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Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger

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#!/bin/bash
# Rename all *.txt to *.text
for f in *.txt; do 
    mv -- "$f" "${f%.txt}.text"
done

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#!/bin/bash
chmod 0644 ~/.ssh/id_rsa.pub
chmod 0600 ~/.ssh/id_rsa

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#!/bin/bash

# Install reflector
sudo pacman -S reflector

# Update mirrorlist
reflector | sudo tee /etc/pacman.d/mirrorlist

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import time, sys

start = time.clock()

for x in range(1000):

    pass

end = time.clock()

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Clone your fork and cd into it

git clone https://github.com/yourname/repo.git
cd yourname/repo

Add upstream remote

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# With start time and duration
ffmpeg -ss $START -i $INFILE -c copy -map 0 -t $DURATION $OUTFILE

# With start time and end time
ffmpeg -ss $START -i $INFILE -c copy -map 0 -to $END $OUTFILE

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# Quick Substitution
^string1^string2

# Global Substitution
!!:gs/string1/string2

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Example attack scenario

Create a fake "viral" page with cute cat pictures, jokes or whatever, get it shared on Facebook (which is known for opening links via _blank). Create a "phishing" website at https://fakewebsite/facebook.com/page.html for example Put this code on your "viral" page window.opener.location = 'https://fakewebsite/facebook.com/page.html'; which redirects the Facebook tab to your phishing page, asking the user to re-enter her Facebook password.

How to fix

Add this to your outgoing links.

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window.onerror = function(msg, _path, line, column, error) {
  fetch('/errors', {
    error: error ? error.stack : '',
    column: column,
    line: line,
    msg: msg
  })
  return false
}