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This project is officially supported by GL.iNet.

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flowchart TB
s[rttys with public IP address]
u1["User(Web Browser)"] --> s
u2["User(Web Browser)"] --> s
u3["User(Web Browser)"] --> s
s --> c1["rtty(Linux Device)"]
s --> c2["rtty(Linux Device)"]
s --> c3["rtty(Linux Device)"]

It is composed of a client and a server. The client is written in pure C. The server is written in go language and the front-end is written in Vue.

You can access your device's terminal from anywhere via the web. Distinguish your different device by device ID.

rtty is very suitable for remote maintenance your or your company's thousands of Linux devices deployed around the world.


  • The client is writen in C language, very small, suitable for embedded Linux
    • No SSL: rtty(32K) + libev(56K)
    • Support SSL: + libmbedtls(88K) + libmbedcrypto(241K) + libmbedx509(48k)
  • Execute command remotely in a batch of devices
  • SSL support: openssl, mbedtls, CyaSSl(wolfssl)
  • mTLS
  • Very convenient to upload and download files
  • Access different devices based on device ID
  • Support HTTP Proxy - Access your device's Web
  • Fully-featured terminal based on Xterm.js
  • Simple to deployment and easy to use

Who's using rtty

Dependencies of the Client side

How to install rtty

For Linux distribution

Install Dependencies

sudo apt install -y libev-dev libssl-dev      # Ubuntu, Debian
sudo pacman -S --noconfirm libev openssl      # ArchLinux
sudo yum install -y libev-devel openssl-devel # Centos

Clone the code of rtty

git clone --recursive


cd rtty && mkdir build && cd build
cmake .. && make install

For Buildroot

Select rtty in menuconfig and compile it

Target packages  --->
    Shell and utilities  --->
        [*] rtty

Command-line Options

Usage: rtty [option]
    -I, --id=string          Set an ID for the device(Maximum 63 bytes, valid
                             character:letter, number, underline and short line)
    -h, --host=string        Server's host or ipaddr(Default is localhost)
    -p, --port=number        Server port(Default is 5912)
    -d, --description=string Add a description to the device(Maximum 126 bytes)
    -a                       Auto reconnect to the server
    -s                       SSL on
    -C, --cacert             CA certificate to verify peer against
    -x, --insecure           Allow insecure server connections when using SSL
    -c, --cert               Certificate file to use"
    -k, --key                Private key file to use"
    -D                       Run in the background
    -t, --token=string       Authorization token
    -f username              Skip a second login authentication. See man login(1) about the details
    -R                       Receive file
    -S file                  Send file
    -v, --verbose            verbose
    -V, --version            Show version
    --help                   Show usage

How to run rtty

Replace the following parameters with your own parameters

sudo rtty -I 'My-device-ID' -h 'your-server' -p 5912 -a -v -d 'My Device Description'

If your rttys is configured with mTLS enabled (device key and certificate required), add the following parameters(Replace the following with valid paths to your own)

-k /etc/ssl/private/abc.pem -c /etc/ssl/certs/abc.pem

You can generate them e.g. via openssl tool openssl req -x509 -newkey ec -pkeyopt ec_paramgen_curve:secp521r1 -keyout /tmp/key.pem -out /tmp/cert.pem -days 18262 -nodes -subj "/C=CZ/O=Acme Inc./OU=ACME/CN=ACME-DEV-123"

If your rttys is configured with a token, add the following parameter(Replace the following token with your own)

-t 34762d07637276694b938d23f10d7164


Use your web browser to access your server: http://your-server-host:5913, then click the connection button

connect devices with no web login required(you need to configure the device white list on the server)



Transfer file

Transfer file from local to remote device

rtty -R

Transfer file from remote device to the local

rtty -S test.txt


If you would like to help making rtty better, see the file.