Make sure that you have the license for Acronis Backup & Recovery 11.5 and (optionally) Universal Restore.
Run the appropriate installation file (an .i686 or an .x86_64 file) as the root user.
Accept the terms of the license agreement.
Type your Acronis Backup & Recovery 11.5 license key. Likewise, you can add a license key for the Universal Restore.
Select the components that you want to install.
If you install the software in Red Hat Enterprise Linux or CentOS, the setup program may notify you about the absence of some of the required Linux packages. Select Continue to try to install these packages automatically (recommended), or select Skip to skip the package installation. For more detailed information about the required packages, see the "Linux packages" section.
The setup program tries to automatically compile the SnapAPI module for your Linux kernel. If it fails to do so, please refer to the file: /usr/lib/Acronis/BackupAndRecovery/HOWTO.INSTALL.