boolean expression

I‘m using tcpdump to dump, debug and monitor traffic on a network. However, there is lots of noise and I would like to exclude ssh from my dumps. How do I monitor all traffic except my ssh session?

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Q. How do I capture specific protocol or port such as 80 ( http ) using TCPDump tool under Linux / UNIX? How do I recording Traffic with TCPDump and find problems later on?

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How do I use bash while loop to repeat certain task under Linux / UNIX operating system? How do I set infinite loops using while statement?

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