Ifconfig, IP command explanation, route routing configuration, DNS configuration

Linux: The network is a kernel feature

Change the NIC name

Rhel5:/etc/modprobe.cong

Rhel6:/etc/udev/rules.d/70-persistent-net.rules

Ifconfig eth0 displays only one network card information

-A: Displays configuration information for all interfaces

Ifconfig eth0 Ip/mask [Down|up]

The configured address takes effect immediately, but fails to restart the Network service or host

Network services:

RHEL5:/etc/init.d/network [Start|stop|restart|status]

RHEL6: Support the above script, the default is the following script, but the function is not very perfect, not supported on the cluster

Recommended to disable

/etc/init.d/networkmanager [Start|stop|restart|status]

Gateway:

Route View routing Table

Add: Adding

-host: Host Routing

-net: Network Routing

-net 0.0.0.0

Route add default GW 192.168.1.1

Route add-net 192.168.2.0/24 GW 192.168.1.1

Del: Delete route

Route del-net 192.168.2.0/24 GW 192.168.1.1

Delete default route

Route Del-net 0.0.0.0

Route del Default

All changes fail after restarting network service or host

Network configuration file:

/etc/sysconfig/network

Network Interface configuration file

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

Device=eth0

#关联的设备名, be consistent with the eth0 of the file name

Bootproto=dhcp

#引导协议: BOOTPROTO={DHCP|NONE|STATIC|BOOTP}

/* Static is used

Ipaddr=:ip Address

netmask=: Subnet Mask

gateway=: Setting the default gateway

*/

Onboot=: Whether this network interface is activated automatically when powered on Yes|no

Hwaddr=: Hardware address, to be consistent with the hardware address, you can omit

Userctl=no whether No|yes allows normal user to control interface change

Peerdns=yes If Bootproto is DHCP is the DNS address specified by the DHCP server to be accepted

Does not take effect immediately, but after restarting the network service or the host is in effect

Routing

/etc/sysconfig/network-scripts/route-ethx

Add format One

DEST via Nexthop

10.0.0.0/8 via 192.168.1.1

Network segment next hop IP

Add format Two

Address0= Network Segment

Netmask0= Network Segment Mask

gateway0= Gateway

The DNS server specifies a method with only one

/etc/resolv.conf

NameServer nds_ip_1

Nameserverdns_ip_2

Specify local resolution:

/etc/hosts

Host IP host name host Alias

192.168.5.26 lm.lv1314

Dns--/etc/hosts--nds

Configure host Name:

hostname hostname

Effective immediately, but not permanently

/etc/syscofig/network

Hostname=

Restart takes effect

/etc/sysconfig/network

Networking=yes whether the network function is enabled

~ ... Ipv6=no

Hostname=localhost.localdomain

Configuration method:

Ifconfig ethx:x Ip/netmask

/etc/sysconfig/network-scripts/ifcfg-ethx:x

Device=ethx:x

Non-primary addresses cannot be dynamically obtained using DHCP;

This article is from the "Wang Liming" blog, make sure to keep this source http://80cto.blog.51cto.com/7503144/1774394

Ifconfig, IP command explanation, route routing configuration, DNS configuration