How To Install Erlang on CentOS 7

In this tutorial, we will show you how to install Erlang on your CentOS 7. For those of you who didn’t know, Erlang is a programming language used to build massively scalable soft real-time systems with requirements for high availability. The Erlang runtime system has built-in support for concurrency, distribution, and fault tolerance.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of Erlang on a CentOS 7 server.

Prerequisites

• A server running one of the following operating systems: CentOS 7.
• It’s recommended that you use a fresh OS install to prevent any potential issues.
• SSH access to the server (or just open Terminal if you’re on a desktop).
• A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install Erlang on CentOS 7

Step 1. First, let’s start by ensuring your system is up-to-date.

yum clean all
yum -y install epel-release
yum -y update

Step 2. Installing Erlang on CentOS 7.

Before installing Erlang, we need to install the following prerequisites:

yum install gcc gcc-c++ glibc-devel make ncurses-devel openssl-devel autoconf java-1.8.0-openjdk-devel git wget wxBase.x86_64

First, use the following commands to add Erlang apt repository on CentOS based system:

wget https://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm
rpm -Uvh erlang-solutions-1.0-1.noarch.rpm

Now, you can install the Erlang package on your system using the following command:

yum install erlang

Run the following command to verify whether Erlang is installed or not:

erl

Step 3. Erlang Hello World Program.

Let’s start with a hello world program on erlang. First, create a file helloworld.erl with the following content:

nano helloworld.erl

Add the following content:

% hello world program
-module(helloworld).
-export([start/0]).
start() ->
io:fwrite("Hello World!\n").

Compile the hello world program using the below command:

erlc helloworld.erl

 Now, run your program using the below command:

erl -noshell -s helloworld start -s init stop

Congratulations! You have successfully installed Erlang. Thanks for using this tutorial for installing Erlang on your CentOS 7 system. For additional help or useful information, we recommend you to check the official Erlang website.

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