How to install Erlang on Rocky Linux/Alma Linux/CentOS 8

Erlang is a functional, general-purpose, concurrent programming language and garbage-collected runtime environment built for concurrency, fault tolerance, and distributed application architectures. It is supported and maintained by Ericsson OTP product unit.

In this guide, we will install Erlang/OTP in a Rocky Linux/Alma Linux/CentOS 8.

# Prerequisites

You need the following to follow along

  • Updated Rocky Linux/Alma Linux 8 server
  • Root access or user with root access
  • Internet access from the server

# Table of Content

  1. Updating the system
  2. Installing Erlang
  3. Creating Hello world program

# 1. Updating the system

Let us ensure that our server packages are up to date using this command:

sudo dnf -y update

Let us also install some common packages

sudo dnf install vim -y

# 2. Installing Erlang

The Erlang package is distributed via Yum repositories on  PackageCloud. Install the PackageCloud Yum repository using this command:
<meta charset="utf-8">curl -s | sudo bash

This is the output on my server

$ curl -s | sudo bash

Detected operating system as rocky/8.
Checking for curl...
Detected curl...
Downloading repository file:
Installing yum-utils...

Rocky Linux 8 - AppStream                                                                                                       15 kB/s | 4.8 kB     00:00
Rocky Linux 8 - BaseOS                                                                                                         6.5 kB/s | 4.3 kB     00:00
Rocky Linux 8 - Extras                                                                                                          27 kB/s | 3.5 kB     00:00
rabbitmq_erlang-source                                                                                                         1.3 kB/s | 819  B     00:00
rabbitmq_erlang-source                                                                                                          21 kB/s | 3.8 kB     00:00
Importing GPG key 0xDF309A0B:
 Userid     : " ( <>"
 Fingerprint: 2EBD E413 D3CE 5D35 BCD1 5B7C 71C6 3471 DF30 9A0B
 From       :
rabbitmq_erlang-source                                                                                                         357  B/s | 296  B     00:00
Package yum-utils-4.0.18-4.el8.noarch is already installed.
Dependencies resolved.
Nothing to do.
Generating yum cache for rabbitmq_erlang...
Importing GPG key 0xDF309A0B:
 Userid     : " ( <>"
 Fingerprint: 2EBD E413 D3CE 5D35 BCD1 5B7C 71C6 3471 DF30 9A0B
 From       :
Generating yum cache for rabbitmq_erlang-source...

The repository is setup! You can now install packages.

Now we can install erlang from the added repos:

$ sudo dnf install erlang
Last metadata expiration check: 0:00:27 ago on Fri 12 Nov 2021 07:30:53 AM EAT.
Dependencies resolved.
 Package                           Architecture                      Version                                  Repository                                  Size
 erlang                            x86_64                            24.1-1.el8                               rabbitmq_erlang                             20 M

Transaction Summary
Install  1 Package

Total download size: 20 M
Installed size: 36 M
Is this ok [y/N]: y
Downloading Packages:
erlang-24.1-1.el8.x86_64.rpm                                                                                                    42 MB/s |  20 MB     00:00
Total                                                                                                                           41 MB/s |  20 MB     00:00
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                                                       1/1
  Installing       : erlang-24.1-1.el8.x86_64                                                                                                              1/1
  Running scriptlet: erlang-24.1-1.el8.x86_64                                                                                                              1/1
  Verifying        : erlang-24.1-1.el8.x86_64                                                                                                              1/1



# 3. Creating Hello world program

Create hello.erl file

vim hello.erl

Add this to the file

% This is a test Hello World Erlang Code

helloworld() ->
   fwrite("Hello from Citizix, Erlang World!\n").

Compile it from the Erlang shell. Don’t forget the full-stop (“period“) at the end of each command:

$ erl
Erlang/OTP 24 [erts-12.1] [source] [64-bit] [smp:2:2] [ds:2:2:10] [async-threads:1] [jit]

Eshell V12.1  (abort with ^G)
1> c(hello).
2> hello:helloworld().
Hello from Citizix, Erlang World!

You have successfully installed Erlang in your system.

# Conclusion

Thanks for using this tutorial for installing the Erlang programming language on your Rocky Linux/Alma Linux 8 system. For additional help or useful information, we recommend you to check the official Erlang website.

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