Install Erlang on Ubuntu 22.04/Ubuntu 20.04

This tutorial provides a step-by-step guide on how to install Erlang on Ubuntu 22.04/Ubuntu 20.04. According to erlang.org, Erlang is a programming language used to build massively scalable soft real-time systems with requirements on high availability. Some of its uses are in telecoms, banking, e-commerce, computer telephony and instant messaging. Erlang’s runtime system has built-in support for concurrency, distribution and fault tolerance.

Install Erlang on Ubuntu 22.04/Ubuntu 20.04

There are two way to install Erlang:

Install Erlang using Prebuilt binaries
Install Erlang by compiling from the source

Install Erlang using Prebuilt binaries

The default Ubuntu repositories provides Erlang packages. However, the available packages may not be up-to-date.

Erlang/OTP 24.2.2 is the the current release versions as of this writing.

Install Erlang on Ubuntu 22.04 using Prebuilt binaries

The default Ubuntu 22.04 repos provides version 24.2.1;

apt-cache policy erlang

erlang:
  Installed: (none)
  Candidate: 1:24.2.1+dfsg-1
  Version table:
     1:24.2.1+dfsg-1 500
        500 http://ke.archive.ubuntu.com/ubuntu jammy/universe amd64 Packages

Thus, if you want to install Erlang on Ubuntu 22.04 using the prebuild binary, run the command below;

apt install erlang

The Erlang distribution also includes OTP (Open Telecom Platform) which provides a rich set of libraries and applications.

To install Erlang on Ubuntu 20.04 using Prebuilt binaries

To install latest release version of Erlang on Ubuntu 20.04, you first need to install the Erlang repository as follows;

wget https://packages.erlang-solutions.com/erlang-solutions_2.0_all.deb

apt install ./erlang-solutions_2.0_all.deb

apt update

apt install erlang

Similarly, the Erlang distribution also includes OTP (Open Telecom Platform) which provides a rich set of libraries and applications.

Install Erlang by Compiling from the source

If you want to run the latest version of Erlang on Ubuntu 22.04/Ubuntu 20.04, then you can build it from the source.

Install Required Build Utilities

apt install zip libncurses-dev sed git tar make gcc perl openssl flex bison default-jdk libssl-dev unixodbc-dev libwxgtk3.0-gtk3-dev libwxgtk-webview3.0-gtk3-dev libglu1-mesa-dev fop xsltproc libxml2-utils apache2

Download Erlang Source Code

VER=24.2.2

wget https://github.com/erlang/otp/releases/download/OTP-$VER/otp_src_$VER.tar.gz

Extract the Source code

tar xzf otp_src_$VER.tar.gz

Configure, build and install Erlang;

cd otp_src_$VER

export ERL_TOP=`pwd`

./configure

Before you can proceed, ensure that the configure script above returns no error.

make

Run smoke test to ensure the build is successful;

make release_tests

cd release/tests/test_server

~/otp_src_24.2.2/bin/erl -s ts install -s ts smoke_test batch -s init stop

Next, access $ERL_TOP/release/tests/test_server/index.html in your web browser and make sure that there are zero failed test cases.

rsync -avP ~/otp_src_24.2.2 /var/www/html/

sed -i 's|/var/www/html|/var/www/html/otp_src_24.2.2/release/tests/test_server/|' /etc/apache2/sites-available/000-default.conf

chown -R www-data: /var/www/html/otp_src_24.2.2/release/tests/test_server

systemctl restart apache2

Access the Web Server, http://<server-IP>.

Install Erlang from Source on Ubuntu 22.04/Ubuntu 20.04 if all well from the test above.

cd ~/otp_src_24.2.2/

make install

Using Erlang

You can now start using Erlang language for your programming.

erl

Check current working directory by running the command pwd().;

Erlang/OTP 24 [erts-12.2.1] [source] [64-bit] [smp:2:2] [ds:2:2:10] [async-threads:1] [jit]

Eshell V12.2.1  (abort with ^G)
1> pwd().
/home/kifarunix
ok
2>

You can now start writing your projects in specific directories. For example in the above, I am working from /home/kifarunix directory.

Creating an Hello World program;

cat > hello_world.erl << 'EOL'
-module(hello_world).
   -export([hello_world/0]).

hello_world() ->
    io:fwrite("hello world\n").
EOL

Next, execute the program;

erl

Erlang/OTP 24 [erts-12.2.1] [source] [64-bit] [smp:2:2] [ds:2:2:10] [async-threads:1] [jit]

Eshell V12.2.1  (abort with ^G)
1> pwd().
/home/kifarunix
ok
2> c(hello_world).
{ok,hello_world}
3> hello_world:hello_world().
hello world
ok
4>

You can check further examples on Erlang by Example.

Install Erlang on Ubuntu 22.04/Ubuntu 20.04