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python requests

• get request example:

  r = requests.get("url", params={}, auth=(username, password))

• dir(r) to get response object attributes.

• post request example:

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# This is a single line comment.

=begin
	This is a multiline comment.
=end

x = 10

print "#{x}\n"

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• Chef provides a Domain Specific Language (DSL) for specifying Infrastrcture as a Code and the automation necessary to deploy, configure, and manage servers based on that code.
• Allowing the specification of what the final configuration should be and not the steps necessary to make that happen.
• Multiparts: ChefDK (Development Kit), Chef Server and Chef Client.
• Desired State Configuration:
  • Specify a server configuration's end result, not the steps to go there.
  • "Test and Repair" approach allows chef to only make changes necessary to get the server back to the desired state configuration.
  • If server is already in desired state, no changes will occur.
• Two ways of applying configuration (Imperative & Declarative style)
  • Imperative Approach (This applies to an single entity and it's gonna differ based on entities)

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• Node - a physical or virtual machine that hosts services
  • Nodes also referred to as members.
  • Examples
    • Your computer
    • An AWS EC2 instance
    • A bare metal machine in your private data center
• Service - executing software that provides utility via an interface
  • Typically long-lived process listening on a port(s)
  • Examples
• A web server (nginx, apache, iis)

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• curl -s -o /dev/null -w "%{http_code}" https://www.yahoo.com to print only the http status code.
• curl -s -D - -o /dev/null https://www.yahoo.com to print only the response headers.
  • -D - dump headers to stdout indicated by -
  • -o /dev/null send output (HTML) to /dev/null essentially ignoring it
• https://everything.curl.dev/usingcurl/verbose/writeout
• https://codeahoy.com/general/curl-display-request-response-headers

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Algorithm Types

Encryption Algorithms       (AES, DES, RSA...)
Authentication Algorithms   (MD5, SHA-256, SHA-512, HMAC ...)

Security

Encryption Types:
Symmentric      Single key (K) will be used for Encryption and Decryption (AES, DES)

Asymmentric Two keys (KU, KR) will be used for Encryption and Decryption (RSA)