Here’s a video tutorial teaching the main parts of the bass line to Exodus by Bob Marley And The Wailers. The original was played by Aston Family Man Barrett.
If you’re not registered for the free members area featuring song tutorials, sight reading etudes and more…here’s where to do it: https://how-to-play-bass.com/register/free-bass-lessons1
If you’re a bass beginner….check out the only 6 things you should be practicing: https://how-to-play-bass.com/htpb50-6-things-practice
….and how you can too!
More here: https://how-to-play-bass.com/mccartney-bass