Linux installations leaving behind 4 GB swap partitions

Blackened Justice · 06-21-2011, 07:49 AM

I've installed some Linux distributions over the past few weeks, and I've recently noticed that previous installations of Linux have left my hard drive cluttered with numerous 4 GB swap partitions. I've since deleted them, but is there any way to avoid this a priori in the future?

sycamorex · 06-21-2011, 08:05 AM

Please note that you don't need a separate swap partition for each linux distro. It can be shared by systems. For example, If you dual/triple boot, there's no need to create more than 1 swap filesystem:
eg.

/dev/sda1 Slackware
/dev/sda2 SWAP
/dev/sda3 Debian
/dev/sda4 Arch

Each distro can utilise /dev/sda2 as swap filesystem
I hope it makes sense.

Blackened Justice · 06-21-2011, 10:44 AM

I'm not installing simultaneous OSs, I install a distribution and then when I install the next one, I choose to install over the current one.

sycamorex · 06-21-2011, 11:06 AM

Quote:

Originally Posted by Blackened Justice

I'm not installing simultaneous OSs, I install a distribution and then when I install the next one, I choose to install over the current one.

That's fine. It was just an example. Just make sure you don't CREATE a new swap partition each time you install a new distro. Use the one that you created during the previous installation.

Blackened Justice · 06-21-2011, 11:17 AM

Quote:

Originally Posted by sycamorex

That's fine. It was just an example. Just make sure you don't CREATE a new swap partition each time you install a new distro. Use the one that you created during the previous installation.

Hmm, how can I control if the installation will or won't create a new swap partition? Do I have to select custom partition options instead of just selecting the overwrite option? Shouldn't the overwrite option use the existing partition by default?

michaelk · 06-21-2011, 11:19 AM

It depends on the distribution and the options available during the installation. The manual/custom partition option will allow one to create and assign partitions as desired and use the same swap. If you select automatically create partitions the installer may not search for or use existing partitions.

sycamorex · 06-21-2011, 11:30 AM

I always do manual setup, but I'm surprised that the automatic option doesn't always detect the existing swap system.

Blackened Justice · 06-21-2011, 11:38 AM

Okay, thank you for the explanation, I'll do a manual installation next time

Cheers

smoker · 06-21-2011, 05:17 PM

You don't have to do a manual install. Most automatic installs will give you the option to check the partition layout before proceeding. Do it, and delete any existing swap before the install starts.

Blackened Justice · 06-22-2011, 10:42 AM

Well, I had to reinstall Mint and this time chose the custom partitions option. I think I did everything well, my partitions are nice and tidy as they should be

Cheers

Willrandship · 06-22-2011, 10:35 PM

Just make sure you have swap partitions set to mount to the "swap" option, or you'll have to do "sudo swapon sda*" every time you boot. I learned that the hard way. Nothing a simple startup bash scripting can't handle, but still an unnecessary pain.

michaelk · 06-23-2011, 04:04 AM

Willrandship,
No need for a startup script, just add the appropriate line to your /etc/fstab.

Willrandship · 06-23-2011, 11:03 AM

not an issue anymore anyways, since that particular distro is now gone, thanks to a horrible GRUB-related mistake :P but it's nice to learn new things. I'll keep that in mind.