The document provides an introduction to using the Linux on System z terminal server over z/VM IUCV. It discusses how IUCV terminal connections let you comfortably manage Linux instances even in emergencies. It describes how to establish IUCV terminal sessions using programs like iucvconn and iucvtty, how to set up an IUCV terminal environment on target systems using devices like HVC terminals, and how the terminal shell ts-shell can help authorize users and audit terminal sessions.