使用iptraf进行实时监控流量
下载源码安装关联关系太多了（有时候操作系统安装的不是很完全的话，源码安装会有问题），还是用yum方式这样方便(适用于liunx内核)，首先用它查看下iptraf依赖关系。
[root@slave1 conf]# yum search iptraf
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* rpmforge: mirror-fpt-telecom.fpt.net
==================================================================================== Matched: iptraf =====================================================================================
iptraf.x86_64 : A console-based network monitoring utility.
[root@slave1 conf]#
说明iptraf存在
运行安装命令yum install iptraf
[root@slave3 ~]# yum install iptraf
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package iptraf.x86_64 0:3.0.1-14.el6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
==========================================================================================================================================================================================
Package Arch Version Repository Size
==========================================================================================================================================================================================
Installing:
iptraf x86_64 3.0.1-14.el6 base 316 k
Transaction Summary
==========================================================================================================================================================================================
Install 1 Package(s)
Total download size: 316 k
Installed size: 681 k
Is this ok [y/N]: y
Downloading Packages:
iptraf-3.0.1-14.el6.x86_64.rpm | 316 kB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : iptraf-3.0.1-14.el6.x86_64 1/1
Verifying : iptraf-3.0.1-14.el6.x86_64 1/1
Installed:
iptraf.x86_64 0:3.0.1-14.el6
Complete!
以上就算完成成功，但有时候不会安装成功，就要查下问题了。有时候不成功是有以下信息：
Total download size: 329 k
Is this ok [y/N]: y
Downloading Packages:
http://mirrors.ustc.edu.cn/centos/5/os/x86_64/CentOS/iptraf-3.0.0-5.el5.x86_64.rpm: [Errno 4] IOError: <urlopen error (101, 'Network is unreachable')>
Trying other mirror.
Error Downloading Packages:
iptraf-3.0.0-5.el5.x86_64: failure: CentOS/iptraf-3.0.0-5.el5.x86_64.rpm from a: [Errno 256] No more mirrors to try.
报此错误，检查下机器是否能链接外网。