0 - My Oracle Support patch 6880880 (OPatch) : https://updates.oracle.com/download/6880880.html
1 - Download the Patch from oracle support
2 - Copy patches to folder where oracle dba user has access
3 - For 6880880, zip old OPatch folder in $ORACLE_HOME
4 - Shutdown oracle database server and listener
5 - For other patch, go to $ORACLE_HOME and run command : ./opatch apply <path where the patch is>/patch.zip
6 - Startup oracle database server and listener
7 - ./datapatch -verbose
8 - In sqlplus (/ as sysdba) run : @?/rdbms/admin/utlrp.sql
9 - In sqlplus, check remaining INVALID objects : select owner, count(*) count from all_objects where status = ‘INVALID’ group by owner;