Linux System View network card real-time traffic (nload ifstat iftop) command detailed

Iftop command

Installation

The code is as follows	Copy Code
[Root@test iftop-0.9]# make [Root@test iftop-0.9]# make install [Root@test iftop-0.9]# Iftop

Instance

The default is to monitor the traffic of the first network card

Iftop

Monitoring eth1

Iftop-i eth1

Direct IP display without DNS reverse resolution

Iftop-n

Display the port number directly and do not display the service name:

Iftop-n

Show the packet flow in and out of a network segment

Iftop-f 192.168.1.0/24 or 192.168.1.0/255.255.255.0

nload command

Load is currently only compiled and installed based on the source code. CentOS installed by default, you may need to install a few required packages when you compile the installation nload: GCC, gcc-c++, and Ncurses-devel

The code is as follows	Copy Code
Yum Install gcc gcc-c++ ncurses-devel wget http://www.roland-riegel.de/nload/nload-0.7.4.tar.gz Tar xvf nload-0.7.4.tar.gz CD nload-0.7.4 ./configure Make Make install

Upon completion, Nload was installed in the/usr/local/bin/nload.

To view real-time traffic in a graphical manner:

Nload-t 200-i 1024-o 128-u H

Check the flow of the first network card, showing the real-time flow chart

Nload eth0

View the traffic of multiple network adapters at the same time.

Nload-m

Ifstat command

Installation

The code is as follows	Copy Code
[Root@test ifstat-1.1]#./configure [Root@test ifstat-1.1]# make [Root@test ifstat-1.1]# make install

Default use

#ifstat
Eth0 eth1
KB/S in kb/s out kb/s in kb/s out
0.07 0.20 0.00 0.00
0.07 0.15 0.58 0.00

The default ifstat does not monitor the loopback interface, which shows the unit of traffic is KB.

Monitor all network interfaces

# ifstat-a
Lo eth0 eth1
KB/S in kb/s out kb/s in kb/s out kb/s on kb/s out
0.00 0.00 0.28 0.58 0.06 0.06
0.00 0.00 1.41 1.13 0.00 0.00
0.61 0.61 0.26 0.23 0.00 0.00

Ifstat relatively simple to see network traffic profile.

Summarize

Nload:

Network Card Real-time traffic tool (this need to install the system by default no belt.)

Ifstat:

Tool is a network interface monitoring tool, relatively simple to see network traffic

Iftop:

is a real-time flow monitoring tool, monitoring TCP/IP connection, the disadvantage is no report function. Must be run as root.