxr-xr-x. 1 root root 11893 May 22  2020 ifup-ipv6
lrwxrwxrwx. 1 root root     9 Sep 18 23:45 ifup-isdn -> ifup-ippp
-rwxr-xr-x. 1 root root   650 May 22  2020 ifup-plip
-rwxr-xr-x. 1 root root  1064 May 22  2020 ifup-plusb
-rwxr-xr-x. 1 root root  4997 May 22  2020 ifup-post
-rwxr-xr-x. 1 root root  4154 May 22  2020 ifup-ppp
-rwxr-xr-x. 1 root root  2001 May 22  2020 ifup-routes
-rwxr-xr-x. 1 root root  3303 May 22  2020 ifup-sit
-rwxr-xr-x. 1 root root  1755 Dec  9  2018 ifup-Team
-rwxr-xr-x. 1 root root  1876 Dec  9  2018 ifup-TeamPort
-rwxr-xr-x. 1 root root  2780 May 22  2020 ifup-tunnel
-rwxr-xr-x. 1 root root  1836 May 22  2020 ifup-wireless
-rwxr-xr-x. 1 root root  5419 May 22  2020 init.ipv6-global
-rw-r--r--. 1 root root 20678 May 22  2020 network-functions
-rw-r--r--. 1 root root 30988 May 22  2020 network-functions-ipv6

在其中找到ifcfg-+你的网卡名的文件，打开该文件

TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
# BOOTPROTO参数指定IP设置方式
# 改为static即为静态IP
BOOTPROTO="dhcp"
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="30c7f540-670d-4074-b1db-9789682f4adc"
DEVICE="ens33"
ONBOOT="yes"

同时在文件最下方加入

IPADDR=192.168.10.10 #静态IP  
GATEWAY=192.168.10.1 #默认网关  
NETMASK=255.255.255.0 #子网掩码  
DNS1=192.168.10.1 #DNS 配置

最后重启网卡即可。

systemctl restart network