常用linux 命令 -网络相关

浏览数：14 / 时间：2015年06月20日

一网络参数设置命令

1.ifconfig ：查询、设置网卡与IP网段等相关参数

1.1 man手册定义

DESCRIPTION
       Ifconfig  is used to configure the kernel-resident network interfaces.  It is used at boot time to set up
       interfaces as necessary.  After that, it is usually only needed when debugging or when system  tuning  is
       needed.

       If  no arguments are given, ifconfig displays the status of the currently active interfaces.  If a single
       interface argument is given, it displays the status of the given interface only; if a single -a  argument
       is  given,  it displays the status of all interfaces, even those that are down.  Otherwise, it configures
       an interface.

简译： ifconfig 习惯用于配置kernel-resident 网络接口，一般在启动时设置必要的接口。也用于debug和系统调试。

如果没有参数会列出当前激活（up status）的网络接口

如果接一个网络接口参数（ifconfig eth0）,会输出该接口的配置

如果后面参数是-a，会输出所有的网络接口（up 和down staus的网络接口）

1.2 命令输出简述

[root@test_1 net]# ifconfig
eth0      Link encap:Ethernet  HWaddr 84:2B:2B:94:F7:7D  
          inet addr:192.168.2.241  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::862b:2bff:fe94:f77d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1546524 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1652650 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:754067360 (719.1 MiB)  TX bytes:1474728958 (1.3 GiB)
          Interrupt:18 

eth0:1    Link encap:Ethernet  HWaddr 84:2B:2B:94:F7:7D  
          inet addr:192.168.2.242  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:18 

eth0:2    Link encap:Ethernet  HWaddr 84:2B:2B:94:F7:7D  
          inet addr:192.168.2.243  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:18 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:594 errors:0 dropped:0 overruns:0 frame:0
          TX packets:594 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:51885 (50.6 KiB)  TX bytes:51885 (50.6 KiB)