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Boot Ubuntu.
Install lvm2:
$ sudo apt-get install lvm2
Load the necessary module(s):
$ sudo modprobe dm-mod
Scan your system for LVM volumes and identify in the output the volume
group name that has your Fedora volume (mine proved to be VolGroup00):
$ sudo vgscan
Activate the volume:
$ sudo vgchange -ay VolGroup00
Find the logical volume that has your Fedora root filesystem (mine
proved to be LogVol00):
$ sudo lvs
Create a mount point for that volume:
$ sudo mkdir /mnt/fcroot
Mount it:
$ sudo mount /dev/VolGroup00/LogVol00 /mnt/fcroot -o ro,user
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