Linux - static IP and dynamic IP settings

1. Type in the terminal

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

The static ip template is as follows:

DEVICE="eth0" #NIC name
BOOTPROTO="static" #Static IP (required)
HWADDR="00:0C:29:B5:65:CA" #Network card mac address
IPV6INIT="yes"             
NM_CONTROLLED="yes"
ONBOOT="yes" #Automatically start at boot (required)
TYPE="Ethernet" #Network type
UUID="e7b6ffae-6614-4ad3-bc96-ba4d18a6559f"
IPADDR="192.168.238.133" #IP address (required)
NETMASK="255.255.255.0" #Subnet mask (required)
GATEWAY="192.168.238.1" #Gateway (required)
DNS1=xxxx #Domain name server address (depending on the situation)

There are required fields on it, they must be filled in, and the others can be left as default. 

Restart network services. service network restart or /etc/init.d/network restart

Remark:

BOOTPROTO properties have types

1. BOOTPROTO=static static IP
2. BOOTPROTO=dhcp dynamic IP
3. BOOTPROTO=none None (do not specify)

2. Dynamic IP configuration

The dynamic IP configuration template is as follows:

DEVICE="eth0"
BOOTPROTO="dhcp"
HWADDR="00:0C:29:C1:5A:74"
ONBOOT="yes"
TYPE="Ethernet"
UUID="3c9a9469-ff5f-4d7d-96b4-bc8e48d4cb96"

 

Run the command: dhclient eth1 

Obtain dynamic IP address automatically