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I know that questions about why Xubuntu LTS has 3 years support and straight Ubuntu LTS has 5 years.

What I am wondering is that what this has meant in the past is that I have used straight Ubuntu LTS and downloaded the Xfce desktop from the repository. This in theory should give me the 5 years support from vanilla Ubuntu, but how is that different from Xubuntu? Why would anybody sacrifice 2 years of support for the official Xubuntu distribution rather than simply download an Xfce desktop on a vanilla Ubuntu?

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    Everything from the 'main' repository has 5 years of support, you cannot load xubuntu-desktop (or anything xfce) from 'main' as it comes from 'universe' (community supported), so those packages are not supported with the five years of support (only packages from 'main'. Downloading Xubuntu does include packages with 5 years of support, but it's ALL covered by 3 years of LTS support (why they say 3 years instead of complicating it with some with 5 years, others only 3). – guiverc Mar 9 at 3:17
  • help.ubuntu.com/community/Repositories/Ubuntu. The moment you add PPA's you've made your system more complex (you do the security checks for PPAs yourself, and have to check your support completely yourself as some have no support). The initial 'full-support' guarantee applies only to what's on the install-media (which may differ the moment you starting adding new sources). – guiverc Mar 9 at 3:20
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Everything from the 'main' repository has 5 years of support, you cannot load xubuntu-desktop (or any other desktop) from 'main' as it comes from 'universe' (community supported), so those packages are not supported with the five years of support.

Downloading Xubuntu does include packages with 5 years of support, but it's ALL covered by 3 years of LTS support (only some packages have the longer support life). We know parts have longer support, but it's a potential risk to use a system only partially supported, so it's safer to treat is as a 3 year fully-supported product (as advertized).

Refer to https://help.ubuntu.com/community/Repositories/Ubuntu for information on repositories & software-sources.

The moment you add PPA's you've made your system more complex (you do the security checks for PPAs yourself, and have to check your support completely yourself as some have no support).

The initial 'full-support' guarantee applies only to what's on the install-media (which may differ the moment you starting adding new sources). Ubuntu has 5 years of support for everything on install media, where as flavors have the shorter (usually 3 years) support.

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