Lists all the instances that are available on a system.
On UNIX based systems, this utility is located in the DB2DIR/bin directory, where DB2DIR represents /usr/lpp/db2_05_00 on AIX, and /opt/IBMdb2/V5.0 on both Solaris and HP-UX. On OS/2 or the Windows operating system, it is located in the \sqllib\bin subdirectory.
For a complete description of this command, see the Administration Guide.