Linux Ubuntu下IP的查看和修改

Linux Ubuntu下IP的查看和修改

 

>>查看IP.

>ifconfig -a
eth0      Link encap:Ethernet  HWaddr 08:00:27:a8:00:8c  
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fea8:8c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:175 errors:0 dropped:0 overruns:0 frame:0
          TX packets:205 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:33452 (33.4 KB)  TX bytes:32915 (32.9 KB)

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:65536  Metric:1
          RX packets:155 errors:0 dropped:0 overruns:0 frame:0
          TX packets:155 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:11533 (11.5 KB)  TX bytes:11533 (11.5 KB)

>>修改IP.

a,在root用户下使用ifconfig命令

>ifconfig eth0 192.168.87.223 netmask 255.255.255.0
>ifconfig eth0 up

b.1,在root用户下修改文件/etc/syssconfig/network-scripts/ifcfg-eth0.

>gedit /etc/sysconfig/network-script/ifcfg-eth0

b.2.1.1修改其中的IPADDR.

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.87.222
NETMASK=255.255.255.0
GATEWAY=192.168.87.1
HWADDR=00:0c:29:dd:a6:00

b.2.1.2使用命令重启网络服务

>service network restart
或者
service network start

b.2.2.1如果使用动态IP则将static改为dhcp,将IPADDR,NETMASK,GATEWAY三个注释,将ONBOOT=yes改为ONBOOT=no,如下:

DEVICE=eth0
ONBOOT=no
BOOTPROTO=dhcp
#IPADDR=192.168.87.222
#NETMASK=255.255.255.0
#GATEWAY=192.168.87.1
HWADDR=00:0c:29:dd:a6:00

b.2.2.2使用命令获取IP地址,然后可以使用ifconfig再次查看新获取的IP地址.

dhclient eth0