I received this error when trying to copy files from an ec2 instance to an S3 bucket.

Credentials were checked, double and triple checked. The issue in my case was the aws cli version on the ec2 was too old.

To upgrade to the latest, carry out the instructions here:

https://www.linuxtutorial.co.uk/install-the-aws-cli-using-the-bundled-installer/

Simple instructions to install an SFTP server on Amazon Linux backed with S3 Storage.

1. Launch Amazon Linux 2 instance (micro is sufficient)

2. Install and configure s3fs:

2.1 Install dependencies

sudo yum install automake fuse fuse-devel gcc-c++ git libcurl-devel libxml2-devel make openssl-devel

2.2 Compile and install s3fs:

git clone https://github.com/s3fs-fuse/s3fs-fuse.git
cd s3fs-fuse
./autogen.sh
./configure
make
sudo make install

3. Create and Mount S3 Bucket:

3.1 Create S3 Bucket:

Through AWS GUI

This tutorial will make use of Amazon’s S3 (Storage) service and Amazon S3Tools (Linux Client). A bash script will be created to automate the backup of files to S3.

1. Sign into Amazon AWS Console

2. Create a new user for Amazon S3 (Identity and Access Management)

3. Click on the newly created username > Permissions > Attach Policy – AmazonS3FullAccess > Download the credentials

4. Install Amazon S3Tools on linux server:

apt-get update
apt-get install python-setuptools
cd home
wget http://sourceforge.net/projects/s3tools/files/s3cmd/1.6.1/s3cmd-1.6.1.tar.gz
tar -xvf s3cmd-1.6.1.tar.gz
cd s3cmd-1.6.1
python setup.py install