Re: tcpdump output not redirecting to file

[Guy Harris <guy () alum mit edu>]

Latha G wrote:

> I am using tcpdump. As I want to capture the tcpdump output ,
> I am using            tcpdump -c 1 > filedump
> It is finely working.
> But unfortunately now it is not working. Even  -w option also not working.
> I mean the expected ouput file doesn't contains the output, it was just
> empty. But the file was created.

What happens if you run

        tcpdump -c 1

without redirecting the output?  If you don't get any output, the 
problem is that, for whatever reason, no packets are being captured on 
the network interface on which you're capturing.
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