What is Logical Volume Manager? This is great explanation in english https://en.wikipedia.org/wiki/Logical_Volume_Manager_(Linux), this most using practical commanns https://opensource.com/business/16/9/linux-users-guide-lvm and also this is greatest and more details explanation in russian https://help.ubuntu.ru/wiki/lvm.
Below I show some more examples for practical using LVM. I want to write big file to my Ubuntu Virtual Machine and need expand free space from 50GB to 150GB. I have use LVM future for this purpose - this is alternative solution for simple add additional partition and mount it to something mount point.
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