Dyalog APT Repository

The Dyalog APT Repository contains installation packages for 32-bit Dyalog APL for the Raspberry Pi running Raspberry Pi OS 32-bit for versions up to and including 20.0.

From version 21.0 onwards Dyalog will no longer support 32-bit Dyalog APL on the Raspberry Pi. Instead, from version 20.0 onwards you can use the 64-bit Dyalog APL for Linux/ARM64 on Raspberry Pi OS 64-bit which is available from https://www.dyalog.com/download-zone.htm.

For more information, see https://dyalog.com/dyalog/raspberry-pi.htm.

Table of Contents

• Repository
• RIDE and Dyalog APL
• Multiple Versions and /usr/bin/dyalog
• Installation
• Dyalog APL 20.0 with RIDE 4.6
• Dyalog APL 20.0
• Installing Previous Versions
• Upgrading to the Latest Version
• Run

Repository

Debian/Raspberry Pi OS

First you will need to set your Raspberry Pi up to connect to our public repository, This will allow you to keep your APL installation up to date with new releases.

The following are the supported Operating System codenames for 32-bit Dyalog APL:

• buster or later (ARMHF) - Hardware Float: this is required for Dyalog 18.2 and later

32-bit Dyalog APL does not run on 64-bit Raspberry Pi O/S. From version 20.0 onwards Dyalog APL for Linux/ARM64 (aarch64) can be used on Raspberry Pi OS 64-bit and is available from https://www.dyalog.com/download-zone.htm.

For Bookworm, the revision of the version of Dyalog APL that you are installing must be at least 48479.

wget -O - https://packages.dyalog.com/dyalog-apt-key.gpg.key | sudo apt-key add -
CODENAME=$(lsb_release -sc)
echo "deb https://packages.dyalog.com ${CODENAME} main" | sudo tee /etc/apt/sources.list.d/dyalog.list

Please note: if you update the operating system on your Pi, then you should re-run these last two commands so that /etc/apt/sources.list.d/dyalog.list accurately reflects the codename of the version of the distribution that you are running. Be aware that on Bookworm, uname -m now returns aarch64 rather than armv7l.

RIDE and Dyalog APL

If you have installed RIDE before you install Dyalog APL, then the installation process for Dyalog APL will add two icons to your desktop, one for starting Dyalog APL with a RIDE front end, and the other (which is also created if RIDE is not installed) which starts Dyalog APL in a terminal window.

Note: RIDE is only supported on a Raspberry Pi 2 or higher; RIDE is not supported on Pi 0 or 1 models.

Multiple Versions and /usr/bin/dyalog

Note: If you have multiple version of Dyalog installed, running "dyalog" from the terminal will run the latest version.

You should NOT edit /usr/bin/dyalog, but rather run

sudo update-alternatives --config dyalog

To see all the installed versions of Dyalog APL, run

sudo apt-cache search dyalog

Installation

Version 20.0 with RIDE 4.6

Latest 20.0 package: dyalog-unicode-200_20.0.54382_armhf.deb dated 2026-08-03 10:43
Latest RIDE 4.6 package: ride-4.6_4.6.4265_armhf.deb dated 2025-11-11 09:05

To install version 20.0 with the RIDE GUI Front-End run the following commands:

sudo apt-get update
sudo apt-get install dyalog-unicode

Version 20.0 Without RIDE

If you prefer to install Dyalog APL without RIDE, You can install with the following commands

sudo apt-get update
sudo apt-get install dyalog-unicode-200

Installing Older Versions

Installing previous versions of RIDE

Previous versions of RIDE

• RIDE 4.5: ride-4.5_4.5.4097_armhf.deb dated 2024-03-01 09:25, which was released with Dyalog 19.0
• RIDE 4.4: ride-4.4_4.4.3687_armhf.deb dated 2022-03-10 10:46, which was released with Dyalog 18.2

To install older RIDEs, run one of the following:

sudo apt-get install ride-4.5
sudo apt-get install ride-4.4

Installing previous versions of Dyalog APL

Previous versions of Dyalog APL

• dyalog-unicode-190: dyalog-unicode-190_19.0.54382_armhf.deb dated 2026-08-03 10:44
• dyalog-unicode-182: dyalog-unicode-182_18.2.54382_armhf.deb dated 2026-08-03 10:43

To install any previous version of Dyalog APL, run

sudo apt-get install dyalog-unicode-<version>

where <version> is one of the three digit numbers in the list above. For example

sudo apt-get install dyalog-unicode-170

Upgrade

Upgrading to the Latest Version

If you already have Dyalog APL installed you can run the following two commands to upgrade to the latest version:

sudo apt-get update
sudo apt-get dist-upgrade

Run

To run Dyalog APL you can select it from the Programming menu If you have installed the pre-release version this will start Dyalog APL within a RIDE session. Otherwise it will start a terminal with Dyalog APL running inside. Running "dyalog" from a terminal will load a Dyalog session in your terminal.