Letsencrypt allows you to get a free certificate that you will need to renew each three months.
There are a lot of tutorials online on how to get one or more and I would like more to focus on how to delete them when you don't need it anymore.
Deleting a SSL certificate is not about just deleting one file only.
Here is a list of aliases I use more or less frequently. Aliases and shell functions is a thing that I couldn't live without. It helps you type less to do more. I've been using zsh for a while now and I've never been a real fan about bash. Prior to that shell I used to work with diferrent ksh variants.