A simple SFTP server for testing

In this post, we will be running a sftp server we’ve build to be as simple as possible. It’s open source, made from a single binary and so bare bone it fits in a single file with less than 100 line of code, leaving you a bit of room to extend it for your needs (or not) with no headache so you can enjoy the rest of your day.

If you’re looking for a fully featured SFTP server with all the bells and whistles check our guide on setting up a full fledge SFTP server.

So let’s get on with it:

Step1: download the sftp binary

~/$ curl -O https://archive.kerjean.me/public/2022/sftp.bin
% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                               Dload  Upload   Total   Spent    Left  Speed
100 4892k  100 4892k    0     0   601k      0  0:00:08  0:00:08 --:--:--  943k
~/$ chmod +x sftp.bin

Step2: run it

~/$ ./sftp.bin
Listening on [::]:2022

That’s it, you’re done, you can already connect to the server to make sure everything is fine:

~/$ sftp -P 2022 anonymous@127.0.0.1
The authenticity of host '[127.0.0.1]:2022 ([127.0.0.1]:2022)' can't be established.
RSA key fingerprint is SHA256:+/SnmXxy1tzUaKaosZNUZf+edw8dZ8GIOzCBXyKjQcI.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '[127.0.0.1]:2022' (RSA) to the list of known hosts.
anonymous@127.0.0.1's password:
Connected to 127.0.0.1.
sftp> pwd
Remote working directory: /home/mickael/Downloads

If you have a hard time converting everbody to the CLI, check our SFTP client the people you work with will love:

A simple SFTP server for testing

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