On Thu, 20 Apr 2000, Minh Van wrote:
>
> i don't know how to use tee properly.
>
> some trials with 'tcpdump -i ppp0 > /dev/stdin | tee -a /tcpdump.log'
> doesn't pipe tcpdump output and log the output to tcpdump.log, even if i
> use '... /dev/stdout | tee'.
Think about the above command for a moment....
You're asking it to redirect standard output to a file AND redirect
standard output to a program. The first one wins.
You're also asking it to redirect standard output to /dev/stdin which
is a little silly.
What you want is this
tcpdump -i ppp0 | tee -a /tcpdump.log
This will show you the output on the screen AND save it in the file
/tcpdump.log
Regards
Peter
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