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→Reducing filesystem size
It's quite difficult to unmount <code>/home</code> -- you must be logged in non-graphically as root. It's even harder to umount <code>/</code> -- you have to boot from another disk, such as a live disc or the rescue mode of the installation disc.
If a system is installed with all of the VG space in use, it will be necessary to add a PV or reduce the size of an LV in order to add any more LVs or to grow one of the existing LVs. '''It's therefore a much better idea to create small LVs initially, leaving some unused space in the VG which can be assigned as needed'''.
