操作方法：
连接成功
Last login: Sat Mar 25 03:04:00 2023 from 192.168.153.1
root@ubuntu:~# lvm
lvm> lvextend -l +100%FREE /dev/mapper/ubuntu-vg/ubuntu-lv
skip_dev_dir: Couldn't split up device name ubuntu-vg/ubuntu-lv.
Size of logical volume ubuntu-vg/ubuntu-lv changed from 10.00 GiB (2560 extents) to 18.22 GiB (4665 extents).
Logical volume ubuntu-vg/ubuntu-lv successfully resized.
lvm> exit
Exiting.
root@ubuntu:~# 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 = 2, new_desc_blocks = 3
The filesystem on /dev/ubuntu-vg/ubuntu-lv is now 4776960 (4k) blocks long.
