一、centos6.8

1、在当前目录下

[root@hadoop3 network-scripts]# pwd
/etc/sysconfig/network-scripts

2、修改ifcfg-eth0配置

将ONBOOT改成yes
将NM_CONTROLLED改成no

DEVICE=eth2
HWADDR=00:0c:29:de:ae:63
TYPE=Ethernet
UUID=47865222-c953-47ff-a69e-67db918a9d27
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=dhcp

3、重启network

service network restart

4、查看ip

[root@hadoop3 network-scripts]# ifconfig
eth2      Link encap:Ethernet  HWaddr 00:0C:29:DE:AE:63  
          inet addr:192.168.159.133  Bcast:192.168.159.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fede:ae63/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:240 errors:0 dropped:0 overruns:0 frame:0
          TX packets:154 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:22435 (21.9 KiB)  TX bytes:32049 (31.2 KiB)

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:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

二、centos7

1、在当前目录下

[root@hadoop3 network-scripts]# pwd
/etc/sysconfig/network-scripts

2、修改ifcfg-ens33配置

将ONBOOT改成yes

[root@localhost network-scripts]# vi ifcfg-ens33 

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
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=dbd95852-cbc9-4c8d-a0c1-fc1474195ac7
DEVICE=ens33
ONBOOT=yes

3、重启network

service network restart

4、查看ip

[root@localhost network-scripts]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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 forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:62:9c:77 brd ff:ff:ff:ff:ff:ff
    inet 192.168.159.139/24 brd 192.168.159.255 scope global noprefixroute dynamic ens33
       valid_lft 1633sec preferred_lft 1633sec
    inet6 fe80::e6f5:1f8a:8461:c73d/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

补充：如果IFCONFIG没办法用，使用如下命令安装一个工具

yum -y install net-tools