PowerShell执行which命令报错：‘which’未被识别为有效命令，如何解决？

Hey there! I’ve dealt with this exact frustration before—PowerShell doesn’t come with the which command built-in like Unix-based shells (Bash, Zsh, etc.) do. No worries though, there are a few easy ways to get the same functionality:

• Use PowerShell’s native Get-Command (or its alias gcm)
  This is the official PowerShell replacement for which. To find the path of a command, run:

  Get-Command xxxxxx
  

  Or use the shorter alias for quicker typing:

  gcm xxxxxx
  

  If you only want to see the raw executable file path (and skip extra metadata), pipe the output to narrow it down:

  gcm xxxxxx | Select-Object -ExpandProperty Source
  

  You can also filter results to only show applications (ignoring scripts or aliases) with:

  gcm xxxxxx -CommandType Application
  

• Create a custom which function (to keep using the familiar syntax)
  If you’d rather stick with typing which like you do in Unix shells, you can add a simple function to your PowerShell profile. Here’s how:

  1. Open your PowerShell profile file with:

     notepad $PROFILE
     

     (If the file doesn’t exist, run New-Item -Path $PROFILE -ItemType File first to create it.)
  2. Paste this function into the file:

     function which {
         Get-Command -Name $args[0] -ErrorAction SilentlyContinue | Select-Object -ExpandProperty Source
     }
     

  3. Save the file, then restart PowerShell or run . $PROFILE to load the changes right away. Now you can run which xxxxxx just like you’re used to!

• Use Windows’ built-in where.exe
  Windows has its own native tool for locating executable files, which works almost exactly like which. Run:

  where.exe xxxxxx
  

  This will return the full path of any matching executable in your system’s PATH variable.

The root cause of that error is straightforward: which isn’t a native PowerShell cmdlet—it’s exclusive to Unix-like environments. All the options above give you the same (or better) functionality directly in PowerShell.

内容的提问来源于stack exchange，提问作者wtian