Enderson Maia endersonmaia

Some books I've been studying to improve my skills as a SRE/System Engineer.

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

Hello software developers,

Please check your code to ensure you're not making one of the following mistakes related to cryptography.

I. General Mistakes

Writing your own home-grown cryptography primitives (For example: Mifare Classic)
- Exception: For the sake of learning, but don't deploy it in production.
Using a fast hash function (e.g. MD5, SHA256) for storing passwords. Use bcrypt instead.
Not using a cryptographically secure random number generator

Maximizing S3 Peformance

137% increase in AWS usage in the last year
Factors to keep in mind when picking a region
- Performance: Proximity to users and to other resources in AWS
- Compliance
- Cost
Naming scheme is the most important thing

Gist

This is a quick tutorial explaining how to get a static website hosted on Heroku.

Why do this?

Heroku hosts apps on the internet, not static websites. To get it to run your static portfolio, personal blog, etc., you need to trick Heroku into thinking your website is a PHP app. This 6-step tutorial will teach you how.

Basic Assumptions

Awesome PHP

Awesome PHP has been relocated permanently to its own Github repository. No further updates will made to this gist.

Please open an issue for any new suggestions.

	version: '3'
	services:
	# FRONT
	chronograf:
	# Full tag list: https://hub.docker.com/r/library/chronograf/tags/
	image: chronograf
	deploy:
	replicas: 1
	placement:
	constraints:

	DROP TABLE if exists d_date;

	CREATE TABLE d_date
	(
	date_dim_id INT NOT NULL,
	date_actual DATE NOT NULL,
	epoch BIGINT NOT NULL,
	day_suffix VARCHAR(4) NOT NULL,
	day_name VARCHAR(9) NOT NULL,
	day_of_week INT NOT NULL,

	build_package_patched() {
	# These three patches are included when RVM builds REE
	cd source
	wget 'https://github.com/wayneeseguin/rvm/raw/master/patches/ree/1.8.7/tcmalloc.patch'
	wget 'https://github.com/wayneeseguin/rvm/raw/master/patches/ree/1.8.7/stdout-rouge-fix.patch'
	wget 'https://github.com/wayneeseguin/rvm/raw/master/patches/ree/1.8.7/no_sslv2.diff'
	patch -p1 < tcmalloc.patch
	patch -p1 < stdout-rouge-fix.patch
	patch -p1 < no_sslv2.diff
	cd ..

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048