保留 x 个文件并删除所有其他文件 - Powershell

问题描述

我正在尝试编写一个脚本，该脚本将查看一组文件夹并仅保留最后 10 个文件.每个文件夹中的文件可以每天、每周或每月创建.无论创建日期或修改日期如何，我都需要脚本来保留 10 个最近的副本.

使用另一篇文章，我创建了下面的脚本，但它不会保留 10 个副本，而是保留任何不超过 10 天的文件.

$ftppath = "C:\Reports"Get-ChildItem $ftppath -recurse *_Report_*.zip -force|where {$_.lastwritetime -lt (get-date).adddays(-10)} |Remove-Item -force

关于如何调整它以使其工作的任何想法?如果我使用下面的脚本，它可以工作，但前提是我没有设置 -Recurse.如果您使用 -Recurse 开关，则会出现我在脚本下方列出的错误.

# 根据创建时间保留目录中最新的 10 个文件#声明变量$path = "C:\Reports" # 例如 $path= C:\log\*.tmp$total= (ls $path).count - 10 # 将数字 5 更改为您想要保留的任意数量的对象# 脚本ls $path |sort-object -Property {$_.CreationTime} |选择对象 -first $total |Remove-Item -force

错误:选择对象:无法验证参数First"上的参数.-7 参数小于允许的最小范围 0.提供一个大于 0 的参数，然后重试该命令.

解决方案

您可以按 CreationTime 降序排序并跳过前 10 个.如果文件少于 10 个，则不会删除任何文件.

gci C:\temp\ -Recurse|where{-not $_.PsIsContainer}|排序创建时间 -desc|选择 -跳过 10|Remove-Item -Force

I am trying to write a script that will look through a set of folders and keep only the last 10 files. The files in each folder could be created daily, weekly or monthly. I need the script to keep the 10 most recent copies regardless of the creation date or modified date.

Using another post I created the script below that works but it doesnt keep 10 copies it keeps any file that isn't older than 10 days.

$ftppath = "C:\Reports"
Get-ChildItem $ftppath -recurse *_Report_*.zip -force|where {$_.lastwritetime -lt (get-date).adddays(-10)} |Remove-Item -force

Any idea on how I can tweak this to work? If I use the script below it works but only if I dont set -Recurse. If you use the -Recurse switch you get an error that I have listed below the script.

# Keeps latest 10 files from a directory based on Creation Time

#Declaration variables
$path = "C:\Reports"                               # For example $path= C:\log\*.tmp
$total= (ls $path).count - 10 # Change number 5 to whatever number of objects you want to keep
# Script
ls $path |sort-object -Property {$_.CreationTime} | Select-Object -first $total | Remove-Item -force

解决方案

You can sort by CreationTime descending and skip the first 10. If there are less than 10 files it will not remove any.

gci C:\temp\ -Recurse| where{-not $_.PsIsContainer}| sort CreationTime -desc|
    select -Skip 10| Remove-Item -Force

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