PowerShell supports many different command categories and searches for the command in the following order:
1. Alias
2. Function
3. Cmdlet
4. Executable
5. Script
6. Associated Files
This enables you to override existing commands. For example, if you define an alias named ping, you would no longer have access to ping.exe when you simply type in ping:
Set-Alias ping notepad.exe
ping 10.10.10.10
However, you could still call the original ping.exe command when you specify its extension:
ping.exe 10.10.10.10
To list all conflicting commands, use this:
Get-Command -type cmdlet,function,alias | Group-Object name | Where-Object { $_.Count -gt 1 } | ForEach-Object { $_.Group }