Mono is an open-source implementation of Microsoft's .NET Framework based on the ECMA standards for C# and the Common Language Runtime. A growing family of solutions and an active and enthusiastic contributing community helps position Mono to become the leading choice for the development of cross-platform applications.
In this guide, we will install Mono on CentOS 7.
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Updating System Packages
It is recommended that you update the system to the latest packages before beginning any significant installations. Issue the command below:
sudo yum update -y
Step 1: Install Mono GPG Keys
Issue the command below to install the Mono GPG keys required to install the latest version of Mono from its official repository.
rpmkeys --import "http://pool.sks-keyservers.net/pks/lookup?op=get&search=0x3fa7e0328081bff6a14da29aa6a19b38d3d831ef"
su -c 'curl https://download.mono-project.com/repo/centos7-stable.repo | tee /etc/yum.repos.d/mono-centos7-stable.repo'
Step 2: Install Mono
Issue the command below to install Mono.
sudo yum install mono-complete
The package mono-complete should be installed to install everything - this should cover most cases of "assembly not found" errors.
Note: You can also issue the command sudo yum install mono-devel to compile code.
Step 4: Verify Installation
After installing the Mono package, issue the command below to verify the installation which will output the Mono version:
mono --version
