Log in to your WHM server as a system administrator or root user
On your WHM, open the terminal
Execute the following command in the terminal
sh <(curl -L https://download.acronis.com/ci/cpanel/install_acronis_cpanel.sh || wget -O - https://download.acronis.com/ci/cpanel/install_acronis_cpanel.sh)
This command will download and run the installation script. The installation script will install the latest stable version of the plugin automatically. Additionally, it will register the Stable plugin repository on the system for further plugin updates via yum or apt utilities.