CentOS配置ip[快速配置]

1：查看网卡的DNS的配置文件:

注：不需要修改.

[root@localhost ~]# cat /etc/resolv.conf
# Generated by NetworkManager
search lan
nameserver fd7b:ac2f:6d73::1

注：在重启网络服务[service network restart]后,
       系统会自动使用[/etc/sysconfig/network-scripts/ifcfg-enp0s3]中eg:DNS1=8.8.8.8,
       自动设置[/etc/resolv.conf]中nameserver的配置为eg:nameserver 8.8.8.8,
       此为自动设置成功,手动设置,重启网络服务将被覆盖或清空！

设置参数：

8.8.8.8       #google域名服务器
8.8.4.4       #google域名服务器
192.168.10.1  #网卡对应的网关的IP地址(默认网关)
255.255.255.0 #网卡对应的网络掩码(子网掩码)
192.168.10.56 #网卡对应的ip地址

2：修改网卡的网关的配置文件:

[root@localhost sysconfig]# pwd
/etc/sysconfig
[root@localhost sysconfig]# vim network
[root@localhost sysconfig]# cat network

# Created by anaconda
NETWORKING=yes
HOSTNAME=CentOS-Slave1
NETWORKING_IPV6=no
PEERNTP=no
GATEWAY=192.168.10.1

注：设置本机的主机名,这里设置的主机名要/etc/sysconfig/network和/etc/hosts中设置的主机名对应一致(可选)

3：修改网卡的IP地址的配置文件：

[root@CentOS-Slave1 network-scripts]# pwd
/etc/sysconfig/network-scripts
[root@CentOS-Slave1 network-scripts]# vim ifcfg-enp0s3
[root@CentOS-Slave1 network-scripts]# cat ifcfg-enp0s3

DEVICE=enp0s3
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.10.56
NETMASK=255.255.255.0
DNS1=8.8.8.8
DNS2=8.8.4.4

centos7详细配置见,备注附件！

4：修改主机名配置文件：
注：手动添加ip和主机名,第三行.

[root@localhost etc]# pwd
/etc
[root@localhost etc]# vim hosts
[root@localhost etc]# cat hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.56 CentOS-Slave1

5：重启网络服务：

[root@localhost init.d]# service network restart
Restarting network (via systemctl):                        [  OK  ]

6：再次查看网卡的DNS的配置文件：

[root@localhost init.d]# cat /etc/resolv.conf
# Generated by NetworkManager
search lan lan.
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver fd7b:ac2f:6d73::1

注：DNS已经配置完毕！

7：查看主机名称[重启生效]：

[root@localhost init.d]# hostname
CentOS-Slave1

查看ip：

[root@CentOS-Slave1 /]# ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.10.56  netmask 255.255.255.0  broadcast 192.168.10.255
        inet6 fe80::a00:27ff:fe87:b3c0  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:87:b3:c0  txqueuelen 1000  (Ethernet)
        RX packets 44075  bytes 47664947 (45.4 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 9704  bytes 1365665 (1.3 MiB)
        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 0  (Local Loopback)
        RX packets 3  bytes 303 (303.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3  bytes 303 (303.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

详细讲解ip配置查看：CentOS的ip设置/Ubuntu的ip设置:在Oracle VM VirtualBOX下CentOS 7/Ubuntu 系统设置网络：接入internet（上网）和 局域网 ip

备注附件：

DEVICE=enp0s3
TYPE=Ethernet
BOOTPROTO=static
ONBOOT=yes
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=enp0s3
UUID=f4ff103e-5adc-4456-b338-d66b1b63bb46
IPADDR=192.168.10.56
NETMASK=255.255.255.0
DNS1=8.8.8.8
DNS2=8.8.4.4