Name of the last installed kernel, for Red Hat based systems.

    Returns:
            List with name of last installed kernel as it is interpreted in output of `uname -a` command.

def _kernel_versions_redhat():
    '''
    Name of the last installed kernel, for Red Hat based systems.

    Returns:
            List with name of last installed kernel as it is interpreted in output of `uname -a` command.
    '''
    kernel_get_last = __salt__['cmd.run']('rpm -q --last kernel')
    kernels = []
    kernel_versions = []
    for line in kernel_get_last.splitlines():
        if 'kernel-' in line:
            kernels.append(line)

    kernel = kernels[0].split(' ', 1)[0]
    kernel = kernel.strip('kernel-')
    kernel_versions.append(kernel)

    return kernel_versions