ubuntu24.04安装完以后发现硬盘空间少一半

1、查看现在硬盘情况

root@ubuntu:~# df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              1.6G  1.1M  1.6G   1% /run
efivarfs                           256K   64K  188K  26% /sys/firmware/efi/efivars
/dev/mapper/ubuntu--vg-ubuntu--lv  48G   6.4G  39G   15% /
tmpfs                              7.9G     0  7.9G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G   96M  1.7G   6% /boot
/dev/sda1                          1.1G  6.2M  1.1G   1% /boot/efi
tmpfs                              1.6G   12K  1.6G   1% /run/user/0

安装时给了100G的空间，现在只使用了50G，剩下的还处于空间状态。

2、通过 vgdisplay 查看一下具体剩余空间

root@ubuntu:~# 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               <96.95 GiB
  PE Size               4.00 MiB
  Total PE              24818
  Alloc PE / Size       12409 / 48.47 GiB
  Free  PE / Size       12409 / 48.47 GiB
  VG UUID               O814Hq-CEoa-S0E4-Vl40-bNre-XJV4-cOdaSv

红色文字部分，显示剩余空间：48.47G

3、将全部剩余空间扩容给逻辑卷

root@ubuntu:~# lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
  Size of logical volume ubuntu-vg/ubuntu-lv changed from 48.47 GiB (12409 extents) to <96.95 GiB (24818 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.

root@ubuntu:~# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.47.0 (5-Feb-2023)
Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required
old_desc_blocks = 7, new_desc_blocks = 13
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 25413632 (4k) blocks long.

4、查看扩容后的新空间情况

root@ubuntu:~# df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              1.6G  1.1M  1.6G   1% /run
efivarfs                           256K   64K  188K  26% /sys/firmware/efi/efivars
/dev/mapper/ubuntu--vg-ubuntu--lv  96G   6.4G   85G   8% /
tmpfs                              7.9G     0  7.9G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G   96M  1.7G   6% /boot
/dev/sda1                          1.1G  6.2M  1.1G   1% /boot/efi
tmpfs                              1.6G   12K  1.6G   1% /run/user/0