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# should install aria2c from latest source
# requirements: sudo apt install libgnutls-dev nettle-dev libgmp-dev libssh2-1-dev libc-ares-dev libxml2-dev zlib1g-dev libsqlite3-dev pkg-config libcppunit-dev autoconf automake autotools-dev autopoint libtool
#sudo apt-get install -y aria2

sudo useradd aria2
sudo mkdir /aria2
sudo mkdir /aria2/dl
sudo mkdir /aria2/log
sudo touch /aria2/aria2.session
sudo bash -c "cat <<EOT > /aria2/aria2.conf

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#!/bin/bash

# Usage:
#   1. save this gist to some where
#   2. update your ssh command, like:
#       /path/to/ssh-agent-for-github.sh ssh -A user@your-server
#   3. you should able to access github with your ssh key now, try "ssh -T git@github.com" to confirm it

# NOTICE: you may want to change this value!
GITHUB_SSH_KEY=~/.ssh/my_github_rsa

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Auto-starting VirtualBox VMs on OS X

After finding a lot of other posts on the topic that didn't work out for me this one did the trick so I'm reposting for my own sense of self preservation.

Link to original article.

Copy the Virtualbox autostart plist template file to your system's LaunchDaemons folder.

sudo cp \

/Applications/VirtualBox.app/Contents/MacOS/org.virtualbox.vboxautostart.plist \

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1. The texture target needs to be GLES20.GL_TEXTURE_EXTERNAL_OES instead of GL_TEXTURE_2D, e.g. in the glBindTexture calls and glTexParameteri calls.

2. In the fragment shader define a requirement to use the extension:
#extension GL_OES_EGL_image_external : require

3. For the texture sampler used in the fragment shader, use samplerExternalOES instead of sampler2D.

Everything below here is all in the C code, no more Java.

4. In the C code, use glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, eglImage) to specify where the data is, instead of using glTexImage2D family of functions.

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#ifndef __ALIPAY_H__
#define __ALIPAY_H__

#include "base64/base64.h"
#include <curl/curl.h>
#include <map>
#include <openssl/bio.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/err.h>

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/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which