Okay, I've looked at some of the tabs for this song, and decided to put the REAL "CORRECT" version out there. Using 5th's, there's two ways you could play this song. But the way that Johhny Cash's band plays it, is the first version I'll tab. My band plays this song a lot at gigs, and it pretty easy and gets everyone listening. So here it goes...
B=bend; P=pull off;

INTRO:
G~|————————————————————————————|
D~|———————1—1——————————————————|
A~|—2—2—2—————2————————————————|
E~|———————————————3(B)——(P)0———|

THE REST OF THE SONG!! \m/
  The hardest thing about this song is the timing. The rest of the song is played with only two strings(or could be)!
#1
G~|————————————————————————————|
D~|————————————————————————————|
A~|————————————————————————————|
E~|—0—7—0—7—0—7—0—7—0—7—0—7—0—7|

Basically playing E and it's 5th, which is B.
#2
G~|————————————————————————————|
D~|————————————————————————————|
A~|—0—7—0—7—0—7—0—7—0—7—0—7—0—7|
E~|————————————————————————————|

Same here, except were play A and it's 5th E. See the pattern. 
#3
  1st position      2nd position 
G~|—————————————|   |—————————————|
D~|—————————————|OR*|———4———4———4—|
A~|———9———9———9—|   |—2———2———2———|
E~|—7———7———7———|   |—————————————|

First one is easier for me, because I don't have to move back and fort so much on the neck.

So basically you'd play in order of: 
#1, #2, #1, then #1, #2, #3, #2
If you listen to the song and play along, you'll figure it out pretty quick. Just watch the timing.  

For more advanced players**
You could try this instead of |0—7—0—7| you would use the octave above and the lower 5th. Same notes, just a different sound. I've played it both ways just to change it up.
#1
G~|———————————————————|
D~|———————————————————|
A~|—7———7———7———7———7—|
E~|———7———7———7———7———|

Then the higher A and it's lower 5th
#2
G~|———————————————————|
D~|—7———7———7———7———7—|
A~|———7———7———7———7———|
E~|———————————————————|

And #3 would stay the same. All in the same order of course. 

So there it is. I hope that someone finds this useful so that I didn't waste an hour of my time tabbing this. ;—) Good luck and enjoy!!

About Johnny Cash

John R. "Johnny" Cash (February 26, 1932 September 12, 2003), born J. R. Cash, was an American singer-songwriter, actor, and author, who has been called one of the most influential musicians of the 20th century. Although he is primarily remembered as a country music artist, his songs and sound spanned many other genres including rockabilly and rock and rollespecially early in his careeras well as blues, folk, and gospel. Late in his career, Cash covered songs by several rock artists, among them the industrial rock band Nine Inch Nails and the synthpop band Depeche Mode.

How to Read Bass Tabs

Bass tablature (tabs) is an easy way to learn songs without needing to read traditional sheet music. Here’s a quick guide to understanding the symbols and techniques commonly found in tabs:

1. The Basics

Strings and Frets:
Each line in a tab represents a string on your bass:
- The top line is the highest-pitched string (G on a 4-string bass).
- The bottom line is the lowest-pitched string (E on a 4-string bass).
Numbers on the lines indicate which fret to press. For example:
```
G|-------------------|
D|-------------------|
A|---3---------------|
E|-------------------|
            
```
This means you play the 3rd fret on the A string.

2. Common Techniques

Hammer-On (h):
Play the first note by picking it, then press down on a higher fret with another finger without picking again.
```
G|-------------------|
D|-------5h7---------|
            
```
Pull-Off (p):
Pluck a note and then "pull off" your finger to let a lower fret ring.
```
G|-------------------|
D|-------7p5---------|
            
```
Slide (/ or \):
Move your finger up (/) or down (\) the fretboard while maintaining pressure.
```
G|-------------------|
D|-------5/7---------|
            
```

3. Advanced Techniques

Bend (b): Push the string up or down to raise the pitch. Example: G|-------7b9---------|
Vibrato (~): Shake the string slightly after playing a note to create a vibrating sound. Example: G|-------7~----------|
Muted Notes (x): Rest your finger lightly on the string without pressing a fret and pluck for a percussive "click" sound.

4. Rhythm and Timing

Tabs don’t always indicate timing, so listen to the song while reading the tab. Wider spaces between numbers mean longer pauses, while closer numbers indicate quicker notes.

5. Slap and Pop

Slap (s): Strike the string with the side of your thumb for a percussive sound.
Pop (p): Pull the string away from the fretboard and let it snap back.

Practice Makes Perfect

Tabs are a great tool to learn songs, but mastering the techniques takes practice. Listen carefully to the original track and play along to lock in the rhythm. Don’t rush — smooth, accurate playing is more important than speed. Happy jamming! 🎸

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Johnny Cash — Folsom Prison Blues (ver 6) bass tabs