Is LibreOffice 4.0 coming to Ubuntu 12.10 as an update? If so when?
There is no Deb package to upgrade that one can just double click to install LO 4.0. The present instructions given on some websites are quite complicated.
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LibreOffice 4.0 is a major release, and hence may not be available in Ubuntu 12.10 via Software Updater (reason already mentioned by @vasa1 in a comment to your question, I'd recommend to read this answer of the same thread).
But if you're still interested in installing LO 4.0 in your box, WebUp8's Guide should get that done (and I don't think process explained there is that complicated). ;-)
And if its still complex for you, let's make it easier FTW. Here you go.
If you're using any previous versions of LO4 (Beta, RC, etc.) Better you follow up the link I've provided above ('cause you're already brave then). If not, do as follows.
.debinstaller (technically, it'll be a
.tararchive) for your version of Ubuntu here.
homefolder and create a new folder called
libreofficeand put that TAR file in here. Now open terminal using short-cut Ctrl+Alt+T and navigate to
libreofficefolder by running command
tar xvf libreoffice_downloaded_file.tar(be sure to replace with actual file name you've downloaded.
sudo dpkg -i *.deb. It'll ask for password and once installation is done, exit terminal and look for LibreOffice 4 apps in Unity Dash.