He wants 10 files with size 1M, not 10 packages. The parameter -C has a unit of 1,000,000 bytes.

tcpdump seems to have no principal problem with running in the background, just checked it on the command line. It may need some io redirection if called from a script. But it should have at least a '&' at the end to go into the background.

In reply to Re^2: kill process when files created... by jethro
in thread kill process when files created... by onlineperluser

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