aumentare estendere linux ubuntu server logical system memory

 Ah after disk expansion you just need to expand all the logical parts on the disk to match.

sda3 is already resized so just expand the LVM parts:

BASH

# Increase the Physical Volume (pv) to max size
pvresize /dev/sda3

# Expand the Logical Volume (LV) to max size to match
lvresize -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv

# Expand the filesystem itself
resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv

Double check the path name in /dev/mapper it may be slightly different than how I typed it out. The double-dash has special meaning in LVM names and don't always show up on disk in /dev that way.

After you run the first command, it'll increase the PV from 200 to 800 GB which is immediately made available to the Volume Group (VG) that the LV is part of.

It's always a 4-part thing: disk partition -> PV -> VG -> LV