Node hardware information script

[Mike Pontillo]

FYI,

   I recently found myself in need of an easy way to dump all the relevant
information about a machine to be used with MAAS, such as:

 - PCI device information
 - USB device information
 - modaliases (to correlate with the above!)
 - Serial ports
 - Network interfaces
 - Block devices (summary and details)
 - DMI data (including full dump)

   Basically most of the things that MAAS gathers when it commissions, plus
a little extra to make it more understandable to a human... and all in one
place.

   I've written a script[1] to summarize all those details, and added a
redirect from goo.gl so it can be run with a simple copy/paste[2] (such as
after using the "Allow SSH access and prevent machine from powering off"
option and SSHing into a commissioning node). Something like this may be
helpful not only for future development, but as something to include when
asking for support (or filing a bug) with nodes that aren't commissioning
or deploying properly.

   I thought I'd send this out in case it helps someone else; feel free to
fork this and improve it!

Regards,
Mike

[1]:
https://gist.github.com/mpontillo/ecc30011d6d5889fda23c8e5e3545105

[2] Short, copy/paste version:
curl -fsSL https://goo.gl/ixXc4z | sudo bash

(drop the "sudo" and/or the pipe to bash if you don't trust me!) ;-)
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