Unable to install Plesk on Red Hat systems: Failed to solve dependencies

Symptoms

Plesk installation fails on Red Hat Enterprise Linux with one of the following error messages:

Exception: Failed to solve dependencies: php-mbstring-5.4.16-23.el7_0.3.x86_64 requires php-common(x86-64) = 5.4.16-23.el7_0.3
ERROR: The Yum utility failed to install the required packages. Attention! Your software might be inoperable.

Exception: Failed to solve dependencies: php-imap-5.3.3-46.el6_6.x86_64 requires php-common(x86-64) = 5.3.3-46.el6_6php-mbstring-5.3.3-46.el6_6.x86_64 requires php-common(x86-64) = 5.3.3-46.el6_6
ERROR: The Yum utility failed to install the required packages.Attention! Your software might be inoperable.

Plesk installation requires 'codeready-builder-for-rhel-8-x86_64-rpms' OS repository to be enabled.

Cause

Optional RedHat repositories are not enabled.

Resolution

Note: To enable the Red Hat repositories, the system has to be registered according to Red Hat instructions

1. Connect to the server via SSH

2. Enable optional packages repository using the following command:

   Note: The command may result an error, but the repository will be enabled.

   • for RHEL 8:

     # subscription-manager repos --enable=codeready-builder-for-rhel-8-x86_64-rpms

   • for RHEL 7:

     # subscription-manager repos --enable=rhel-7-server-optional-rpms

   • for RHEL 6:

     # subscription-manager repos --enable=rhel-6-server-optional-rpms

3. Verify that repository has been enabled:

   # yum repolist enabled

4. Rerun Plesk installation

Additional Information

• Enabling or disabling a repository using Red Hat Subscription Management - Red Hat Customer Portal