Step by step – Oracle 12c R2 Database Ubuntu 21.04 Installation

Making Directories & Setting Permissions

5. 5. Making Directories

   Next Make Target Directories
   So execute:

   sudo mkdir -p /u01/app/oracle/product/12/dbhome_1

   Again Setup Ownership:

   sudo chown -R oracle:oinstall /u01

   And Permissions over it:

   sudo chmod -R 775 /u01

   Finally, Set also the temporary DB Ownership:

   sudo chown -R oracle:oinstall /tmp/database