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I've got a Laptop with 1 HDD and 1 SSD. On the SSD is both, Windows and Ubuntu, installed. Now I want to move my /home folder to the HDD on a seperate partition. How much space do I have to give the OS on the SSD? What changes the size of the OS? That's where I'm quite unsure. I don't want too much space wasted.

Thanks (:

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    This question has already been answered here. – WhoElse Jul 29 '15 at 18:44
  • @WhoElse Please flag next time question as a duplicate. – Pilot6 Jul 29 '15 at 18:49
  • It's not the same. It's about the same topic, yes, but I've got an other question. I know HOW but I want to know how MUCH for the OS. – L1nuxUs3r Jul 29 '15 at 20:12
  • possible duplicate of Question regarding dual booting Ubuntu and Windows 7 – karel Jul 30 '15 at 4:47
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There is no one-size-fits-all answer for this.

You can easily determine the size of the OS as it is now using the df and du commands. The real question however is how much more space are you going to use in the future for the OS ?

The size of the OS grows by packages you install and, to a lesser extent, by updates of already installed packages. In the 'Software Updater' or 'Software Centre' you can set up the update behaviour (automatic or manual).

So it all depends on what you plan to install additionally.

To create some more space for the OS you can remove some files:

  • Downloaded packages are kept in /var/cache/apt/archives and can be removed using sudo apt-get clean.
  • Kernel updates end up in /boot and older kernels must be removed manually (they are never removed automatically).
  • If space becomes a problem you can always move some directories of the OS from the SSD to your HDD and then softlink them back (ln -s).

If you move your home drive from the SSD to the HDD, then there will be more space left for the OS. The home drive is often the biggest hogger of disk space. This might solve your problem already, at least partially.

My OS is also on an SSD (160GB) and occupies 140GB. My home drive is on a separate 240GB HDD and occupies 60GB.

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