Sniffer Package on MacOS

sniff package

$ sudo tcpdump -i en0 -s 0 -B 524288 -w ~/Desktop/local.pcap

parse package

$ tcpdump -s 0 -n -e -XX -vvv -r ~/Desktop/local.pcap

GIT create new branch

If you like the method in the link you've posted, have a look at Git Flow.

It's a set of scripts he created for that workflow.

But to answer your question:

$ git checkout -b myFeature dev

Creates MyFeature branch off dev. Do your work and then

$ git commit -am "Your message"

Now merge your changes to dev without a fast-forward

$ git checkout dev
$ git merge --no-ff myFeature

Now push changes to the server

$ git push origin dev
$ git push origin myFeature

Refs http://stackoverflow.com/questions/4470523/git-create-a-branch-from-another-branch