创建

pvcreate /dev/sda4
vgcreate vg-linux /dev/sda4 
vgdisolay vg-linux

lvcreate -L 10G vg-linux -n lv-home
lvcreate -L 10G vg-linux -n lv-root
lvcreate -l +100%FREE vg-linux -n lv-data

lvdisplay
lsblk

mkfs.ext4 /dev/vg-linux/lv-home
mkfs.ext4 /dev/vg-linux/lv-root
mkfs.ext4 /dev/vg-linux/lv-data

删除

lvchange -an /dev/vg-linux/lv-home
lvchange -an /dev/vg-linux/lv-root
lvchange -an /dev/vg-linux/lv-data
lvremove /dev/vg-linux/lv-home
lvremove /dev/vg-linux/lv-root
lvremove /dev/vg-linux/lv-data
vgremove /dev/vg-linux
pvremove /dev/sda4

Extend space

use vgdisplay <thevgname> to display the volume name and details. There you can see VG size (total size), Allocated (used) and Free space. The free space hints on how much you could expand your partition.

sudo vgdisplay
  --- Volume group ---
  VG Name               ubuntu-vg
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <928.46 GiB
  PE Size               4.00 MiB
  Total PE              237685
  Alloc PE / Size       25600 / 100.00 GiB
  Free  PE / Size       212085 / <828.46 GiB
  VG UUID               64593D-HLgd-bEGf-Fodu-dXjQ-5G6W-0QbGK4

sudo lvdisplay
  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/ubuntu-lv
  LV Name                ubuntu-lv
  VG Name                ubuntu-vg
  LV UUID                AcvIuI-xQ60-nddK-1T9Q-4hQq-V4Cw-H1rFpK
  LV Write Access        read/write
  LV Creation host, time ubuntu-server, 2024-05-08 07:21:53 +0000
  LV Status              available
  # open                 1
  LV Size                100.00 GiB
  Current LE             25600
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

use lvextend -L +2G /thename/of/filesystem to extend the size the partition. In this example it was increased by 2Gb... edit this part according to your needs.

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

use resize2fs /thename/of/filesystem to actually expand the used space.

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 = 117
The filesystem on /dev/ubuntu-vg/ubuntu-lv is now 243389440 (4k) blocks long.