dhclient                 //自动获取IP(通过DHCP

ifconfig  -a              //查看网卡信息

[root@wangchao ~]# ifconfig -a

eth0      Link encap:Ethernet  HWaddr 00:0C:29:47:DF:59

          inet addr:192.168.137.22  Bcast:192.168.137.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe47:df59/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:66 errors:0 dropped:0 overruns:0 frame:0

          TX packets:79 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:8105 (7.9 KiB)  TX bytes:9539 (9.3 KiB)

          Interrupt:19 Base address:0x2000

 

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:10 errors:0 dropped:0 overruns:0 frame:0

          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:688 (688.0 b)  TX bytes:688 (688.0 b)

 

手动配置IP地址

[root@wangchao ~]#vim  /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

HWADDR=00:0C:29:47:DF:59

TYPE=Ethernet

UUID=240760af-14a7-4da5-8cb5-d1e08d2319f4

ONBOOT=yes                                            //开机自启动

NM_CONTROLLED=yes

BOOTPROTO=static                                       //设置IP地址为静态

IPADDR=192.168.137.22                                   //IP地址

NETMASK=255.255.255.0                                  //网络掩码

GATEWAY=192.168.137.1                                  //网关

DNS1=8.8.8.8                                            //DNS

DNS2=114.114.114.114

 

配置好IP地址后重启网络

[root@wangchao ~]# service network restart

Shutting down interface eth0:  Device state: 3 (disconnected)

                                                           [  OK  ]

Shutting down loopback interface:                          [  OK  ]

Bringing up loopback interface:                            [  OK  ]

Bringing up interface eth0:  Active connection state: activated

Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/1

                                                           [  OK  ]

 

或单独重启某网卡

[root@wangchao ~]# ifdown eth0

[root@wangchao ~]# ifup eth0