PowerShell 是一个跨平台的 (Windows, Linux 和 OS X) 自动化和配置工具（框架），可以和已有的工具友好集成，特别优化用于处理结构化数据 (如 JSON, CSV, XML 等), REST APIs 以及对象模型。它包含一个命令行 Shell、一个关联的脚本语言以及一个用于处理 cmdlets 的框架。
PowerShell 就相当于 Linux 下的 Bash 以及 SHELL 脚本编程语言。
PowerShell 与 Bash 的对别：
| Bash | PowerShell | Description |
|---|---|---|
| ls | dir, Get-ChildItem | List files and folders |
| tree | dir -Recurse | List all files and folders |
| cd | cd, Set-Location | Change directory |
| pwd | pwd, $pwd, Get-Location | Show working directory |
| clear, Ctrl+L, reset | cls, clear | Clear screen |
| mkdir | New-Item -ItemType Directory | Create a new folder |
| touch test.txt | New-Item -Path test.txt | Create a new empty file |
| cat test1.txt test2.txt | Get-Content test1.txt, test2.txt | Display files contents |
| cp ./source.txt ./dest/dest.txt | Copy-Item source.txt dest/dest.txt | Copy a file |
| cp -r ./source ./dest | Copy-Item ./source ./dest -Recurse | Recursively copy from one folder to another |
| mv ./source.txt ./dest/dest.txt | Move-Item ./source.txt ./dest/dest.txt | Move a file to other folder |
| rm test.txt | Remove-Item test.txt | Delete a file |
| rm -r <folderName> | Remove-Item <folderName> -Recurse | Delete a folder |
| find -name build* | Get-ChildItem build* -Recurse | Find a file or folder starting with 'build' |
| grep -Rin "sometext" --include="*.cs" | Get-ChildItem -Recurse -Filter *.cs | Select-String -Pattern "sometext" |
Recursively case-insensitive search for text in files |
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