The Get-ChildItem command without any options will list the files and directories in the present working directory.

> Get-ChildItem

    Directory: C:\Users\john.doe

Mode                LastWriteTime         Length Name                                                                                                                    
----                -------------         ------ ----                                                                                                                                                                                                                              
d-----        3/26/2021   4:02 AM                foo                                                                                                                     
-a---l        3/26/2021   4:02 AM                bar.txt

The -recurse flag can be used to list the files and directories below the present working directory.

> Get-ChildItem -recurse

Sometimes, permission denied will be returned at certain sub directories. The -erroraction silentlycontinue option can be used to ignore such errors.

> Get-ChildItem -recurse -erroraction silentlycontinue

The -path option can be used to specify the base directory to search from.

> Get-ChildItem -path C:\ -recurse

The -file flag can be used to only display files.

> Get-ChildItem -file