For ease of use with SQL*Plus, create a parent folder above this one on your OS, and set that folder as your default startup folder for SQL*Plus. You may wish to create the following file in this top-level folder which has some useful prompt and display column formatting.

Oracle 9i and 10g Parent Folder Script(s)
Generic prompt and display columns script

Oracle 9i and 10g Space and Storage Scripts
Column definitions, used by all scripts
Clear column definitions, used by all scripts
Coalesce tablespaces
Database fragmentation
Tablespace storage allocations
Extent fragmentation
Tablespace free space
Table storage allocations
Table storage allocations (user)
Tablespace contents
Tablespace contents (user)