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Don't worry. The next step is not for tomorrow too. Please take your time (and let me know if you need anything).

OK, I've installed successfully Delphes and PAM.

It didn't work initially. After digging I was missing some packages on Ubuntu 17.10: libtbb-dev, libtiff-dev, libjpeg-dev and tclsh

I guess we should familiarize ourself with the root primer document?

Knowledge of the root software is not necessary. This is a requirement to run the LHC detector simulator that is integrated to the package (i.e. Delphes).

If you want to get familiarized with the platform, I can recommend this page that should be updated one day... However, the available material is still ok as a starter ;)