How to use the shell to limit the network bandwidth of a specified user shell program

In operation, you will encounter network bandwidth problems that need to limit the use of your shell applications (such as wget, Crul, FTP, SFTP, etc.) to connect to the Internet. How to set the network bandwidth without using complex firewall rules?

Tool trickle can implement this function,

System Debian/ubuntu Linux using the Apt-get method can be installed

$ sudo apt-get install trickle

System Centos/rhel/fedora Linux Installation

1. Install Epel Source Address http://www.cyberciti.biz/faq/fedora-sl-centos-redhat6-enable-epel-repo/

2. Installation # Yum Install trickle

How to use

Trickle-u uploadlimit Program
trickle-d downloadlimit program
{upload_limit}{ Download_limit} program-binary

For example limit FTP upload download speed trickle-u 100-d FTP

Limit wget download speed trickle-d wget http://ftp.openbsd.org/pub/OpenBSD/5.2/i386/install52.iso

Limit bandwidth methods for all shell programs trickle-d 500-u either bash or trickle-d 500-u ksh

Trickle method of parameter usage

-H Help (this)
-V Increase verbosity level
-V Print Trickle version
-S Run Trickle in standalone mode independent of trickled
-D Set Maximum cumulative download rate to KB/S
-U Set maximum cumulative upload rate to kb/s
-W Set window length to KB
-T Set default smoothing time to S
-L Set Default smoothing length to KB
-N Use trickled socket name
-L Set Latency to milliseconds