Infoprint XT utilizes the UNIX System Services environment of z/OS, and uses the z/OS UNIX shell. System administrators perform some tasks by using the z/OS UNIX shell, as do people who submit jobs through the Infoprint Server interfaces. This document describes how to access the z/OS UNIX shell through the OMVS 3270 terminal interface. For some procedures, you can also use the ISPF shell. System administrators who perform Infoprint XT administrative tasks should have familiarity with UNIX System Services and the z/OS UNIX shell. This document only includes abbreviated procedures, and provides a reference topic for some tasks. See UNIX System Services procedures.