Installing Ubuntu on LVM partition
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To install Ubuntu on an LVM partition after booting into installation disk use:
sudo apt-get -y install lvm2
Then use normal 'vgscan','vgchange -a y <Vol-group-name>' etc. to make the volume visible.
Steps to create LVM partition, initialize it, etc. can be learned from https://help.ubuntu.com/community/UbuntuDesktopLVM