Linux configuration Ifcfg-ethx

/etc/sysconfig/network includes host basic network information for system startup

/etc/sysconfig/network-script/This directory is the system to start the most initialized network information

/etc/sysconfig/network-script/ifcfg-eth0 Network configuration information

/ETC/XINETD.CONF defines a network service initiated by the super process xinetd

/etc/protocols set the protocol for the host to use and the protocol number of each protocol

/etc/services set the host's different port network services

Network Configuration Tool

Ifcfg-eth0 Configuration

2010-03-15 17:39

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

The following values are common in all basic configuration files:

* Device=name, where name is the name of the physical device (except for dynamically assigned PPP devices)

Its name is "logical name."

* Ipaddr=addr, here addr is the IP address.

* Netmask=mask, here Mask is a netmask.

* Network=addr, here addr is the network address.

* Broadcast=addr, here addr is the broadcast address.

* Gateway=addr, here addr is the gateway address.

* Onboot=answer, here answer take one of the following values:

o Yes-this device will be activated at boot time.

o No-this device is not activated when boot.

* Userctl=answer, here answer take one of the following values:

o Yes-a non-root user can control the device.

o No-the device is not allowed to be controlled by a non-root user.

* Bootproto=proto, here Proto take one of the following values:

o None--does not use the boot-time protocol.

o BOOTP-use BOOTP protocol.

o DHCP-use DHCP protocol.

*************************************************************************

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

Device=eth0 Interface Name

Bootproto=none static configuration, if the value is "DHCP" is dynamically obtained, and Static is also the representation of a quiescent IP address

broadcast=192.168.10.255 broadcast address, automatically calculated by IP address and subnet mask

Hwaddr=00:13:d3:27:9f:80

ipaddr=192.168.10.238

Ipv6init=yes

Ipv6_autoconf=yes

netmask=255.255.255.0

network=192.168.10.0 Specifies the network, automatically calculated by IP address and subnet mask

Onboot=yes load automatically when powered on

gateway=192.168.10.1

Type=ethernet

Peerdns=yes

Userctl=no

Ifdown Eth0 shut down the network

Ifconfig eth0 down the network

Ifup eth0 Open Network

Ifconfig eth0 up Open Network

Set dns/etc/resolv.conf

NameServer 61.144.56.101

NameServer 202.96.128.166

[Yeger@yeger ~]$ cat/etc/resolv.conf

# Generated by NetworkManager

NameServer 202.96.128.86

NameServer 202.96.128.166

Other aspects

Service network start/starting network services

Service network stop//stops network services

Service Network restart//Restart network services

Service Network status//view Network Service status

Ifconfig eth0 192.168.10.222 netmask 255.255.255.0//Temporarily modify interface IP address (no need to reboot interface)

[Yeger@yeger ~]$ sudo ifconfig wlan0 192.168.21.199 netmask 255.255.255.0

[Yeger@yeger ~]$ ifconfig Wlan0

Wlan0 Link encap:ethernet hwaddr 00:02:72:77:bb:d1

inet addr:192.168.21.199 bcast:192.168.21.255 mask:255.255.255.0

Inet6 ADDR:FE80::202:72FF:FE77:BBD1/64 Scope:link

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:3246 errors:0 dropped:0 overruns:0 frame:0

TX packets:1947 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:4514869 (4.3 MiB) TX bytes:177732 (173.5 KiB)

Wlan0 represents the first wireless Ethernet card

Link EnCap represents the name of the network adapter at the OSI Physical layer (physical Layer)