Check in SharePoint Document Library using PowerShell

 To  Check -in a SharePoint Document library, we can use the following power shell commands:

 

$fileName = "myFile.docx"

$myWeb = Get-SPWeb "http://mysite/testsite"

$myLib = $myWeb.GetFolder("DocLib")

$myFile = $myLib.Files | ? {$_.name -eq $fileName}

$myFile.CheckIn("Comment")

$myFile.UndoCheckOut()

$myFile.Update()