Powershell Study, my common command

Study powershell step by step.

CMD#01. Retrieve only items in the PSDrive that are not directories.
GCI C:\ | where {!$_.psiscontainer}

CMD#02. List all of the WMI Namespace

$wmi = Get-WmiObject -class __Namespace -namespace root
$wmi | format-table name
write-host -foregroundcolor green "There are " $wmi.length `
" namespaces on this machine `n"

CMD#03. Browse WMI classes on a computer

$objLocator = New-Object -ComObject "Wbemscripting.swbemlocator"

$objWMIService = $objLocator.ConnectServer(".", "\root\cimv2", "", "", "", "", "0")

$colItems = $objWMIService.SubclassesOf()

foreach ($objItem In $colItems)
{
    $objItem.path_.class
}

CMD#04. Query with WMI

$strComputer = "."
$wmiNS = "root\cimv2"
$wmiQuery = "select name from win32_share"

$objWMIServices = get-wmiobject -computer $strComputer -namespace $wmiNS -query $wmiQuery
$objWMIServices | sort -property name | format-table -property name

CMD#05. Retrieve a listing of all commands typed during a Windows PowerShell session

get-history, or h

CMD#06. select-string, examines all files in the subdirectories of C:\Windows\System32 with the .txt file name extension and searches for the string "Microsoft".

get-childitem c:\windows\system32\* -include *.txt -recurse | select-string -pattern "Microsoft" -casesensitive