CentOS Set up network/etc/sysconfig/network,/etc/sysconfig/network-scripts/ifcfg-eth0

/etc/sysconfig/network

Used to set the "host name (HOSTNAME) and start network or not"

Generally, the host name takes effect after the reboot.

If you set up a gateway here, but you also reconfigure the gateway elsewhere and make it effective, use a different local gateway.

If the gateway is not configured elsewhere, the gateway is the subject.

Therefore, it may be caused by the gateway network problem, need to pay attention to ...

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

Restart Services: Service Network restart Eth0

Set form: Set value = value
The project project is set as follows:
DEVICE Interface Name (device, network card)
Bootproto IP Configuration method (static: Fixed IP, DHCP: Dynamic ip,none: Manual)

Hwaddr MAC Address
Onboot the network interface is active when the system is started (yes/no)
Type network types (usually Ethemet)
NETMASK Network Mask
IPADDR IP Address
Ipv6init IPV6 is valid (yes/no)
Gateway Default Gateways IP address

Device= "eth0" bootproto= "none" #BOOTPROTO = "DHCP" nm_controlled= "yes" onboot= "yes" type= "Ethernet" ipaddr= "192." 168.1.111 "netmask=" 255.255.255.0 "network=" 192.168.1.0 "broadcast=" 192.168.1.255 "

Device=eth0
Bootproto=static
broadcast=192.168.1.255
Hwaddr=00:0c:2x:6x:0x:xx
ipaddr=192.168.1.23
gateway=192.168.1.1 (default gateway configuration requires manual)
netmask=255.255.255.0
network=192.168.1.0
Onboot=yes
Type=etherne