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How to configure network configuration files in CentOS? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

CentOS modifies network-related configuration files such as IP addresses

Find the IP address profile of the corresponding network card: ifcfg-eth number.

Path: / etc/sysconfig/network-scripts/ifcfg-eth digit

Description of configuration items in the file

The code is as follows:

DEVICE=eth0 # describes the device alias corresponding to the Nic, for example, it is eth0 in the file of ifcfg-eth0

BOOTPROTO=static # sets how the network card obtains the ip address. The options are: static (static), dhcp (to obtain IP through DHCP) or bootp (to obtain IP using BOOTP protocol)

BROADCAST=192.168.0.255 # Subnet broadcast address

HWADDR=00:17:F3:05:18:20 # Network Card physical address (MAC)

Use this IP address when IPADDR=192.168.0.2 # BOOTPROTO=static

IPV6INIT=no # initialization of IPv6 function

Whether IPV6_AUTOCONF=no # automatically configures IPv6

The network mask for the NETMASK=255.255.255.0 # Nic

NETWORK=192.168.1.0 # Network address corresponding to the Nic

ONBOOT=yes # whether this device is enabled when the system starts, or activated when the system starts up when yes

# TYPE=Ethernet # Network Type

# USERCTL=no # whether non-root users can control the device

Additional update on March 18, 2014: do not set the parameter NETWORK in CentOS, it has been officially deprecated, and there may be a problem that the gateway cannot be successfully added after setting it.

CentOS official help: http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-networkscripts-interfaces.html

Configuration files related to CentOS gateway configuration

Path: / etc/sysconfig/network

Description of configuration items in the file

Copy the code

The code is as follows:

NETWORKING=yes # indicates whether the system uses a network, usually yes. If no, the network is not used and many system services cannot be started

# NETWORKING_IPV6=no # whether to enable IPv6

# FORWARD_IPV4=no # whether to enable IP forwarding

# HOSTNAME=localhost.localdomain # set the hostname of this machine. The value should correspond to the hostname set in / etc/hosts. When commented out, the hostname or domain name is generally resolved first, and then the DNS is resolved.

GATEWAY=192.168.1.1 # set the IP address of the gateway

# GATEWAYDEV=gateway # Gateway device name

CentOS official help: http://www.centos.org/docs/5/html/5.2/Deployment_Guide/s2-sysconfig-network.html

CentOS DNS-related configuration files

Path: / etc/resolv.conf

Description of configuration items in the file

Copy the code

The code is as follows:

# the most important thing is nameserver, others can be ignored

Nameserver 8.8.8.8 # google Domain name Server

Nameserver 8.8.4.4 # google Domain name Server

# search mitchellchu.com www.mitchellchu.com # define the search list of domain names

# domain mitchellchu.com # define a local domain name

# sortlist # sort the returned domain names

Network device restart

Service network restart

Or

/ etc/init.d/network restart

IP address modification

Effective immediately:

Ifconfig eth0 192.168.0.2 netmask 255.255.255.0

Take effect after restarting the network device

See modification of / etc/sysconfig/network-scripts/ifcfg-eth number

Modify the current gateway Default Gateway

Effective immediately:

Route add default gw 192.168.0.1 dev eth0

Effective after restarting the network device:

See: / etc/sysconfig/network configuration

Modify DNS

See: / etc/resolv.conf configuration

Effective immediately after modification

Modify hostname

Effective immediately:

Hostname centos1

Restart takes effect:

See: / etc/sysconfig/network configuration, note that there is also the configuration of / etc/hosts

This is the answer to the question about how to configure network configuration files in CentOS. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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