查看自己的ip信息：

[root@slave5 conf]# ifconfig eth0 Link encap:Ethernet HWaddr E0:CB:4E:D0:EC:B2 inet addr:192.168.30.149 Bcast:192.168.30.255 Mask:255.255.255.0 inet6 addr: fe80::e2cb:4eff:fed0:ecb2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:48458926 errors:0 dropped:0 overruns:0 frame:0 TX packets:40842760 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1562626110 (1.4 GiB) TX bytes:330009772 (314.7 MiB) Interrupt:233 Base address:0xe000 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:25711326 errors:0 dropped:0 overruns:0 frame:0 TX packets:25711326 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2575592225 (2.3 GiB) TX bytes:2575592225 (2.3 GiB)

eth0和本地回環設備lo，127.0.0.1，通常被稱為本地回環地址(Loop back address)，不屬于任何一個有類別地址類。它代表設備的本地虛擬接口，所以默認被看作是永遠不會宕掉的接口。在windows操作系統中也有相似的定義，所以通常在不安裝網卡前就可以ping通這個本地回環地址。一般都會用來檢查本地網絡協議、基本數據接口等是否正常的。

在基礎上增加一個ip別名

[root@slave5 conf]# ifconfig eth0:1 192.168.30.121 broadcast 192.168.30.255 netmask 255.255.255.0 up [root@slave5 conf]# route add -host 192.168.30.121 dev eth0:1

查看ifconfig

[root@slave5 conf]# ifconfig eth0 Link encap:Ethernet HWaddr E0:CB:4E:D0:EC:B2 inet addr:192.168.30.149 Bcast:192.168.30.255 Mask:255.255.255.0 inet6 addr: fe80::e2cb:4eff:fed0:ecb2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:48460536 errors:0 dropped:0 overruns:0 frame:0 TX packets:40843834 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1562794737 (1.4 GiB) TX bytes:330131620 (314.8 MiB) Interrupt:233 Base address:0xe000 eth0:1 Link encap:Ethernet HWaddr E0:CB:4E:D0:EC:B2 inet addr:192.168.30.121 Bcast:192.168.30.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:233 Base address:0xe000 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:25711330 errors:0 dropped:0 overruns:0 frame:0 TX packets:25711330 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2575592673 (2.3 GiB) TX bytes:2575592673 (2.3 GiB)

用另外一臺主機，如果能平通說明成功。

[root@slave5 ~]# ping 192.168.30.123 PING 192.168.30.123 (192.168.30.123) 56(84) bytes of data. 64 bytes from 192.168.30.123: icmp_seq=1 ttl=64 time=0.018 ms 64 bytes from 192.168.30.123: icmp_seq=2 ttl=64 time=0.011 ms 64 bytes from 192.168.30.123: icmp_seq=3 ttl=64 time=0.009 ms 64 bytes from 192.168.30.123: icmp_seq=4 ttl=64 time=0.008 ms

要注意的是，上述配置信息重啟后會消失，如何配置不消失信息。如下

將ifconfig和rout命令添加到/etc/rc.local文件中
?

vi /etc/rc.local

在文件末尾叫上如下內容：

[root@slave5 conf]# ifconfig eth0:1 192.168.30.121 broadcast 192.168.30.255 netmask 255.255.255.0 up [root@slave5 conf]# route add -host 192.168.30.121 dev eth0:1

?

總結

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