CentOS 7设置静态IP地址

本文将介绍如何在CentOS 7系统下设置静态IP地址

在CentOS 7系统中，默认的网卡名是ens33，配置文件是：/etc/sysconfig/network-scripts/ifcfg-ens33

第一步：使用编辑器对该文件进行编辑

vim /etc/sysconfig/network-scripts/ifcfg-eth0

第二步：在该文件中添加如下内容并保存

BOOTPROTO=static          =====此处原为dhcp，改为staticONBOOT=yes                =====设置开机加载此配置IPADDR=192.168.199.254    =====设置静态IP地址NETMASK=255.255.255.0     =====设置网络子网掩码GATEWAY=192.168.199.1     =====设置网关DNS1=192.168.199.1         =====设置DNS

设置完成后总体效果如下：

TYPE=EthernetBOOTPROTO=staticDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=cc2a07f2-4dac-4303-a2db-6b468551aae4DEVICE=ens33ONBOOT=yesPEERDNS=yesPEERROUTES=yesIPV6_PEERDNS=yesIPV6_PEERROUTES=yesIPADDR=192.168.199.254NETMASK=255.255.255.0GATEWAY=192.168.199.1DNS=192.168.199.1

第三步：重启网络服务

service network restart

第四步：查看IP修改效果

①使用ifconfig命令

ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.199.254  netmask 255.255.255.0  broadcast 192.168.199.255        inet6 fe80::3b18:474c:2cc6:ebab  prefixlen 64  scopeid 0x20<link>        ether 00:0c:29:34:75:ef  txqueuelen 1000  (Ethernet)        RX packets 1117  bytes 163064 (159.2 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 641  bytes 130472 (127.4 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo: 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 1  (Local Loopback)        RX packets 8  bytes 704 (704.0 B)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 8  bytes 704 (704.0 B)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255        ether 52:54:00:e7:4b:fc  txqueuelen 1000  (Ethernet)        RX packets 0  bytes 0 (0.0 B)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 0  bytes 0 (0.0 B)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

②使用ip addr命令

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:34:75:ef brd ff:ff:ff:ff:ff:ff    inet 192.168.199.254/24 brd 192.168.199.255 scope global ens33       valid_lft forever preferred_lft forever    inet6 fe80::3b18:474c:2cc6:ebab/64 scope link        valid_lft forever preferred_lft forever3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000    link/ether 52:54:00:e7:4b:fc brd ff:ff:ff:ff:ff:ff    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0       valid_lft forever preferred_lft forever4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000    link/ether 52:54:00:e7:4b:fc brd ff:ff:ff:ff:ff:ff

注意：如果BOOTPROTO那里不改成static且网络中有DHCP服务器的情况下，那么该网卡会通过DHCP获取到地址且静态地址同时生效。

以上内容为本人学习的笔记，如有任何错误，欢迎大神指正，在此先行谢过各位大神的帮助。