On a fresh AWS EC2 Ubuntu 18 instance, install the following packages:

sudo apt update
sudo apt install python3.7
sudo apt install python3-pip
sudo apt install mailutils
> Select 'Internet Site'
> Select default domain

Clone this repo then enter into the new directory (s3-backup) by default

Install boto3 dependency by running pip3 install -r requirements.txt

Create a file named backup.bash with the contents:

#!/bin/bash

export BUCKET_NAME=<Name of bucket>
export ACCESS_KEY_ID=<Access key id for user>
export SECRET_ACCESS_KEY=<Secret key for user>
export BACKUP_DIR=<Path to directory to backup (for testing use 'data')>
export BACKUP_HOME=<Path to this repo>
export EMAIL=<Email address>

python $BACKUP_HOME/upload.py; cat $BACKUP_HOME/backup.log | mail $EMAIL

Then sudo chmod +x backup.bash

Add cron job by running crontab -e then add the following to the bottom of the file

0 0 * * * /home/ubuntu/s3-backup/backup.bash

If the repo was cloned into another location the path to backup.bash should be changed to reflect that

Files will be backed up to S3 at midnight every night. An email is sent with the log file contents