Cool PowerShell for SharePoint Online – Start Here

More from PowerShell 101

SharePoint PowerShell
http://powershell101.blogspot.com/2012/09/sharepoint-powershell.html

More from The Cloud Engineer

Cool PowerShell for SharePoint – Start Here
https://thecloudengineer.blogspot.com/2016/10/cool-powershell-for-sharepoint-start.html

General SharePoint PowerShell Page – old
http://thecloudengineer.blogspot.com/2011/11/sharepoint-powershell.html

SharePoint Online Library

Disable Alerts

http://www.sharepointdiary.com/2017/11/sharepoint-online-disable-alerts-using-powershell.html

https://www.sharepointpals.com/post/how-to-disable-enable-user-alerts-in-sharepoint-office-365-using-csom-powershell/

http://sharepoint-tricks.com/install-update-uninstall-cmdlets-for-sharepoint-online