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ワンライナー集
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Windows 10 でディレクトリ容量を計算する
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```console
$totalsize=[long]0;gci -File -r -fo -ea Silent|%{$totalsize+=$_.Length};$totalsize
```
ソース: [How can I check the size of a folder from the Windows command line?](https://superuser.com/questions/837016/how-can-i-check-the-size-of-a-folder-from-the-windows-command-line)