# gex = gajumaru exchange

Currently there is only one thing, which is the Gajumaru HTTP Daemon.

## How to run `gex_httpd`

Last updated: September 23, 2025 (PRH).

1.  **Install Erlang and zx/zomp**

    Source: [*Building Erlang 26.2.5 on Ubuntu 24.04*](https://zxq9.com/archives/2905)

    Adapt this to your Linux distribution.

    1.a.    **Install necessary build tools**

            ```bash
            sudo apt update
            sudo apt upgrade
            sudo apt install \
                gcc curl g++ dpkg-dev build-essential automake autoconf \
                libncurses-dev libssl-dev flex xsltproc libwxgtk3.2-dev \
                wget vim git
            ```

    1.b.    **Put [Kerl](https://github.com/kerl/kerl) somewhere in your
            `$PATH`**. This is a tool to build Erlang releases.

            ```bash
            wget -O ~/bin/kerl https://raw.githubusercontent.com/kerl/kerl/master/kerl
            chmod u+x ~/bin/kerl
            ```

    1.c.    **Build Erlang from source using Kerl**

            ```bash
            kerl update releases
            ## use the most recent one that looks stable
            ## you do need to type the number twice, that's not a typo
            kerl build 28.1 28.1
            kerl install 28.1 ~/.erts/28.1
            ```

    1.d.    **Put Erlang in your `$PATH`**

            Update .bashrc or .zshrc or whatever with the following line:

            ```bash
            . $HOME/.erts/28.1/activate
            ```


    1.e.    **Install zx**

            ```bash
            wget -q https://zxq9.com/projects/zomp/get_zx && bash get_zx
            ```

    1.f.    **Test zx works**

            zx installs itself to `~/bin`, so make sure that's in your
            `$PATH`.

            ```bash
            zx run erltris
            ```