Adding Swap

[Quantum]

I have installed F17 into a VirtualBox VM, and would like to add another swap.

I know it should be as easy as mkswap /dev/??, but I don't know what partitions are available in my virtual machine. How do I find out? I can't make sense out of fdisk output. It has /dev/sda and then /dev/mapper devices, I guess because I have an encrypted disk, but don't understand them and for some reason the fdisk output copied to clipboard on guest will not transfer to host.

Anyone advise?

[jpollard]

The VM doesn't use X when communicating with the host, so cut/past can't work.

I put it in a file and use scp to copy it. I also use ssh to log into the box from which I can use X for cut/past and windows from the VM.

Fdisk should list the partitions known. The /dev/mapper are virtual disks/partitions composed of partitions already existing.

In my case, things show up as:

# fdisk -l

Disk /dev/vda: 17.2 GB, 17179869184 bytes
16 heads, 63 sectors/track, 33288 cylinders, total 33554432 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0001a906

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048     1026047      512000   83  Linux
/dev/vda2         1026048     9414655     4194304   82  Linux swap / Solaris
/dev/vda3         9414656    33554431    12069888   83  Linux

I get vda from using xen with only one disk defined.

Adding swap (if you want a new disk) has to be done via the virtualbox control to define it. Otherwise you are just creating a swap file, which can be put on any mounted disk. And yes, the filesystem it is on must be mounted before it can be added as a swap device.

[Quantum]

Oh for Heaven's sake, create a new disk. Thank you.

Now according to swapon -s I have the new swap drive. To make this permanent I guess I have to edit fstab? Like this?
UUID="{whatever}" swap swap defaults 0 0

With selinux, is there anything I have to do there?