查看“︁Ubuntu扩展磁盘空间”︁的源代码

== 问题 ==
hyper-v最初建立ubuntu虚拟机的时候分配的磁盘空间不够想安装东西报错，需要扩容，学着上面链接的作业对ubuntu下复制粘贴问题解决

== 解决 ==

=== hyper-v下 ===

# 关闭虚拟机电源，
# 编辑虚拟机磁盘
# 点击扩展，
# 输入扩展后大小，然后完成。

=== 虚拟机内 ===
和和他的需求一样直接抄一下把<syntaxhighlight lang="linux-config">
检查
longqiping@ubuntu:~$ df /tmp
Filesystem                        1K-blocks     Used Available Use% Mounted on
/dev/mapper/ubuntu--vg-ubuntu--lv  65019484 62892356         0 100% /
发现/tmp所在的/即ubuntu--vg-ubuntu--lv的空间没有了。
查看lvm卷组的信息
root@ubuntu:/home/longqiping# 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               <126.50 GiB
  PE Size               4.00 MiB
  Total PE              32383
  Alloc PE / Size       16192 / 63.25 GiB
  Free  PE / Size       16191 / <63.25 GiB
  VG UUID               8cak6E-4fZv-kGgq-lsOA-9FHC-Ju7R-kn2RJy
 
 解决
使用命令进行磁盘扩容
lvextend -L 10G /dev/mapper/ubuntu--vg-ubuntu--lv      //增大或减小至19G
lvextend -L +10G /dev/mapper/ubuntu--vg-ubuntu--lv     //增加10G
lvreduce -L -10G /dev/mapper/ubuntu--vg-ubuntu--lv     //减小10G
lvresize -l  +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv   //按百分比扩
使用如下命令，将/tmp增加60G
root@ubuntu:/home/longqiping# lvresize -L +60G /dev/mapper/ubuntu--vg-ubuntu--lv
  Size of logical volume ubuntu-vg/ubuntu-lv changed from 63.25 GiB (16192 extents) to 123.25 GiB (31552 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.
扩容
root@ubuntu:/home/longqiping# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.45.5 (07-Jan-2020)
Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required
old_desc_blocks = 8, new_desc_blocks = 16
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 32309248 (4k) blocks long.
看看效果
root@ubuntu:/home/longqiping# vgdisplay
  --- Volume group ---
  VG Name               ubuntu-vg
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  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               <126.50 GiB
  PE Size               4.00 MiB
  Total PE              32383
  Alloc PE / Size       31552 / 123.25 GiB
  Free  PE / Size       831 / <3.25 GiB
  VG UUID               8cak6E-4fZv-kGgq-lsOA-9FHC-Ju7R-kn2RJy
   
root@ubuntu:/home/longqiping# df -h
Filesystem                         Size  Used Avail Use% Mounted on
udev                                16G     0   16G   0% /dev
tmpfs                              3.2G  1.5M  3.2G   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv  122G   61G   56G  52% /
tmpfs                               16G     0   16G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
tmpfs                               16G     0   16G   0% /sys/fs/cgroup
/dev/vda2                          976M  396M  514M  44% /boot
/dev/loop0                          49M   49M     0 100% /snap/core18/1883
/dev/vda1                          511M  3.5M  508M   1% /boot/efi
/dev/loop1                          49M   49M     0 100% /snap/core18/1990
/dev/loop2                          27M   27M     0 100% /snap/snapd/11043
/dev/loop3                          29M   29M     0 100% /snap/snapd/11115
/dev/loop5                          62M   62M     0 100% /snap/lxd/19206
/dev/loop4                          63M   63M     0 100% /snap/lxd/19648
tmpfs                              3.2G     0  3.2G   0% /run/user/1000

</syntaxhighlight>[https://zhuanlan.zhihu.com/p/359959580 抄自]
[[分类:Ubuntu]]
[[分类:Hyper-v]]