[CentOS] How to measure file transfer speed?

hadi motamedi wrote:
> Dear All
> I have one centos server equipped with WiFi . I want to measure data 
> rate speed on this connection . Is there any utility on my centos that 
> can measure data speed on one specific Ethernet connection when 
> transferring large size files through WiFi connection?

transfer a file, time it, divide file size in megabytes / seconds to get 
MB/sec speeds.  multiply by 8 or 10 to get approximate backbone speed in 
megabit/sec. (10 approximates protocol overhead)