CentOS 网络配置

 

 IP 网络接口配置文件
[[email protected] ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0

 

# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
DEVICE=eth0         #网卡接口名称
TYPE=Ethernet       #网卡类型
ONBOOT=yes          #系统启动时是否自动加载
BOOTPROTO=static    #启用地址协议 --static:静态协议 --bootp协议 --dhcp协议
HWADDR=08:00:27:11:50:F5  #网卡设备MAC地址
IPADDR=10.243.118.152     #网卡IP地址
NETMASK=255.255.254.0     #网卡网络地址
GATEWAY=10.243.118.1      #网卡网关地址
BROADCAST=10.243.119.255  #网卡广播地址 
DNS1=10.243.101.62        #网卡DNS地址
DNS2=10.243.65.66

 
 
重新导入ifcfg-eth0网络配置文件
[[email protected] ~]# /etc/init.d/network reload
Shutting down interface eth0:                             [ OK ]
Shutting down loopback interface:                         [ OK ]
Bringing up loopback interface:                           [ OK ]
Bringing up interface eth0:                               [ OK ]

网卡接口关闭与**
[[email protected] ~]# ifdown eth0   #关闭网络
[[email protected] ~]# ifup eth0     #启动网络

网络服务启动与关闭
方法一:
[[email protected] ~]# service network stop    #关闭网络服务
[[email protected] ~]# service network start   #启动网络服务
[[email protected] ~]# service network restart #重启网络服务
方法二：
[[email protected] ~]# /etc/init.d/network stop
[[email protected] ~]# /etc/init.d/network start
[[email protected] ~]# /etc/init.d/network restart
网卡状态查询
[[email protected] ~]# service network status
Configured devices:
lo eth0
Currently active devices:
lo eth0

临时配置网卡信息，无需重启。
[[email protected] ~]# ifconfig eth0 10.1.1.10 netmask 255.0.0.0

查看网卡接口信息，默认列出所有接口
[[email protected] ~]# ifconfig

查看当前路由及网关信息
[[email protected] ~]# netstat -r

 

 

redhat 脚本自动切换IP设置

Attached please find the script to change your vm’s network ip, the way to use it is as below:

1.    Change to home’s network:
      ./changeNetwork.sh home
2.    Change to office’s network:
      ./changeNetwork.sh office

 

 changeNetwork.sh

 

\cp -f ifcfg-eth0-$1 /etc/sysconfig/network-scripts/ifcfg-eth0
service network restart

 

 

ifcfg-eth0-home

DEVICE=eth0
NM_CONTROLLED=yes
ONBOOT=yes
HWADDR=08:00:27:67:4D:66
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
IPADDR=192.168.1.123
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
USERCTL=no
DNS2=122.224.9.93
DNS1=8.8.8.8

 

 

ifcfg-eth0-office

DEVICE=eth0
NM_CONTROLLED=yes
ONBOOT=yes
HWADDR=08:00:27:7a:1c:cc
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
IPADDR=10.243.119.226
NETMASK=255.255.254.0
GATEWAY=10.243.119.1
USERCTL=no
DNS2=10.243.65.66
DNS1=10.243.101.62

 

 

设置暂时性的http代理 ：
export http_proxy=http://username:[email protected]:port

 

查看端口占用情况 netstat -antlp | grep 443
bin/apachectl stop
bin/apachectl start

 

查看路由状态

   tracert  192.168.67.143  4001

 

开通组播功能：

   route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0

 

 注意 :  如果提示   Error: No suitable device found:     找不到设备
 
删除 /etc/udev/rules.d/70-persistent-net.rules
重后 重新编辑使 mac 地址  及 设备名称  在两个文件中 对应