Where is wrong with tcpdump?

[Paul A. Procacci]

EdwardKing wrote:
> I want to watch ip:172.0.10.2 port:19 TCP information,so I use following command:
> #tcpdump tcp port 19 host 172.0.10.2
> tcpdump: syntax error
>
> Why? How to do it?
>
> Thanks
>
>
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tcpdump tcp port 19 and host 172.0.10.2

Works here; P