fdisk -l

Disk /dev/sda: 400 GiB, 429496729600 bytes, 838860800 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 0588156E-1871-4A3D-900F-4C8C2758E02E

Device Start End Sectors Size Type
/dev/sda1 2048 4095 2048 1M BIOS boot
/dev/sda2 4096 4198399 4194304 2G Linux filesystem
/dev/sda3 4198400 838860766 834662367 398G Linux filesystem

Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 100 GiB, 107374182400 bytes, 209715200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

df -h

Filesystem Size Used Avail Use% Mounted on
tmpfs 6,2G 1,2M 6,2G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 98G 89G 4,2G 96% /
tmpfs 31G 4,0K 31G 1% /dev/shm
tmpfs 5,0M 0 5,0M 0% /run/lock

sudo pvdisplay

--- Physical volume ---
PV Name /dev/sda3
VG Name ubuntu-vg
PV Size <398,00 GiB / not usable 16,50 KiB
Allocatable yes
PE Size 4,00 MiB
Total PE 101887
Free PE 76287
Allocated PE 25600
PV UUID kJRjOE-1iPT-CVJQ-7QyB-c8I2-ndQQ-Uzi9VE

pvresize /dev/sda3

Physical volume "/dev/sda3" changed
1 physical volume(s) resized or updated / 0 physical volume(s) not resize

sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv

Size of logical volume ubuntu-vg/ubuntu-lv changed from 100,00 GiB (25600 extents) to <398,00 GiB (101887 extents).
Logical volume ubuntu-vg/ubuntu-lv successfully resized.

sudo lvdisplay

--- Logical volume ---
LV Path /dev/ubuntu-vg/ubuntu-lv
LV Name ubuntu-lv
VG Name ubuntu-vg
LV UUID l8Obv4-PXVy-VEsm-db9B-5yZ8-Ybmi-010JO9
LV Write Access read/write
LV Creation host, time ubuntu-server, 2024-02-08 09:41:27 +0000
LV Status available
# open 1
LV Size <398,00 GiB
Current LE 101887
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0

sudo resize2fs /dev/ubuntu-vg/ubuntu-lv

resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/ubuntu-vg/ubuntu-lv is mounted on /; on-line resizing required
old_desc_blocks = 13, new_desc_blocks = 50
The filesystem on /dev/ubuntu-vg/ubuntu-lv is now 104332288 (4k) blocks long.

df -h

Filesystem Size Used Avail Use% Mounted on
tmpfs 6,2G 1,2M 6,2G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 392G 89G 286G 24% /
tmpfs 31G 4,0K 31G 1% /dev/shm
tmpfs 5,0M 0 5,0M 0% /run/lock