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This article mainly introduces "how to configure the centos network card to modify the ip address and modify the gateway". In the daily operation, I believe many people have doubts about how to configure the centos network card to modify the ip address and modify the gateway. The editor consulted all kinds of materials and sorted out a simple and easy-to-use operation method. I hope it will be helpful for everyone to answer the doubt about "how to configure the network card to modify the ip address and modify the gateway". Next, please follow the editor to study!

1. CentOS modifies IP address

Modify the configuration file of the IP address of the corresponding network card

The code is as follows:

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

Modify the following

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 the way the network card obtains the ip address. The possible options are static,dhcp or bootp, corresponding to the statically specified ip address, the ip address obtained through the dhcp protocol, and the ip address obtained through the bootp protocol.

Subnet broadcast address corresponding to BROADCAST=192.168.0.255 #

Physical address of the network card corresponding to HWADDR=00:07:E9:05:E8:B4 #

IPADDR=12.168.1.2 # if you set the way for the Nic to obtain the ip address statically, this field specifies the ip address corresponding to the Nic

IPV6INIT=no

IPV6_AUTOCONF=no

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 to set this network interface when the system starts. If it is set to yes, the device will be activated when the system starts.

II. CentOS modify gateway

Modify the configuration file of the gateway of the corresponding network card

The code is as follows:

[root@centos] # vi / etc/sysconfig/network

Modify the following

NETWORKING=yes (indicates whether the system uses a network, which is generally set to yes. If set to no, the network cannot be used, and many system services will not start)

HOSTNAME=centos (set the hostname of this machine, which corresponds to the hostname set in / etc/hosts)

GATEWAY=192.168.1.1 (sets the IP address of the gateway connected locally. For example, the gateway is 10.0.0.2)

3. CentOS modifies DNS

Modify the configuration file of the DNS of the corresponding network card

The code is as follows:

# vi / etc/resolv.conf

Modify the following

The code is as follows:

Nameserver 8.8.8.8 # google Domain name Server

Nameserver 8.8.4.4 # google Domain name Server

Restart the network configuration

The code is as follows:

# service network restart

Or

The code is as follows:

# / etc/init.d/network restart

Modify IP address

Effective immediately:

# ifconfig eth0 192.168.0.2 netmask 255.255.255.0

Start to take effect:

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

Modify gateway Default Gateway

Effective immediately:

# route add default gw 192.168.0.1 dev eth0

Start to take effect:

Modify / etc/sysconfig/network

Modify DNS

Modify / etc/resolv.conf

The modification can take effect immediately, and the startup is also effective.

Modify host name

Effective immediately:

The code is as follows:

# hostname centos1

Start to take effect:

Modify / etc/sysconfig/network

Modify the configuration of the network card

The code is as follows:

# vi / etc/udev/rules.d/70-persistent-net.rules

At this point, the study on "how to configure the centos network card to modify the ip address and modify the gateway" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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