ericandrewlewis

top (the UNIX process inspector) cheat sheet

This is a list of the most helpful keyboard commands I use within top.

The basics

h shows help on interactive commands. Also see the top manual page

q to quit the program.

ericandrewlewis

Setting up a WordPress site on AWS

This tutorial walks through setting up AWS infrastructure for WordPress, starting at creating an AWS account. We'll manually provision a single EC2 instance (i.e an AWS virtual machine) to run WordPress using Nginx, PHP-FPM, and MySQL.

This tutorial assumes you're relatively comfortable on the command line and editing system configuration files. It is intended for folks who want a high-level of control and understanding of their infrastructure. It will take about half an hour if you don't Google away at some point.

If you experience any difficulties or have any feedback, leave a comment. 🐬

Coming soon: I'll write another tutorial on a high availability setup for WordPress on AWS, including load-balancing multiple application servers in an auto-scaling group and utilizing RDS.

ericandrewlewis

This cheat sheet is only for the ca65 assembler, and probably not compatible with others

adc - Add to the accumulator

lda #1 ; A = 1
adc #1 ; A = 2
ldx #5 ; X = 5
stx $01 ; memory address $01 = 5
adc $01 ; A = 7

ericandrewlewis

C++ Pointer Tutorial

Because pointers can be ugh

"Regular" variables (not pointers)

To understand a pointer, let's review "regular" variables first. If you're familiar with a programming language without pointers like JavaScript, this is what you think when you hear "variable".

When declaring a variable by identifier (or name), the variable is synonymous with its value.

ericandrewlewis

All the steps and code snippets from my tutorial series Set up an Ubuntu Web Server on an Intel NUC

Get an image

Get an Ubuntu image for your NUC

Update the apt repositories

apt update -y & apt upgrade -y

ericandrewlewis

The MIT License (MIT)
Copyright (c) 2016 Eric Andrew Lewis

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH 

ericandrewlewis

Notes on making a keyboard

Instructions for making a 60% keyboard with an abbreviated navigation cluster.

Parts & Tools

• A keycap is the part of the key that the user touches. It is non-mechanical, it is just a piece of plastic. It sits on top of a switch.
• A switch is the electro-mechanical component that, when compressed, makes an electronic connection.
• Switches are wired to a controller, which aggregates keypress info and tells the target device (e.g. Macbook Pro) what to do over USB.
• Switches sit on either a PCB or a piece of metal.
• The PCB or piece of metal sits inside a case.

ericandrewlewis

# Borrowed some configuration from 
# https://github.com/h5bp/server-configs-nginx/blob/master/nginx.conf

# Default: nobody nobody
user  nginx;

# Sets the worker threads to the number of CPU cores available in the system for best performance.
# Should be > the number of CPU cores.
# Maximum number of connections = worker_processes * worker_connections
# Default: 1

ericandrewlewis

# Simple No-ip.com Dynamic DNS Updater
#
# 1) Install DUC (Dynamic Update Client) and create the configuration file
#    as described on noip website https://my.noip.com/#!/dynamic-dns/duc
# 2) Copy this file noip2.service to /etc/systemd/system/
# 3) Execute `sudo systemctl enable noip2`
# 4) Execute `sudo systemctl start noip2`

[Unit]
Description=No-ip.com Dynamic Update Client

ericandrewlewis

; /usr/local/bin/nasm -f macho 32.asm && ld -macosx_version_min 10.7.0 -o 32 32.o && ./32

global start

section .text
start:
    push    dword msg.len
    push    dword msg
    push    dword 1
    mov     eax, 4