Linux IP address failure

Linux IP address failure problems in Linux often use the ifconfig command to set the IP address, but after each setting is complete, the IP address will be cleared after the server is restarted. The specific reason is that the ifconfig configuration only takes effect temporarily and is not written to the system configuration file. If you want the IP address to be persistent, you need to modify the network configuration file. In this article, CentOS 6.3 is used as an example. Different Linux releases may vary. 1. Check the NIC information of the server. The current Nic name and MAC address are displayed. the MAC address is the HWaddr. 2, set the NIC configuration file to enter the/etc/sysconfig/network-scripts directory, view the current directory file, you will find a ifcfg-eth9 file, eth9 corresponds to the network Card Name, if no, a file is created. Add the following information to the corresponding Nic configuration file: DEVICE = "eth9" TYPE = "Ethernet" BOOTPROTO = static HWADDR = "08: 00: 27: CF: 36: f0 "IPADDR = 192.168.56.101 NETMASK = 255.255.255.0 BROADCAST = 192.168.56.255 255.6init = no 255.6_autoconf = no ONBOOT =" yes "Description: whether to activate the nic broadcast address NETMASK subnet mask BOOTPROTO when the ONBOOT system starts, and set static to set dhcp dynamic acquisition. 3. The ifconfig command briefly introduces how to set the IP address ifconfig Nic name IP address netmask subnet mask enable the NIC ifconfig Nic name up disable the NIC ifconfig Nic name down