Transfer files between your phone and Linux with this open source tool

The qrcp project offers a way to quickly copy files from your iPhone or Android device to your Linux computer and vice versa.
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Are you looking for a way to quickly copy files from your iPhone or Android mobile device to your Linux computer or from your Linux computer to your devices? I recently discovered an open source application that's easy to install and makes transferring files as simple as a QR code.

 

The qrcp project provides a command that generates a QR code in your terminal that allows you to send or receive files to your computer over the network.

Install qrcp on Linux, Windows, or Mac

The developer, Claudio d'Angelis, has released the qrcp application with an MIT license on GitHub. I found it easy to install and easy to use. It's available for Linux, Windows, and macOS, and can be downloaded as an RPM, DEB, or tarball. There are builds for nearly every platform, including the Raspberry Pi.

If you want to install it on Linux, download either the RPM or DEB and use your package manager to perform a local install. For example, on Fedora, CentOS, or Mageia, or similar:

$ sudo dnf install ./qrcp*rpm

If you just want to try it, you can download the tar.gz archive and run it locally:

$ tar --extract --file qrcp*tar.gz
$ ./qrcp version
qrcp 0.x.y

Set up qrcp

You can view all of the available qrcp options by using the --help option:

$ qrcp --help
$ ./qrcp --help
Usage:
 qrcp [flags]
 qrcp [command]

Available Commands:
 completion  Generate completion script
 config      Configure qrcp
 help        Help about any command
 receive     Receive one or more files
 send        Send a file(s) or directories from this host
 version     Print version number and build information.
[...]

You can configure the application by editing the default configuration file located at ~/.config/qrcp/config.json using your favorite editor or invoking the configuration wizard from the command line:

$ qrcp config

The first step is to create a configuration file. The qrcp config command takes you through this process, but there are a few tricky questions.

The first question asks you for a fully-qualified domain name. If you're using qrcp on a local network that doesn't use fully-qualified domain names (or if you don't know one way or the other), then leave this blank. The qrcp command will use your local IP address instead.

The next question prompts you for a port. Most firewalls block non-standard ports, but it's not uncommon to recognize port 8080 as Internet traffic. If your firewall blocks port 8080, then you'll still have to add an exception. Assuming your system uses firewalld, you can allow traffic on port 8080 with this command:

$ sudo firewall-cmd --add-port 8080/tcp --permanent

Decline the option to keep the network connection alive after the transfer is complete and let qrcp generate a random path.

Assuming you're on a trusted network, use an HTTP (not HTTPS) connection, so you don't have to configure TLS.

The configuration is stored in ~/.config/qrcp/config.json and is editable after the fact, so if you change your mind about any setting, it's easy to update.

The updated configuration looks like this:

{
  "fqdn": "",
  "interface": "wlp0s20f3",
  "port": 8080,
  "keepAlive": false,
  "path": "",
  "secure": false,
  "tls-key": "",
  "tls-cert": "",
  "output": "/home/don"

Transfer files with qrcp

Now you're ready to send a file from your Linux computer to your mobile device. In this example, I used my iPhone, which infamously offers no support Linux at all. The process is exactly the same on an Android device.

Here's how I do it. First, I create an example file on my computer:

$ echo "Hello world"> ~/example.txt

Next, I use the send subcommand to send the file from my Linux computer to my mobile:

Linux~$ qrcp send example.txt

 

example of sending a file

Example of sending a file using qrcp send example.txt (CC BY-SA 4.0)

I open my camera application (on Android, I use a privacy-friendly dedicated QR scanner) and the iPhone scans the QR code and launches Safari on my phone. Finally, I click on the Download button.

 

example download

Download the example.txt file (CC BY-SA 4.0)

Receiving files with qrcp

Receiving files is just as easy, except the command is slightly different:

$ qrcp receive

 

example of receiving a file

Receive a file using the grcp receive command (CC BY-SA 4.0)

I scan the QR code, and it once again launches the Safari browser on my phone, but this time it appears a bit different because I'm sending files from my iPhone to the Linux computer.

 

example of selecting a file

Select a file to transfer (CC BY-SA 4.0)

I click on Choose Files, which allows me to choose the file I want to send.

 

file appears in default location

The file is downloaded to the default location (CC BY-SA 4.0)

After sending the file, it's found in the default location specified in my configuration.

Try qrcp

The project documentation is brief but adequate, and it's supported by a community of developers in addition to Claudio d'Angelis, who originally came up with the idea. The community welcomes you to join them, and the application will change the way you look at file transfers to and from your mobile devices. Try it out!

What to read next
Tags
Educator, entrepreneur, open source advocate, life long learner, Python teacher. M.A. in Educational Psychology, MSED in Educational Leadership, Linux system administrator, Follow me at @Don_Watkins .

11 Comments

If you're using KDE Plasma and want a more "Windows like" experience with better integration between the desktop and your phone, I recommend KDE Connect.

I was going to say the same. The version in Debian 10 was a bit flaky though, I don't know if the version is Debian 11 is more stable as I've not used it much.

In reply to by cjcox

I'd like more information about KDE Connect. I heard about it on Linux Unplugged but looked for it in the Apple App store. No luck. Can you post something here?

In reply to by cjcox

Conceptually, this article opens up a number of possibilities.

KDE connect is available for IOS in testflight. However, is bluetooth not a whole lot simpler? Then there is adb [push|pull]. Moreover, not sure about IOS but there is an Android app that runs a web server from which you can upload or download files (which is good for neg-tech types).

In reply to by Don Watkins

This is such a neat little command. Great find, Don. I've been using it for file transfer lately on Slackware, and it's been working great.

Thanks Seth! I've been using it a lot myself. I tried to find KDE-Connect for iOS but it's not available yet. It works okay for Android. That might be a good option when it become available.

In reply to by Seth Kenlon

Beware that the version on MacOS Homebrew seems to have been hacked. When used to copy a file to an iPhone it pops up an add for a Bitcoin site. Also it doesn't show a version. The version on github [appears to] work as expected. A very useful utility.

I assume you're not building from source on Homebrew, but performing a binary install.
You should report the issue to the Homebrew project at https://github.com/Homebrew

I don't know much about how Homebrew stores and verifies their binary packages, but the formulas for building the application looks OK (the source URL points to the Github release, the sha256sum is provided, and is correct).

In reply to by SmalleN

Hello, qrcp author here. I can't seem to find any evidence online about the Homebrew version being hacked, could you please elaborate? Also, are you able to exclude any other possible root causes for that Bitcoin site popping up?

Thanks!
Claudio

In reply to by SmalleN

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