rskelley9’s gists

rskelley9 / command.txt

Last active November 8, 2015 07:47

Count the Number of Hosts on Your LAN

	List the hosts on your LAN, their MAC addresses and IP's and then count them:

	```
	$ arp -an \| tee >(wc -l)
	```

rskelley9 / callapi.sh

Last active August 3, 2017 16:31

Shell script for calling api

	if ! type "$brew" > /dev/null; then
	echo "homebrew is not installed, please install homebrew"
	else
	if ! type "$curl" > /dev/null; then
	echo "curl is not installed, please install homebrew"
	else
	if ! type "$jq" > /dev/null; then
	echo "jq is not installed, please install homebrew"
	else
	if [ -z "$2" ]; then

rskelley9 / commands.md

Created December 16, 2015 05:20

Some useful net related aliases from my zshrc.

Aliases

# Get local computer IP address for LAN network
alias myip="ifconfig | sed -En 's/127.0.0.1//;s/.*inet (addr:)?(([0-9]*\.){3}[0-9]*).*/\2/p'"

# Public facing ip
alias myippub='wget -qO- icanhazip.com'

# Get mac address for en0

rskelley9 / scanner.sh

Created December 22, 2015 07:37

Scan for other computers on LAN

	echo -e "\nScan LAN for other computers.\n"
	if [ -n ""$@"" ]; then
	ip=$(/sbin/ifconfig $1 \| grep 'inet ' \| awk '{ print $2}' \| cut -d"." -f1,2,3 )
	nmap -sP $ip.1-255
	else
	echo "Enter Interface parameter ex:"
	echo -e "\t./scannetwork.sh $(ifconfig -lu \| awk '{print $2}')\n"

	echo "Available interfaces: "
	for i in $(ifconfig -lu)

rskelley9 / application_controller.rb

Last active October 31, 2016 05:43

How I remedied duplicate form submissions: https://www.tumblr.com/blog/ryankelley

	class ApplicationController < ActionController::Base …

	private

	def client_will_not_cache_response
	response.headers["Cache-Control”] = “no-cache, no-store”
	response.headers[“Pragma”] = “no-cache”
	response.headers[“Expires”] = “Fri, 01 Jan 1990 00:00:00 GMT”
	end
	end

rskelley9 / application_controller.rb

Last active October 31, 2016 05:02

How I remedied duplicate form submissions via preventing cache, and preventing duplicate data save in database in controller layer.

	class ApplicationController < ActionController::Base
	prepend_before_filter :authenticate_user!
	private

	## Tell client not to cache the response
	def client_will_not_cache_response
	response.headers["Cache-Control”] = “no-cache, no-store”
	response.headers[“Pragma”] = “no-cache”
	response.headers[“Expires”] = “Fri, 01 Jan 1990 00:00:00 GMT”
	end

rskelley9 / sql_injection_examples.rb

Created March 21, 2017 05:11

Some Examples of SQL Injection in Rails

	params = {}
	## Using string interpolation in where clauses is always dangerous

	## BAD (Strings unescaped)
	params[:firstname] = "'cat' OR lastname='Kelley'"
	User.find(:first, conditions: "firstname = #{params[:firstname]}")
	#=> AR Relation matching conditions

	## GOOD (Escaped/Parameterized via Hash or Array)
	User.find(:first, conditions: {firstname: params[:firstname]})

rskelley9 / rm_ds_store.sh

Created October 1, 2017 05:14

I created this script to remove the hidden .DS_Store file from my projects and automatically initialize and update my .gitignore file to keep it untracked.

	#!/bin/sh

	if [ -f "`find . -name .DS_Store`" ] ; then
	if [ ! -f "`git rev-parse --is-inside-work-tree`" ] ; then
	echo "no git repository found"

	while true; do
	read -p "Do you wish to initialize git repository in this folder $(echo $(pwd))?" yn

	case $yn in

rskelley9 / whats_my_os.sh

Created October 1, 2017 05:40

Reveals type of operating system shell is running in a simple format useful for logic in other scripts.

	#!/bin/sh

	case "$(uname -s)" in
	Linux*) sys=Linux;;
	Darwin*) sys=Mac;;
	CYGWIN*) sys=Cygwin;;
	MINGW*) sys=MinGw;;
	*) sys="UNKNOWN:$(uname -s)"
	esac
	echo ${sys}

rskelley9 / install_imagemagick.sh

Created October 1, 2017 05:43

Install imagemagick, dependencies using homebrew automatedly.

	#!/bin/sh

	if [ ! -f "`which brew`" ] ; then
	echo "installing homebrew"
	ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
	else
	brew update
	fi

	if brew ls --versions imagemagick > /dev/null; then

Ryan Kelley rskelley9

Aliases