According to https://community.letsencrypt.org/t/certbot-1-9-0-release/135414 :

Changed
certbot-auto was deprecated on all systems except for those based on Debian or RHEL.

And from this website: https://community.letsencrypt.org/t/fail-to-detect-amazon-linux-2-certbot/136140

The best chance to get Certbot working on Amazon Linux 2 is to install the rpm from EPEL as described here: https://aws.amazon.com/blogs/compute/extending-amazon-linux-2-with-epel-and-lets-encrypt/

For Ubuntu 16.04, Let’s Encrypt client (certbot). Reset or set up a new AWS Instance(Linux).

sudo apt install software-properties-common

sudo add-apt-repository ppa:certbot/certbot

sudo apt update

sudo apt install certbot python3-certbot-nginx

To check version number, run

certbot --version

Sample output:

certbot 0.31.0

The below command only works when port 80 is open AWS

sudo certbot --nginx --agree-tos --redirect --uir --hsts --staple-ocsp --must-staple -d www.example.com,example.com --email you@example.com

Here is instructions on how to install certbot on any system: https://certbot.eff.org/instructions

Particularly for Ubuntu 18.04 with Nginx webserver I was able to install certbot using the following commands:

snap install core
snap refresh core
snap install --classic certbot

Then you can run certbot using certbot command

What worked for me was to follow this part from Extending Amazon Linux 2 with EPEL official docs:

cd /tmp
wget -O epel.rpm –nv \
https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
sudo yum install -y ./epel.rpm
sudo yum install python2-certbot-apache.noarch

After that, certbot renew started to work.

We dropped certbot altogether on our amazon linux as we couldn't install snapd. We are using getssl (another acme client) and it is looking good. getssl on github

You'll have to install certbot instead of certbot-auto

The official certbot docs recommend installing it using snapd but unfortunately you cannot install snapd on Amazon Linux 2 due to some missing selinux dependencies

You have 2 options at this point

Install it using epel-extras (easier but older certbot)

• Remove certbot-auto first

sudo amazon-linux-extras install epel
sudo yum install -y certbot python-certbot-dns-route53

Install it using pip (a little complicated but you get the latest certbot)

• Remove certbot-auto
• Make sure you have python3 and pip installed

sudo python3 -m venv /opt/certbot/
sudo /opt/certbot/bin/pip install --upgrade pip
sudo /opt/certbot/bin/pip install certbot
sudo ln -s /opt/certbot/bin/certbot /usr/bin/certbot
sudo /opt/certbot/bin/pip install certbot-dns-route53