https://edelivery.oracle.com/osdc/faces/SoftwareDelivery

https://docs.oracle.com/en/database/oracle/oracle-database/19/ladbi/optimal-flexible-architecture-file-path-examples.html#GUID-BB3EE4F7-50F4-4A2D-8A0D-96B7CC44029B

• /
  • Root directory
• /u01/
  • User data mount point 1
• /u01/app/
  • Subtree for application software
• /u01/app/oraInventory
  • Central OraInventory directory
• /u01/app/oracle/
  • Oracle base directory for user oracle.
  • There can be many Oracle Database installations on a server, and many Oracle Database software installation owners.
• /u01/app/grid
  • Oracle base directory for user grid.
  • The Oracle home (Grid home) for Oracle Grid Infrastructure for a cluster installation is located outside of the Grid user.
  • There can be only one Grid home on a server, and only one Grid software installation owner.
  • The Grid home contains log files and other administrative files
• /u02/app/oracle/oradata , /u03/app/oracle/oradata, /u04/app/oracle/oradata
  • Oracle data file directories
• /u01/app/oracle/product/19.0.0/dbhome_1
  • Oracle home directory for Oracle Database 1, owned by Oracle Database installation owner account oracle
• /u01/app/19.0.0/grid
  • Oracle home directory for Oracle Grid Infrastructure for a cluster (Grid home),
  • owned by user grid before installation, and owned by root after installation
• /u01/app/oracle/product/19.0.0/client_1
  • Oracle home directory for Oracle Database Client 1,
  • owned by Oracle Database installation owner account oracle

• /u02, /u03, and /u04
  • The database files are distributed across these three mount points