I've developed a Plymouth Theme and realized I could probably test without rebooting the computer every time.
I discovered 'plymouth show-splash' is suppose to achieve this, but executing that command results in nothing. No error. No success message. No splash screen.
I expected that when I executed this command the Plymouth Theme would take over my screen and appear for X seconds and then disappear.
I'm unable to locate any articles on this topic anywhere. Can someone shed light? Explain why this is happening? Thank you.