Step by Step Screenshots upgrading 12.1.0.1 to 12.1.0.2

oracle@solaris:/u01/stage/database$ export ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/dbhome_1

oracle@solaris:/u01/stage/database$ export PATH=/u01/app/oracle/product/12.1.0.2/dbhome_1/bin:/usr/bin:/usr/sbin:/usr/local/bin

oracle@solaris:/u01/stage/database$ which dbua

/u01/app/oracle/product/12.1.0.2/dbhome_1/bin/dbua

oracle@solaris:/u01/stage/database$ dbua