A guide to running Bash scripts on AWS Lambda with example code. Instructions for uploading to AWS. Creating an IAM role and policy for your function. Defining your function via the CLI.

With Lets Encrypt no longer generating Expiration Notification Emails, here's a couple of ways you can replace the service with something you can build yourself. Use AWS Free tier resources to check your certificates. Learn how to automate certificate expiration checking.

Analysing 500 million records a day on the AWS Free tier. Things I learned while building a project I didn't want to pay for.