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DNS:

IPv4 Addr	IPv6 Addr	ASn	Political Region	Loc	Svc	Org
8.8.8.8	2001:4860:4860::8888	AS15169	US	Worldwide (Anycast)	Google Public DNS	Google
8.8.4.4	2001:4860:4860::8844	AS15169	US	Worldwide (Anycast)	Google Public DNS	Google
1.1.1.1	2606:4700:4700::1111	AS13335	US	Worldwide (Anycast)	Cloudflare-DNS	Cloudflare/APNIC
1.0.0.1	2606:4700:4700::1001	AS13335	US	Worldwide (Anycast)	Cloudflare-DNS	Cloudflare/APNIC
208.67.222.222	2620:119:35::35	AS36692	US	*W

Setting up ssh public key authentication on macOS using a YubiKey 4

I largely followed Florin's blog post, but have a few notes to add regarding issues I encountered:

Basic setup notes

I used a YubiKey 4, while the blog describes using a YubiKey NEO. I'm sure a YubiKey 5 would also work. I'm also running macOS 10.13.6.
I installed GPGTools as recommended. However, as I'll note later, it seems that gpg-agent only automatically starts when gpg is used; for ssh, you'll need to ensure it's running.
Before generating your keys, decide what key size you want to use. If you run the list command inside gpg --edit-card, look for the Key attributes line to see what is currently selected. On my YubiKey 4, it defaulted to 2048 bits for all keys:

Key attributes ...: rsa2048 rsa2048 rsa2048

Connecting to serial port (com port) over network

(Serial port or com port? - Serial ports are often refered as COM ports. It is the same to be short. You can read abut it in the Wiki article )

The problem
The solution in theory
WINDOWS
- Server
- Client

Driver Signature

Setup a Local Only SMTP Email Server (Linux, Unix, Mac)

1 - Point localhost.com to your machine

Most of programs will not accept an email using just @localhost as domain. So, edit /etc/hosts file to make the domain localhost.com point to your machine, including this content to the file:

127.0.0.1 localhost.com

2 - Install Postfix

IRC Reference

Not intended as a guide for newbies, more like a "cheat sheet" for the somewhat experienced IRC user, especially one who wields some power over a channel.

The Basics

/join #channel
- Joins the specified channel.
/part #channel
Leaves the specified channel.

Docker Macvlan and Ipvlan Experimental Driver Examples

The build will be vendored into github.com/docker/docker in the next few days. In the meantime here is the binary that will be getting vendored. docker-1.11.0-dev.zip
Ipvlan L2 mode network with multiple subnets without a parent specified
For a long test that will create 54 networks and 120+ containers, then delete them all and recreate them again try ipvlan-macvlan-it.sh Instructions here Docker Macvlan and Ipvlan Manual IT Test
FYI Note: When the parent is empty or the --internal flag is used, a linux type dummy interface is dynamically created by Libnetwork to act as the parent. This network is completely isolated and is the equivalent to a --internal flag. This is a good mode for demoing.
The first test requires an interface

	{
	"window:devtools": "command+alt+i",
	"window:reload": "command+r",
	"window:reloadFull": "command+shift+r",
	"window:preferences": "command+,",
	"zoom:reset": "command+0",
	"zoom:in": "command+plus",
	"zoom:out": "command+-",
	"window:new": "command+n",
	"window:minimize": "command+m",

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	[Trigger]

	Operation = Install
	Operation = Upgrade
	Operation = Remove
	Type = Package
	Target = *

	[Action]

	[Trigger]
	Operation = Install
	Operation = Upgrade
	Operation = Remove
	Type = Package
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	[Action]
	Description = Searching for orphaned packages...
	When = PostTransaction