One can extend the current partition to use unused space.
example: a scenario of ubuntu /dev/sda with partition /dev/sda5 having 3.92Gig UNUSED.
~$ sudo vgdisplay
[sudo] password for tperiasa:
--- Volume group ---
VG Name ub-14-vg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
......
VG Size 9.81 GiB
PE Size 4.00 MiB
Total PE 2512
Alloc PE / Size 1506 / 5.88 GiB
Free PE / Size 1006 / 3.93 GiB
VG UUID Qm1M5I-0TcK-Uoep-nxir-8Ldd-dufJ-UsQ65l
$ sudo lvdisplay
--- Logical volume ---
LV Path /dev/ub-14-vg/root
LV Name root
VG Name ub-14-vg
......
# open 1
LV Size 3.89 GiB
Current LE 995
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/ub-14-vg/swap_1
LV Name swap_1
VG Name ub-14-vg
.........
# open 2
LV Size 2.00 GiB
Current LE 511
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
sudo lvextend -L+3.92G /dev/ub-14-vg/root
Follow the above by resizing.. (NO NEED to reboot).
sudo resize2fs -p /dev/ub-14-vg/root
/dev/ub-14-vg/root is the LVPath(logical volume path), when you do a vgdisplay command it shows up:
PV[s] (Physical Volumes) -> VG[s] (Volume Groups) -> LV[s] (Logical Volumes) -> Filesystems.
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