linux下监控进程对带宽的占用

应用场景描述:

       如果你发现网络较慢, 经查是出口带宽流量较大, 继续查是网内某台linux服务器的对外流量比较大, 然后采取措施, 对该linux服务器限速或者暂时性关闭网络. 但问题是, 这台服务器怎么了? 是中毒了, 还是用户访问量过大? 等你限速后, 再到服务器上查询原因, 基本上是查不到了, 各个进程占用率都正常了, 无法看到故障时的状态. 换句话说, 你无法通过本次故障, 避免同类故障再次发生.

      那么新的需求就是, 作为管理员, 你要知道这台linux服务器上哪个进程占用了你大量带宽? 找到他, 才能明确知道是中毒,还是业务访问过大.

      应用场景描述完了, 该解决问题了, 答案是nethogs

       nethogs 可以查看当前linux系统中哪个进程占用了多少带宽?

       具体步骤:

       1. 安装epel yum源

       方法: 安装 epel-release-6-8.noarch.rpm(针对centOS6.*)

       rpm -Uvh

      或者 从下面的链接下载

     

                安装 epel-release-5-4.noarch.rpm (针对centOS5.4)

       rpm -Uvh

或者从下面的链接下载

 

       安装后, 在/etc/yum.repos.d/下会出现两个YUM配置文件

       epel.repo, epel-testing.repo

[root@master yum.repos.d]# cat epel.repo

[epel]

name=Extra Packages for Enterprise Linux 6 - $basearch

#baseurl=

mirrorlist=

failovermethod=priority

enabled=1

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

[epel-debuginfo]

name=Extra Packages for Enterprise Linux 6 - $basearch - Debug

#baseurl=/debug

mirrorlist=

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

gpgcheck=1

[epel-source]

name=Extra Packages for Enterprise Linux 6 - $basearch - Source

#baseurl=

mirrorlist=

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

gpgcheck=1

2. 安装nethogs包

       [root@master ~]# yum install nethogs -y

Loaded plugins: fastestmirror, refresh-packagekit, security

Loading mirror speeds from cached hostfile

 * c6-media:

 * epel: mirrors.yun-idc.com

Setting up Install Process

Resolving Dependencies

--> Running transaction check

---> Package nethogs.x86_64 0:0.8.0-1.el6 will be installed

--> Finished Dependency Resolution

Dependencies Resolved

===============================================================================

 Package               Arch                 Version                    Repository          Size

===============================================================================

Installing:

 nethogs               x86_64               0.8.0-1.el6                epel                28 k

Transaction Summary

===============================================================================

Install       1 Package(s)

Total download size: 28 k

Installed size: 53 k

Downloading Packages:

nethogs-0.8.0-1.el6.x86_64.rpm                                           |  28 kB     00:00    

Running rpm_check_debug

Running Transaction Test

Transaction Test Succeeded

Running Transaction

  Installing : nethogs-0.8.0-1.el6.x86_64                                                   1/1

  Verifying  : nethogs-0.8.0-1.el6.x86_64                                                   1/1

Installed:

  nethogs.x86_64 0:0.8.0-1.el6                                                                 

Complete!

3. 使用nethogs 查看哪些linux进程占用带宽

[root@master yum.repos.d]# nethogs -p eth0