Linux Network configuration

1, immediately effective, the changes made after restarting the network service or host failure

A. network card, IP, mask

Network card naming method

Ethernet: EthX

Ifconfig is a network card that is used to view the active status on the current host, and can also be configured, enabled, or disabled for the command

IFCONFIG-A: View all network cards on the host

Ifconfig eth0: View information for eth0 NIC

Specify IP address: ifconfig eth0 192.168.1.1/24

Ifconfig eth0 172.16.10.1/16

Ifconfig eth0 10.0.0.0/8

B. Gateway:

Route

Add: Adding

-host: Host Routing

-net: Network Routing

-net 0.0.0.0

Route add-net|host DEST GW Nexthop

Route add default GW nexthop

Route add-net 10.0.0.0/8 GW 192.168.10.1 #10.0.0.0 via 192.168.10.1

Route add default GW 192.168.10.1

Del: Delete

-host

-net

Route Del-net 10.0.0.0/8

Route Del-net 0.0.0.0

Route del Default

View:

Route

Route-n: Digitally display information about each host or port

2, the configuration will not take effect after the network service or host to restart

Network Service configuration file (permanent)

rhel5:/etc/init.d/network {Start|stop|restart|status}

Rhel6:/etc/init.d/networkmanager {Start|stop|restart|status} But the current function is not perfect, so disable this function, enable the function of RHEL5

A. IP address and subnet hidden code address

Network Interface configuration file:

/etc/sysconfig/network-scripts/ifcfg-interface_name

Device=: The associated device name, to be consistent with the file name's back office "Interface_name"

BOOTPROTO={STATIC|NONE|DHCP|BOOTP}: Boot protocol: To use a static address, use a passive or none:dhcp representation to obtain an address using a DHCP server

Ipaddr=:ip Address

netmask=: Subnet Mask

gateway=: Setting the default gateway

Onboot=: Whether to automatically activate the secondary network interface when powering on

Hwaddr=: Hardware address, to be consistent with the address in the hardware, can save

Userctl={yes|no}: Whether ordinary users are allowed to control this interface

Peerdns={yes|no}: Whether the DNS address specified by the DHCP server is accepted when Bootproto is DHCP

Cases:

# vim/etc/sysconfig/network-scripts/ifcfg-eth0device=eth0hwaddr=00:0c:29:c0:1c:8ftype=ethernetuuid= D63853e2-b0e9-4b15-a21e-a09aeca9212eonboot=no--ONBOOT=YESNM_CONTROLLED=YESBOOTPROTO=DHCP-BOOTPROT O=static--ipaddr=192.168.1.21-netmask=255.255.255.0

B. Gateway address, configuring host name

# vim/etc/sysconfig/networknetworking=yeshostname=localhost--Hostname=user-->gateway =192.168.1.254

c. DNS Configuration

The DNS server specifies only one method:

Edit/etc/resolv.vonf

NameServer dns_tp_1

NameServer dns_tp_2

NameServer 172.16.0.1

NameServer 202.102.224.68

Cases:

# vim/etc/resolv.conf--NameServer 192.168.1.254

Restart the network after the configuration is complete to connect to the Internet

# Service Network Restart #重启网络

This article is from the "three elder brother" blog, please be sure to keep this source http://523958392.blog.51cto.com/9871195/1631346

Linux Network configuration