[Oracle DataBase Server 12.1 installation on Oracle Linux 6.7 with ASM and GRID]: Creating folder structure for Oracle

# mkdir -p /u01/oracle/database/12.1
# mkdir -p /u01/oracle/grid/12.1

# chown -R oracle12:oinstall /u01/oracle
# chmod -R 775 /u01/oracle

# mkdir -p /u01/oraInventory
# chown -R oracle12:oinstall /u01/oraInventory
# chmod -R 775 /u01/oraInventory