eswarijayakumar

import boto3

session = boto3.Session(
    aws_access_key_id="<Provide your AWS access Key ID>",
    aws_secret_access_key="<Provide your AWS Secret Key>",
    region_name="us-east-1"
)

s3_client = session.client('s3')

eswarijayakumar

#!/bin/sh

public_key="<provide your public key here>"

sudo adduser --disabled-password --gecos "" testuser
sudo usermod -aG sudo testuser
sudo mkdir -p /home/testuser/.ssh && sudo touch /home/testuser/.ssh/authorized_keys
sudo chmod 700 /home/testuser/.ssh && sudo chmod 600 /home/testuser/.ssh/authorized_keys
sudo chown -R testuser /home/testuser/.ssh
sudo sh -c "echo $public_key > /home/testuser/.ssh/authorized_keys"

eswarijayakumar

System Design Cheatsheet

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

Basic Steps

1. 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?