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@floehopper
floehopper / install.md
Last active May 22, 2024 13:38
Install rtl-sdr on Raspian on Raspberry Pi
jamesmead@floehopper.local:~$ sudo dd bs=1m if=/Users/jamesmead/Downloads/2015-02-16-raspbian-wheezy.img of=/dev/disk2
pi@raspberrypi ~ $ sudo raspi-config
# Choose option 1 to "Expand Filesystem" - Ensures that all of the SD card storage is available to the OS
# Choose Finish & reboot

pi@raspberrypi ~ $ sudo apt-get update
#!/usr/bin/env python
"""Describe EC2 instances bound to DNS name. Lookup CNAME of DNS,
which can point to ELB or EC2 instance. Get info from AWS API.
DNS names should be passed as arguments to the script.
Valid AWS API credentials must be configured, see
http://docs.pythonboto.org/en/latest/getting_started.html#configuring-boto-credentials
"""
from __future__ import print_function
@sergray
sergray / check_ssl_certificate.py
Last active January 2, 2016 01:59
python script checking SSL certificates, taken from superuser.com
#!/usr/bin/env python
"""
Usage: check_ssl_certificate.py -H <host> -p <port> [-m <method>]
[-c <days>] [-w <days>]
-h show the help
-H <HOST> host/ip to check
-p <port> port number
-m <method> (SSLv2|SSLv3|SSLv23|TLSv1) defaults to SSLv23
-c <days> day threshold for critical
-w <days> day threshold for warning
@glennschler
glennschler / Setup OpenVPN.md
Last active March 5, 2023 00:13
Setup OpenVPN server running on Amazon ec2.

OpenVPN Technologies has provided their SSL VPN solution in a free virtual machine image that can be hosted in the Amazon cloud. This allows anyone to quickly setup their own VPN solution to provide secure internet access, or a secure network between local and remote locations. With Amazon EC2 the cost can be free for the first year, and then can cost less than one US cent ($.005) per hour depending on configuration and bandwidth needs. The OpenVPN license is free for the first two users.

The instructions given by OpenVPN are thorough and easy to follow. They also describe an optional step on how to setup an Amazon static IP address. For free tier or other users who will leave the instance running full-time there is zero cost for this static IP, but for users who plan to only run the VPN on an hourly basis there will be additional ip "reservation" cost for e

@jboner
jboner / latency.txt
Last active May 23, 2024 06:51
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@1stvamp
1stvamp / mac-curl-ca-bundle.sh
Created March 22, 2012 12:50
Script to install cURL CA certificates on OS X without macports
#!/bin/bash
mkdir /tmp/curl-ca-bundle
cd /tmp/curl-ca-bundle
wget http://curl.haxx.se/download/curl-7.22.0.tar.bz2
tar xzf curl-7.22.0.tar.bz2
cd curl-7.22.0/lib/
./mk-ca-bundle.pl
if [ ! -d /usr/share/curl/ ]; then
sudo mkdir -p /usr/share/curl/
else
@dahlia
dahlia / hstore.py
Created February 18, 2012 14:58
PostgreSQL hstore + SQLAlchemy
""":mod:`hstore` --- Using PostgreSQL hstore with SQLAlchemy
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. note::
I released it under Public Domain. Feel free to use!
It provides :class:`Hstore` type which makes you to store Python
dictionaries into hstore columns in PostgreSQL. For example::
@owais
owais / last-skype-chat
Created November 8, 2011 17:38
Skype recent chat hotkey for linux
#!/usr/bin/env python
import dbus
PLUGIN_NAME = "OpenLastSkypeChat"
bus = dbus.SessionBus()
skype_dbus_object = bus.get_object('com.Skype.API', '/com/Skype')
skype = dbus.Interface(skype_dbus_object, dbus_interface='com.Skype.API')
@necolas
necolas / snippet.js
Created June 14, 2011 20:36
Optimised async loading of cross-domain scripts
/*
* Updated to use the function-based method described in http://www.phpied.com/social-button-bffs/
* Better handling of scripts without supplied ids.
*
* N.B. Be sure to include Google Analytics's _gaq and Facebook's fbAsyncInit prior to this function.
*/
(function(doc, script) {
var js,
fjs = doc.getElementsByTagName(script)[0],
@onyxfish
onyxfish / fabfile.py
Created February 9, 2010 23:05
Chicago Tribune News Applications fabric deployment script
from fabric.api import *
"""
Base configuration
"""
env.project_name = '$(project)'
env.database_password = '$(db_password)'
env.site_media_prefix = "site_media"
env.admin_media_prefix = "admin_media"
env.newsapps_media_prefix = "na_media"