I am trying to find out how long will Ubuntu 13.04 be supported before the next version arrives.
3 Answers
The ubuntu wiki has a graph for this (see https://wiki.ubuntu.com/LTS for more information).

Ubuntu also has a 6 months cycle where new releases are release on the 4th and 10th month of the year (hence the 12.04, 12.10, 13.04, 13.10 etc).
A new LTS version is released every 2 years. In previous releases, a Long Term Support (LTS) version had 3 years support on Ubuntu (Desktop) and 5 years on Ubuntu Server. Starting with Ubuntu 12.04 LTS, both versions will receive 5 years support. There is no extra fee for the LTS version; we make our very best work available to everyone on the same free terms. Upgrades to new versions of Ubuntu are and always will be free of charge.
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According to wiki Ubuntu, 13.04 will be supported until: 2014.10 (October)
That's the official support. But Ubuntu get's a new version every 6 months. So next one after 13.04, is in October 2013, called 13.10
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13.04 is only supported until January 2014? That's unfortunate. I was hoping to skip 13.10.
Since, from 13.10, it is no longer possible to move an installation to new hardware (motherboard), I have to stick to 13.04. There are also some other annoyances in 13.10 (e.g., Nautilus).
But,if no support anymore, I may have to install 12.04. which means a major effort.
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