This depends on the platform you're using. On Fedora and RHEL 9, the default runtime is crun. On RHEL 7 and RHEL 8, the default is runc. In any case they can be

This depends on the platform you're using. On Fedora and RHEL 9, the default runtime is crun. On RHEL 7 and RHEL 8, the default is runc. In any case they can be swapped as needed. https://github.com/containers/crun https://github.com/containers/crun