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(Assuming a Debian 8-like system)

Install prometheus-node-exporter

$ sudo apt update && sudo apt install prometheus-node-exporter

Configure prometheus-node-exporter to expose metrics only to localhost, not on to all networks. Modify file /etc/default/prometheus-node-exporter:
```
# Set the command-line arguments to pass to the server.
```

Prevent DNS leaks on macOS by using dnscrypt-proxy. dnscrypt-proxy is available for installation via Homebrew, and comes configured to use OpenDNS servers. After installing, dnscrypt-proxy will always run in the background and encrypt all your DNS queries:

Open Terminal.app (press Command+Space and type terminal and hit return).
Run in Terminal app: /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" and press enter/return key. Wait for the command to finish.
Run in Terminal app: brew install dnscrypt-proxy and press enter/return key. Wait for the command to finish.
Run a DNS leak test: click the Standard test and ensure all DNS servers are owned by opendns.com.

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

	#deb cdrom:[Ubuntu 20.04.2.0 LTS _Focal Fossa_ - Release amd64 (20210209.1)]/ focal main restricted

	# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
	# newer versions of the distribution.
	deb http://br.archive.ubuntu.com/ubuntu/ focal main restricted
	# deb-src http://br.archive.ubuntu.com/ubuntu/ focal main restricted

	## Major bug fix updates produced after the final release of the
	## distribution.
	deb http://br.archive.ubuntu.com/ubuntu/ focal-updates main restricted

	upstream @prometheus {
	server MY_IP:9090;
	}

	upstream @alertmanager {
	server MY_IP:9093;
	}

	server {
	listen 80;

	KEY=XXXXXXXXXXXX
	HOST="https://metrics.crisidev.org"

	mkdir -p dashboards && for dash in $(curl -k -H "Authorization: Bearer $KEY" $HOST/api/search\?query\=\& \|tr ']' '\n' \|cut -d "," -f 5 \|grep slug \|cut -d\" -f 4); do
	curl -k -H "Authorization: Bearer $KEY" $HOST/api/dashboards/db/$dash > dashboards/$dash.json
	done

	docker run \
	--name {{printf "%q" .Name}} \
	{{- with .HostConfig}}
	{{- if .Privileged}}
	--privileged \
	{{- end}}
	{{- if .AutoRemove}}
	--rm \
	{{- end}}
	{{- if .Runtime}}

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>a-domain</title>
	</head>
	<body>
	<h1>跨域通信机制 - postMessage</h1>
	<h2>a-domian.html</h2>
	<iframe class="js-iframe" src="http://localhost:3000/other-domain.html"></iframe>