How does Ubiquity determine the required disk space before installation?





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This question intends to demystify Ubiquity the desktop installer for Ubuntu, on how the required disk space before installation is being determined.



From this dated post Determining size of the partition when using Ubuntu Installer:




[When installing] Ubuntu 12.04 alongside with Windows 7 using the Ubuntu installer, [the user] wasn't able to give Ubuntu less than 32 GB [...] and as the guide states, "Ubuntu needs about 4.5 GB to install, so add a few extra GB to allow for your files".




The required disk space was previously about 5 GB (Ubuntu 12.04), 8 GB (Ubuntu 16.04), and has since increased to 25 GB (Ubuntu 18.04), as per minimum system requirements. In practice, the absolute minimum for required disk space may differ by installation media and machine.



The design spec via Ubiquity on Ubuntu Wiki describes the installer mockup and nothing else about how the required disk space is determined (top half screenshot).



Ubiquity design spec and using in practice



I have clarified that Ubuntu 16.04 will require at least 8 GB disk space only on a physical machine, but the minimum changes to 8.3 GB when installing to a virtual machine (bottom half screenshot).



So how does Ubiquity determine the required disk space?










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  • The link to "design spec" is using URL shortener, so I have included link to the parent page only (Ubiquity on Ubuntu Wiki). Given that there is no "share" button on Google Docs, not sure whether quoting the direct link to the documentation is ethical or not.

    – clearkimura
    4 mins ago


















0















This question intends to demystify Ubiquity the desktop installer for Ubuntu, on how the required disk space before installation is being determined.



From this dated post Determining size of the partition when using Ubuntu Installer:




[When installing] Ubuntu 12.04 alongside with Windows 7 using the Ubuntu installer, [the user] wasn't able to give Ubuntu less than 32 GB [...] and as the guide states, "Ubuntu needs about 4.5 GB to install, so add a few extra GB to allow for your files".




The required disk space was previously about 5 GB (Ubuntu 12.04), 8 GB (Ubuntu 16.04), and has since increased to 25 GB (Ubuntu 18.04), as per minimum system requirements. In practice, the absolute minimum for required disk space may differ by installation media and machine.



The design spec via Ubiquity on Ubuntu Wiki describes the installer mockup and nothing else about how the required disk space is determined (top half screenshot).



Ubiquity design spec and using in practice



I have clarified that Ubuntu 16.04 will require at least 8 GB disk space only on a physical machine, but the minimum changes to 8.3 GB when installing to a virtual machine (bottom half screenshot).



So how does Ubiquity determine the required disk space?










share|improve this question























  • The link to "design spec" is using URL shortener, so I have included link to the parent page only (Ubiquity on Ubuntu Wiki). Given that there is no "share" button on Google Docs, not sure whether quoting the direct link to the documentation is ethical or not.

    – clearkimura
    4 mins ago














0












0








0








This question intends to demystify Ubiquity the desktop installer for Ubuntu, on how the required disk space before installation is being determined.



From this dated post Determining size of the partition when using Ubuntu Installer:




[When installing] Ubuntu 12.04 alongside with Windows 7 using the Ubuntu installer, [the user] wasn't able to give Ubuntu less than 32 GB [...] and as the guide states, "Ubuntu needs about 4.5 GB to install, so add a few extra GB to allow for your files".




The required disk space was previously about 5 GB (Ubuntu 12.04), 8 GB (Ubuntu 16.04), and has since increased to 25 GB (Ubuntu 18.04), as per minimum system requirements. In practice, the absolute minimum for required disk space may differ by installation media and machine.



The design spec via Ubiquity on Ubuntu Wiki describes the installer mockup and nothing else about how the required disk space is determined (top half screenshot).



Ubiquity design spec and using in practice



I have clarified that Ubuntu 16.04 will require at least 8 GB disk space only on a physical machine, but the minimum changes to 8.3 GB when installing to a virtual machine (bottom half screenshot).



So how does Ubiquity determine the required disk space?










share|improve this question














This question intends to demystify Ubiquity the desktop installer for Ubuntu, on how the required disk space before installation is being determined.



From this dated post Determining size of the partition when using Ubuntu Installer:




[When installing] Ubuntu 12.04 alongside with Windows 7 using the Ubuntu installer, [the user] wasn't able to give Ubuntu less than 32 GB [...] and as the guide states, "Ubuntu needs about 4.5 GB to install, so add a few extra GB to allow for your files".




The required disk space was previously about 5 GB (Ubuntu 12.04), 8 GB (Ubuntu 16.04), and has since increased to 25 GB (Ubuntu 18.04), as per minimum system requirements. In practice, the absolute minimum for required disk space may differ by installation media and machine.



The design spec via Ubiquity on Ubuntu Wiki describes the installer mockup and nothing else about how the required disk space is determined (top half screenshot).



Ubiquity design spec and using in practice



I have clarified that Ubuntu 16.04 will require at least 8 GB disk space only on a physical machine, but the minimum changes to 8.3 GB when installing to a virtual machine (bottom half screenshot).



So how does Ubiquity determine the required disk space?







system-installation ubiquity documentation system-requirements






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asked 10 mins ago









clearkimuraclearkimura

4,34321958




4,34321958













  • The link to "design spec" is using URL shortener, so I have included link to the parent page only (Ubiquity on Ubuntu Wiki). Given that there is no "share" button on Google Docs, not sure whether quoting the direct link to the documentation is ethical or not.

    – clearkimura
    4 mins ago



















  • The link to "design spec" is using URL shortener, so I have included link to the parent page only (Ubiquity on Ubuntu Wiki). Given that there is no "share" button on Google Docs, not sure whether quoting the direct link to the documentation is ethical or not.

    – clearkimura
    4 mins ago

















The link to "design spec" is using URL shortener, so I have included link to the parent page only (Ubiquity on Ubuntu Wiki). Given that there is no "share" button on Google Docs, not sure whether quoting the direct link to the documentation is ethical or not.

– clearkimura
4 mins ago





The link to "design spec" is using URL shortener, so I have included link to the parent page only (Ubiquity on Ubuntu Wiki). Given that there is no "share" button on Google Docs, not sure whether quoting the direct link to the documentation is ethical or not.

– clearkimura
4 mins ago










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