Configure static IP addresses for RHEL

For the first NIC:

(1) configure the nic ip address, modify the content of the/etc/sysconfig/network-scripts/ifcfg-eth0 file:

Device = eth0 # Physical device name

Bootproto = static # Static allocation

Broadcast = 255.255.255.255 # Broadcast address (optional)

Ipaddr = 192.168.1.103 # This is the static IP address you set

Netmask = 255.255.255.0 # Subnet Mask

Network = 192.168.1.0 # Network address (optional)

Hwaddr = 00: 0C: 29: 01: 98: 27 # MAC address

Gateway = 192.168.1.1 # Gateway address

Onboot = Yes # Whether to activate the device during boot

(2) configure the nic dns:

Modify the/etc/resolv. conf file:

Nameserver 202.109.14.5 # Primary DNS
Nameserver 219.141.136.10 # Secondary DNS
Search localdomain

(3) restart the network service:

Service Network restart

Or

/Etc/init. d/network restart

(4) Note: If you back up the/etc/sysconfig/network-scripts/ifcfg-eth0 file and back up it in the same directory (for example, back up the file name for the ifcfg-eth0_bak), so even if you configure the static IP address according to the above steps, restart the network service, it may also find that the IP address does not become your configured static IP address, what is going on? Because RHEL still reads the configuration of the ifcfg-eth0_bak file, so you can move this file to another folder, and then restart the network service to try, this time your static IP configuration takes effect, I have encountered this problem twice.