Скачать или смотреть Windows Powershell. Поиск дубликатов файлов. Finding dublicate files

dir d:\program -recurse
dir d:\program -recurse | group extension
dir d:\Programm -recurse | group extension | sort count -Descending
dir d:\Programm -recurse *.txt | ft fullname
dir d:\Programm -recurse *.txt | sort count -Descending
$txt = dir d:\Programm -recurse *.txt
$txt | group name | ?{$_.count -gt 1} | sort count -Descending
$txt | group name | ?{$_.count -gt 1} | sort count -Descending | select -last 2
$txt | group name | ?{$_.count -gt 1} | sort count -Descending | select -last 2 | %{$_.group.fullname}
$hash = $txt | %{Get-FileHash $_.fullname}
$hash | group hash | ?{$_.count -gt 1} | sort count -Descending
$hash | group hash | ?{$_.count -gt 1} | sort count -Descending | select -f 2 | %{$_.group.path}
$measure = $txt | measure -property length -sum -minimum -maximum -average
$measure.sum/1mb
$hash | group hash | ?{$_.count -gt 1} | sort count -Descending | select -f 2 | %{$_.group.path} | out-file c:\temp\report -encodig unicode