如何使用 parted 编写自动任务脚本（更新 gpt 表）

Question

我想在我的 Debian 9.9 上编写现有分区的扩展脚本。

我可以通过 parted 的交互模式简单地做到这一点，但我想自动化它。在下面的示例中，我只需要手动编写“修复”，但我想编写脚本。

root@localhost:~# parted -l
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/backup: 38.9GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End     Size    File system  Flags
 1      0.00B  38.9GB  38.9GB  xfs


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/data: 38.9GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End     Size    File system  Flags
 1      0.00B  38.9GB  38.9GB  xfs


Warning: Not all of the space available to /dev/vda appears to be used, you can
fix the GPT to use all of the space (an extra 20971520 blocks) or continue with
the current setting? 
Fix/Ignore?                    

我想知道当我输入“Fix”时执行了哪个命令。据我了解，这可能只是 GPT 表的重新加载，所以我尝试执行命令 partprobe：

root@localhost:~# partprobe 
Warning: Not all of the space available to /dev/vda appears to be used, you can fix the GPT to use all of the space (an extra 20971520 blocks) or continue with the current setting? 
root@localhost:~# 

但这里没有提出任何选项。我查看了 parted 的帮助，有一个“脚本模式”，我尝试了以下方法，但没有成功：

root@localhost:~# parted -s /dev/vda print Fix
Warning: Not all of the space available to /dev/vda appears to be used, you can fix the GPT to use all of the space (an extra 20971520 blocks) or continue with the current setting? 
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 118GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name  Flags
 1      17.4kB  1018kB  1000kB                     bios_grub
 2      1018kB  451MB   450MB   ext3
 3      451MB   10.5GB  10.0GB  xfs
 8      29.6GB  107GB   77.8GB

Usage: parted [OPTION]... [DEVICE [COMMAND [PARAMETERS]...]...]
Apply COMMANDs with PARAMETERS to DEVICE.  If no COMMAND(s) are given, run in
interactive mode.

OPTIONs:
  -h, --help                      displays this help message
  -l, --list                      lists partition layout on all block devices
  -m, --machine                   displays machine parseable output
  -s, --script                    never prompts for user intervention
  -v, --version                   displays the version
  -a, --align=[none|cyl|min|opt]  alignment for new partitions

COMMANDs:
  align-check TYPE N                        check partition N for TYPE(min|opt) alignment
  help [COMMAND]                           print general help, or help on COMMAND
[...]

我也试过这个 bash 脚本：

#!/bin/bash
(echo Fix; echo print list; echo quit) | parted /dev/vda print free

但它没有用，我也试过这个但它没有帮助：

**root@localhost:~# cat /tmp/2.sh** 

select /dev/vda
print 
Fix

然后通过管道将其导入parted：

parted < /tmp/2.sh

Answer 1

我找到了一个解决方案，使用'sgdisk'而不是parted，它看起来更方便编写脚本。就我而言，“sgdisk /dev/vda -e”成功了

Answer 2

printf "fix\n" | parted ---pretend-input-tty /dev/vda print