CentOS6.5: monitor bandwidth with vnstat

# cat /etc/centos-release ;uname -ri CentOS release 6.5 (Final) 2.6.32-431.3.1.el6.x86_64 x86_64

Add epel repo

# cat /etc/yum.repos.d/epel.repo [epel] name=Extra Packages for Enterprise Linux 6 - $basearch #baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch 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 - $basearch - Debug #baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debug mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-6&arch=$basearch 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 - $basearch - Source #baseurl=http://download.fedoraproject.org/pub/epel/6/SRPMS mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-6&arch=$basearch failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 gpgcheck=1

Install vnstat via yum

# yum update -y # yum install vnstat –y

config file

# less /etc/vnstat.conf # vnStat 1.11 config file ## # default interface #Interface "eth0" Interface "br0" # location of the database directory DatabaseDir "/var/lib/vnstat"

run vnstat as daemon.

# /etc/init.d/vnstat start vnstatd を起動中:                                          [  OK  ]

# vnstat Database updated: Tue Jan 14 15:33:21 2014   br0 since 01/14/14          rx:  10.46 MiB      tx:  14.21 MiB      total:  24.67 MiB   monthly                     rx      |     tx      |    total    |   avg. rate     ------------------------+-------------+-------------+---------------       Jan '14     10.46 MiB |   14.21 MiB |   24.67 MiB |    0.17 kbit/s     ------------------------+-------------+-------------+---------------     estimated        22 MiB |      31 MiB |      53 MiB |   daily                     rx      |     tx      |    total    |   avg. rate     ------------------------+-------------+-------------+---------------         today     10.46 MiB |   14.21 MiB |   24.67 MiB |    3.61 kbit/s     ------------------------+-------------+-------------+---------------     estimated        15 MiB |      21 MiB |      36 MiB |

dump bandwidth as graph

# vnstati -i br0 -vs -o hourly.png

It seems that vnstat can not output bandwidth consumption per port or IP addresses.

Anyway, this tool is easy to use to monitor total bandwidth.