今天给家里的旧笔记本装Ubuntu Server，安装过程中它本来是240GB的固态硬盘，结果实际系统只分配了100GB，为了防止后续用完的时候再分配可能把数据玩没，尽早调整一下。

先看看目前分区挂载的状态

shrewd@x200:~$ df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              382M  1.6M  381M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv   98G   12G   82G  12% /
tmpfs                              1.9G   16K  1.9G   1% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G  127M  1.7G   7% /boot
tmpfs                              382M  4.0K  382M   1% /run/user/1000

可以看到根目录就只有98G

看一下现在盘的分区是个什么情况

shrewd@x200:~$ sudo fdisk -l
Disk /dev/sda: 223.57 GiB, 240057409536 bytes, 468862128 sectors
Disk model: Lenovo-LS510-2.5
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: 962A17FB-79F5-418D-AF75-AF88D78952D1

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 468858879 464660480 221.6G Linux filesystem

选择你要调整的硬盘并输入print查看硬盘信息

shrewd@x200:~$ sudo parted /dev/sda
GNU Parted 3.4
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print                                                            
Model: ATA Lenovo-LS510-2.5 (scsi)
Disk /dev/sda: 240GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name  Flags
 1      1049kB  2097kB  1049kB                     bios_grub
 2      2097kB  2150MB  2147MB  ext4
 3      2150MB  240GB   238GB

刚发现如果文件系统是LVM的就不是在这里调整。我的是在这里，如下

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

最后调整要修改的逻辑分区

shrewd@x200:~$ sudo parted /dev/mapper/ubuntu--vg-ubuntu--lv
GNU Parted 3.4
Using /dev/mapper/ubuntu--vg-ubuntu--lv
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 107GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End    Size   File system  Flags
 1      0.00B  107GB  107GB  ext4
(parted) resizepart 2

Warning: /dev/mapper/ubuntu--vg-ubuntu--lv is being used. Are you sure you want to continue?
Yes/No? yes
End? [107GB]? 129GB
(parted) q