Powershell和路径环境变量

Question

我想powershell使用环境变量"PATH"来解析可执行文件.我敢肯定它应该可以做到这一点,但这就是我得到的.

PS C:\> $PSVersionTable.PSVersion

Major  Minor  Build  Revision
-----  -----  -----  --------
4      0      -1     -1

PS C:\> ${ENV:PATH} = "C:\WINDOWS\System32\"
PS C:\> ls ${ENV:PATH}\cmd.exe


Directory: C:\WINDOWS\System32


Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---        22/08/2013   8:03 PM     355840 cmd.exe

PS C:\> & cmd.exe
& : The term 'cmd.exe' is not recognized as the name of a cmdlet, function, script file, or operable program. Check
the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:3
+ & cmd.exe
+   ~~~~~~~
+ CategoryInfo          : ObjectNotFound: (cmd.exe:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Answer 1

运行Get-Command -Type Application以查看PowerShell看到的有效可执行文件.

您可能会发现有关正在发生的事情的线索,例如所有列出的应用程序都有(或没有)某个扩展名,这可能表示PATHEXT环境变量存在问题.