Prevent LiveCD using existing swap partition

Question

I have an existing installation with a swap partition, and I want to boot a Ubuntu 10.04 Desktop LiveCD without using the swap partition. I want to avoid using the swap partition so that I can resize it and other partitions.

score 9 · Accepted Answer · answered Oct 21 '10 at 13:08

9

If you're using an Ubuntu Live CD, you can disable the use of the swap partition trough the Partition Editor (GParted) by right-clicking the swap partition, and selecting swapoff.

This should allow to to resize the partition.

answered Oct 21 '10 at 13:08

alexanderpas

271

I thought there would be a boot option, but this is certainly good enough for what I need. – Liam Oct 22 '10 at 12:26

score 2 · Answer 2 · answered Oct 21 '10 at 09:57

2

You can add noswap to the grub parameters to achieve this.

But it's usually easier to let the Live CD boot normally and then in a console type:

sudo swapoff device

Where device is the file or partition of the swap.

answered Oct 21 '10 at 09:57

Javier Rivera

35,153

I tried adding noswap and --noswap to the boot options (accessed by pressing F6 at the livecd menu). Neither worked, System Monitor still shows the swap as enabled. – Liam Oct 21 '10 at 10:38
Have you tried the swapoff method? – Javier Rivera Oct 21 '10 at 11:40

score 1 · Answer 3 · answered Oct 21 '10 at 09:57

1

If the live CD uses swap you can disable it with swapoff command. Swap is also not required to install Ubuntu, but recommended.

answered Oct 21 '10 at 09:57

Paweł Nadolski

1,556

invert · Answer 4 · 2010-10-22T08:54:01.880

-1

I was wrong, and the Live CD does use an existing swap partition. There is no noswap cheat code listed (I tried the noswap cheat code anyway, but the swap was still used).

I'm stumped on how to prevent using swap at boot time, but for repartitioning purposes the other posters suggested how to turn the swap off.

ubuntu@ubuntu:~$ swapon -s
Filename    Type        Size     Used   Priority
/dev/sda5   partition   225272   0      -1

edited Oct 22 '10 at 08:54

answered Oct 21 '10 at 13:24

invert

721

The Live CD does use available swap partitions, but your swap is on an encrypted partition, and it's impossible to recognize it as a swap partition before initializing the encrypted partition, which doesn't happen by default. – JanC Oct 21 '10 at 16:35
@JanC point noted, thanks. I'll need to setup an unencrypted VM to test this again. – invert Oct 22 '10 at 07:37
I think support for the noswap option is turned on or off at the kernel compile time (I can't remember where I read that), so it may be available in some Linux distros and not others. – Liam Oct 22 '10 at 12:29

Prevent LiveCD using existing swap partition

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