Eric Walker ewalk153

ewalk153 / bash.sh

Last active December 26, 2015 17:39

simplest web server testing

while true ; do nc -l 8080 < index.html ; done

ewalk153 / search_port.bash

Created October 7, 2013 10:08

find a machine with a given port open

for i in {10..254}; do nc -v -n -z -w 1 192.168.36.$i 8000; done

ewalk153 / remove_rails_rc1.sh

Last active December 24, 2015 09:18

Remove all gems matching a certain version number with a shell script

	# simple bash script that unstalls a version of rails (this could break if you have other gems matching the exact version name)
	# here we remove rails 4.0.0.rc1
	# v1, simple
	#gem list \| grep 4.0.0.rc1 \| awk -F= 'BEGIN {FS = " "} ; {print $1}' \| while read x ; do gem uninstall $x -v 4.0.0.rc1 ; done

	# v2, even shorter, no need for awk
	gem list \| grep 4.0.0.rc1 \| while read name _; do gem uninstall $name -v 4.0.0.rc1 ; done

ewalk153 / des3.rb

Created September 17, 2013 16:07

Basic example script for encrypting/decrypting with 3DES.

	require 'openssl'
	require 'base64'


	# Generate with this: OpenSSL::Cipher::Cipher.new("des-ede-cbc").tap{\|c\| c.encrypt}.random_key
	key = "\xBEB\xBA;\xA5\xEA-\x1A4\x0E8\xAC\x13\xF1s9\xB2\x87\xD3D\x9A\xC2\xA8\xC7"

	def encrypt(message, key)
	des_cbc=OpenSSL::Cipher::Cipher.new("des-ede-cbc")
	des_cbc.encrypt

ewalk153 / phones.rb

Created September 13, 2013 09:20

Format and standardize parsing of phone numbers in our projects with this

	def parse_phone(string)
	(Phoner::Phone.parse(string) \|\| Phoner::Phone.parse('+' + string) rescue 'failed')
	end

	def verify_phones
	CSV.generate do \|csv\|
	Trip.all.each do \|t\|
	csv << [t.mobile, parse_phone(t.mobile)]
	end
	end

ewalk153 / pg_hrefresh.sh

Created July 23, 2013 19:14

heroku and postgres script to restore from the latest backup

	#!/bin/sh

	DIR="$(basename $(PWD))"
	DIR="${DIR/-/_}"
	if [ "$1" == "execute" ]
	then
	if [ ! -f 'dump.db' ]
	then
	echo "downloading backup"
	curl `heroku pgbackups:url` > dump.db

ewalk153 / fix_perm.sh

Created June 3, 2013 09:11

Quick script to remove exec permissions on all files in a directory, recursively.

find . -type f -name "*.go" -exec chmod a-x {} +

ewalk153 / gotit.go

Created May 27, 2013 23:52

Simple web app to listen for incoming requests

	package main

	import (
	"fmt"
	"log"
	"net/http"
	"os"
	)

	func handler(w http.ResponseWriter, r *http.Request) {

ewalk153 / networkTest.go

Last active December 17, 2015 13:10

Go script for testing your internet connection (by downloading an large file and verifying that it continues to download).

ewalk153 / config.ru

Last active December 16, 2015 00:09

quick script to accept post data