$ mkdir powershell_tut

PS> New-Item -ItemType "directory" powershell_tut

$ cd powershell_tut

PS> Set-Location powershell_tut

$ touch a.txt

PS> New-Item a.txt

$ cp a.txt b.txt
$ cp -r dir_a dir_b

PS> Copy-Item a.txt b.txt
PS> Copy-Item -Recurse dir_a dir_b

$ rm a.txt
$ rm -r dir_a
$ rm -rf dir_b

PS> Remove-Item a.txt
PS> Remove-Item -Recurse dir_a
PS> Remove-Item -Recurse -Force dir_b

$ mv dir_b dir_c

PS> Move-Item dir_b dir_c

$ ls

PS> Get-ChildItem

$ man cp

PS> Get-Help Copy-Item

$ curl http://example.com

PS> Invoke-RestMethod -Uri http://example.com