Leonardo Lemos leolemos

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

	#!/bin/bash

	# NextCloud Optimization Script
	# with PHP Opcache and Redis Memcache
	# Important: Do not run until the setup wizard in your browser is complete (has initialized the config.php file).
	# Author: Autoize (autoize.com)

	upload_max_filesize=4G # Largest filesize users may upload through the web interface
	post_max_size=4G # Same as above
	memory_limit=512M # Amount of memory NextCloud may consume

	#!/bin/sh

	# NextCloud to BackBlaze B2 Backup Script
	# Author: Autoize (autoize.com)

	# This script creates an incremental backup of your NextCloud instance at BackBlaze's off-site location.
	# BackBlaze B2 is an object storage service that is much less expensive than using Amazon S3 for the same purpose, with similar versioning and lifecycle management features.
	# Uploads are free, and storage costs only $0.005/GB/month compared to S3's $0.022/GB/month.

	# Requirements

	#!/bin/bash
	## Install phpMyAdmin on ISPConfig
	## Debian 9 or Ubuntu (Apache2 and Nginx)
	## phpMyAdmin 4.8.3

	cd /tmp/
	get_file=https://files.phpmyadmin.net/phpMyAdmin/4.8.3/phpMyAdmin-4.8.3-all-languages.tar.gz
	wget ${get_file}
	tar -xzvf $(basename ${get_file})
	rm -f $(basename ${get_file}) && mv phpMyAdmin-*-all-languages myadmin

	# Read the contents of ~/.path into $PATH, if ~/.path exists. ~/.path should be a file
	# consisting of one path on each line, such as:
	#
	# ~$ cat ~/.path
	# # vim: ft=sh
	# ~/usr/bin
	# /opt/local/bin
	# ... etc ...
	#
	# Note that comments begin with a hash (#).

	# Alias: Files & Folders
	alias ls="ls --color=auto"
	alias la="ls -aF"
	alias lc="ls -lcr"
	alias ld="ls -ld"
	alias lk="ls -lSr"
	alias ll="ls -lF"
	alias lla="ls -al"
	alias lm="ls -al \| more"
	alias lr="ls -lR"