Installing Newt on Linux

You can install the latest release (1.9.0) of the newt tool from a Debian binary package (amd64). You can also download and build the latest release version of newt from source.

This page shows you how to:

  1. Set up your computer to download Debian binary packages from the JuulLabs-OSS APT repository.

    Note: The key for signing the repository has changed. If you set up your computer before release 1.1.0, you will need to download and import the public key again.

  2. Install the latest release version of newt from a Debian binary package. You can use apt-get to install the package or manually download and install the Debian binary package.

  3. Download, build, and install the latest release version of newt from source.

If you are installing on an amd64 platform, we recommend that you install from the binary package.

See Installing Previous Releases of Newt to install an earlier version of newt.

Note: We have tested the newt tool binary and apt-get install from the JuulLabs-OSS APT repository for Ubuntu version 1704. Earlier Ubuntu versions (for example: Ubuntu 14) may have incompatibility with the repository. You can manually download and install the Debian binary package.

Note: See Contributing to Newt or Newtmgr Tools if you want to:

  • Use the newt tool with the latest updates from the master branch. The master branch may be unstable and we recommend that you use the latest stable release version.

  • Contribute to the newt tool.

Setting Up Your Computer to use apt-get to Install the Package

The newt Debian packages are stored in a private APT repository on To use apt-get, you must set up the following on your computer to retrieve packages from the repository:

Note: You only need to perform this setup once on your computer. However, if you previously downloaded and imported the public key for the JuulLabs-OSS APT repository, you will need to perform step 2 again as the key has changed.

  1. Download the public key for the JuulLabs-OSS APT repository and import the key into the apt keychain.

  2. Add the repository for the binary and source packages to the apt source list.

Download the public key for the JuulLabs-OSS apt repo (Note: There is a - after apt-key add):

$ wget -qO - | sudo apt-key add -

Add the repository for the binary and source packages to the mynewt.list apt source list file:

$ sudo tee /etc/apt/sources.list.d/mynewt.list <<EOF
deb latest main

Note: Previously the repository lived under runtimeco/debian-mynewt, and although updating should remain working, if it stops pulling in the latest releases, please try updating /etc/apt/sources.list.d/mynewt.list and substitute runtimeco by JuulLabs-OSS.

Update the available packages:

$ sudo apt-get update

Note: If you are not using Ubuntu version 1704, you may see the following errors. We have provided instructions on how to manually download and install the binary package.

W: Failed to fetch  HttpError404

Installing the Latest Release of Newt from a Binary Package

You can use either apt-get to install the package, or manually download and install the Debian binary package.

Method 1: Using apt-get to Upgrade or to Install

Run the following commands to upgrade or install the latest version of newt:

$ sudo apt-get update
$ sudo apt-get install newt

Note: If you encounter build errors (such as missing sys/mman.h), please make sure you have a 32-bit glibc:

$ sudo apt-get install gcc-multilib

Method 2: Downloading and Installing the Debian Package Manually

Download and install the package manually.

$ wget
$ sudo dpkg -i newt_1.9.0-1_amd64.deb

See Checking the Installed Version of Newt to verify that you are using the installed version of newt.

Installing the Latest Release of Newt from a Source Package

If you are running Linux on a different architecture, you can build and install the latest release version of newt from source.

The newt tool is written in Go ( In order to build Apache Mynewt, you must have Go 1.12 or later installed on your system. Please visit the Golang website for more information on installing Go (

  1. Download and unpack the newt source:

    $ wget -P /tmp
    $ tar -xzf /tmp/mynewt_1_9_0_tag.tar.gz
  2. Run the to build the newt tool.

    $ cd mynewt-newt-mynewt_1_9_0_tag
    $ ./
    $ rm /tmp/mynewt_1_9_0_tag.tar.gz
  3. You should see the newt/newt executable. Move the executable to a bin directory in your PATH:

    • If you previously built newt from the master branch, you can move the binary to your $GOPATH/bin directory.

      $ mv newt/newt $GOPATH/bin
    • If you are installing newt for the first time and do not have a Go workspace set up, you can move the binary to /usr/bin or a directory in your PATH:

      $ mv newt/newt /usr/bin

Checking the Installed Version of Newt

  1. Check which newt you are using and that the version is the latest release version.

    $ which newt
    $ newt version
    Apache Newt version: 1.9.0
  2. Get information about newt:

    $ newt
    Newt allows you to create your own embedded application based on the Mynewt
    operating system. Newt provides both build and package management in a single
    tool, which allows you to compose an embedded application, and set of
    projects, and then build the necessary artifacts from those projects. For more
    information on the Mynewt operating system, please visit
    Please use the newt help command, and specify the name of the command you want
    help for, for help on how to use a specific command
      newt [flags]
      newt [command]
      newt help [<command-name>]
        For help on <command-name>.  If not specified, print this message.
    Available Commands:
      apropos      Search manual page names and descriptions
      build        Build one or more targets
      clean        Delete build artifacts for one or more targets
      create-image Add image header to target binary
      debug        Open debugger session to target
      docs         Project documentation generation commands
      help         Help about any command
      info         Show project info
      load         Load built target to board
      man          Browse the man-page for given argument
      man-build    Build man pages
      mfg          Manufacturing flash image commands
      new          Create a new project
      pkg          Create and manage packages in the current workspace
      resign-image Obsolete
      run          build/create-image/download/debug <target>
      size         Size of target components
      target       Commands to create, delete, configure, and query targets
      test         Executes unit tests for one or more packages
      upgrade      Upgrade project dependencies
      vals         Display valid values for the specified element type(s)
      version      Display the Newt version number
          --escape            Apply Windows escapes to shell commands
      -h, --help              Help for newt commands
      -j, --jobs int          Number of concurrent build jobs (default 4)
      -l, --loglevel string   Log level (default "WARN")
      -o, --outfile string    Filename to tee output to
      -q, --quiet             Be quiet; only display error output
      -s, --silent            Be silent; don't output anything
      -v, --verbose           Enable verbose output when executing commands
    Use "newt [command] --help" for more information about a command.