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Break a 140MB file to smaller files

asked 2020-01-03 18:51:06 +0000

jj gravatar image

I have a 140MB trace file and I'd like to break it down to several 30Mb file so I can attached to my email. How do I do that? Thx

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answered 2020-02-02 22:47:13 +0000

kaos gravatar image

even 30MB would be too much for most users because the binary files are being transfered using Base64 encoding which will make your 30MB file like 40MB+ mail - an easy way to fill up user's quota.

Use dropbox/wetransfer etc instead - your recipient will thank you for saving time by avoiding mergecap'ing

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answered 2020-01-03 20:00:46 +0000

Bob Jones gravatar image

This discussion has some different ways:

https://serverfault.com/questions/131872/how-to-split-a-pcap-file-into-a-set-of-smaller-ones

Everyone has their preference, but I prefer:

tcpdump -r old_file -w new_files -C 10

Where C is in MB. Another good discussion on the topic using editcap:

https://blog.packet-foo.com/2018/07/pcap-split-and-merge/

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Asked: 2020-01-03 18:51:06 +0000

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Last updated: Feb 02 '20