mcastelino

The netfilter hooks in the kernel and where they hook in the packet flow

The figure below calls out

• The netfilter hooks
• The order of table traversal

kevin-smets

Get started

Install virtualbox and the extension pack:

brew install --cask docker virtualbox virtualbox-extension-pack

Download the ubuntu server image and create a VBox for it, the rest of the readme assumes it is named "Ubuntu Server".

Enable SSH

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

rxaviers

People

:bowtie:	😄 :smile:	😆 :laughing:
😊 :blush:	😃 :smiley:	☺️ :relaxed:
😏 :smirk:	😍 :heart_eyes:	😘 :kissing_heart:
😚 :kissing_closed_eyes:	😳 :flushed:	😌 :relieved:
😆 :satisfied:	😁 :grin:	😉 :wink:
😜 :stuck_out_tongue_winking_eye:	😝 :stuck_out_tongue_closed_eyes:	😀 :grinning:
😗 :kissing:	😙 :kissing_smiling_eyes:	😛 :stuck_out_tongue:

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

gouvermxt

#------------------------------------------------------------------------------
# Rotinas para verificação de CPF e CNPJ
# Linguagem: Ruby
# Escrito por: André Camargo < [email protected] > http://blog.boaideia.inf.br
# Use, copie, melhore a vontade! Patches são bem-vindos...
#------------------------------------------------------------------------------
def check_cpf(cpf=nil)
  return false if cpf.nil?

  nulos = %w{12345678909 11111111111 22222222222 33333333333 44444444444 55555555555 66666666666 77777777777 88888888888 99999999999 00000000000}