What is the difference between swap entries in fstab?

5

3

I've been looking around and seen two different things ways to declare swap in fstab.

I've seen something like the line below:

UUID=UUID-HERE none swap sw 0 0

and

UUID=UUID-HERE none swap swap 0 0`

What, if anything, is the difference?

Rob

Posted 2011-09-19T15:25:01.117

Reputation: 2 152

Answers

8

When the filesystem type is swap, neither of these options mean anything. In fact, the only option that makes sense is pri=n, specifying the swap space priority. Usually you don't need it and can just specify defaults:

UUID=foo   none   swap   defaults

(The mount point, as well as dump and pass fields, are irrelevant too.)

user1686

Posted 2011-09-19T15:25:01.117

Reputation: 283 655

1Thanks, I figured mount dump and pass were irrelevant. I hadn't seen it as defaults before, but I have since I was searching after asking the question. – Rob – 2011-09-19T18:16:17.193