Create an cluster on Linux, have not to be complicated and expensive. This book gives you an assistance for the cross-computer RAID1-System DRBD, build by LinBit, and helps you to create your special own cluster system. In form of 'Listings' - practicle example-sessions, which can have bugs, error messages and debugging - the author shows, how you can use step by step DRBD, to create an easy and functionable Linux-Cluster. Because the DRBD-Software and the configuration files are also usable on Windows, the shown examples can also run on this system! In an own chapter it will be shown, how DRBD involes into an Veritas-Cluster. Useful information for the system administration of Linux systems will be given in three appendices. The operation of the various Linux file systems is also explained.