With CheckSystem you can monitor the free space of one or more harddisk drives or partitions. Also, you can monitor directories, so that it worked like a disk quota. If the drive or directory reach a defined limit, CheckSystem sends an alert e-mail to an user defined address. The event log monitor sends you the new entries by mail if they are written in the log. The Dr. Watson monitor fetchs Watson errors and send you a detailed error report if an error occured. That helps you to locate the problem and prevent it for the future. With the application monitor you can check if a specified program is running. If not, you can execute it. If it runs, you can terminate it. The CPU usage monitor controls the CPUs and perform an action when it breaks a limit. The service monitor checks if a service is running. The file monitor controls the file properties and the http monitor checks when your website is on or off error. With help of TCP/IP connection monitor, you can check if a specified computer is available in or outside your network (i.e. your webserver).The HTML Report engine creates tidy and clearly arranged html files with all CheckSystem results. All monitors have a single e-mail or Direct Message notification. With that and the Mail-To-SMS gateway of your provider, CheckSystem can send all warnings on your cell-phone. Because of these and all the other functions, CheckSystem is the best tool for system administrators who need to be kept informed about their systems.