Modify the file: / etc / sysconfig / Network-scripts / ifcfg- eth0
the DEVICE = eth0
the TYPE = Ethernet
BOOTPROTO = static
IPADDR = 192.168 . 1.100
NETMASK = 255.255 . 255.0
GATEWAY = 192.168 . 1.1
NM_CONTROLLED = NO
ONBOOT = yes # open from the start
reboot card services
/etc/init.d/network restart