Downloading the latest file in an S3 bucket using AWS CLI? [duplicate]

Question

I have an S3 bucket that contains database backups. I am creating a script to download the latest backup (and eventually restore it somewhere else), but I'm not sure how to go about only grabbing the most recent file from a bucket.

Is it possible to copy only the most recent file from an S3 bucket to a local directory using AWS CLI tools?

Answer 1

And here is a bash script create based on @error2007s's answer. This script requires your aws profile and bucket name as variables, and downloads the latest object to your ~/Downloads folder:

#!/bin/sh PROFILE=your_profile BUCKET=your_bucket  OBJECT="$(aws s3 ls --profile $PROFILE $BUCKET --recursive | sort | tail -n 1 | awk '{print $4}')" aws s3 cp s3://$BUCKET/$OBJECT ~/Downloads/$OBJECT --profile $PROFILE 

Answer 2

The above solutions are using Bash. If one wants to do the same thing in PowerShell for downloading on Windows here is the script:

# This assumes AWS CLI exe is in your path. $s3location = "s3://bucket-name" $files = $(aws s3 ls $s3location --recursive | sort | select -last 3) $dlPath = "C:\TEMP"  foreach ($s3FileInfo in $files) {     $filename = $s3FileInfo.Split()[-1]     $path = "${s3location}/${filename}"     aws s3 cp $path $dlPath     echo("Done downloading ${path} to ${dlPath}") }