Explain the static IP Settings for learning Centos 7

This study is mainly about Centos 7.0.1406!

1. Edit the ifcfg-eth0 file. When vim is minimized, it is not installed.

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

2. Modify the following contents

BOOTPROTO="static" #dhcp Instead of static  
ONBOOT="yes" # Startup enables this configuration  
IPADDR=192.168.7.106 # static IP 
GATEWAY=192.168.7.1 # The default gateway  
NETMASK=255.255.255.0 # Subnet mask  
DNS1=192.168.7.1 #DNS  configuration  

3. Effect after modification

# cat /etc/sysconfig/network-scripts/ifcfg-eth0 
HWADDR="00:15:5D:07:F1:02" 
TYPE="Ethernet" 
BOOTPROTO="static" #dhcp Instead of static  
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="eth0" 
UUID="bb3a302d-dc46-461a-881e-d46cafd0eb71" 
ONBOOT="yes" # Startup enables this configuration  
IPADDR=192.168.7.106 # static IP 
GATEWAY=192.168.7.1 # The default gateway  
NETMASK=255.255.255.0 # Subnet mask  
DNS1=192.168.7.1 #DNS  configuration  

4. Restart the network service

# service network restart 

5. To view the effect after modification, Centois 7 will no longer use ifconfig but ip command to view network information.

# ip addr 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN  
  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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 
  link/ether 00:15:5d:07:f1:02 brd ff:ff:ff:ff:ff:ff 
  inet 192.168.7.106/24 brd 192.168.7.255 scope global eth0 
    valid_lft forever preferred_lft forever 
  inet6 fe80::215:5dff:fe07:f102/64 scope link  
    valid_lft forever preferred_lft forever