Windchill installation with Oracle Database 11g fails on Red Hat Enterprise Linux with the error "uname: command not found" Windchill PDMLink

• Windchill installation with Oracle Database 11g fails on Red Hat Enterprise Linux with the error "uname: command not found"
• PTC Solution Installer failed while Loading database schema with "Error during Schema Creation" 
• OCU logs error :

standard output:  
output: /app/oracle/product/11.2.0/dbhome_1/bin/dbca: line 118: /u01/app/oracle/product/11.2.0/dbhome_2/bin/platform_common: No such file or directory
exit code: 1 
DEBUG   - checkStreams: product_log_file_name = OCU_PtcInstall.log 
DEBUG   - checkStreams: ia_product_log_file_name = OCU_InstallLog.xml 
DEBUG   - --- Start: com.ptc.windchill.ocu.install.SearchErrors @ 805957335 ----- 
DEBUG   - Product install dir is /u01/ptc/Windchill_11.0/ocu. 
DEBUG   - Fixing up variable arrays... 
DEBUG   - Done fixing up variable arrays. 
DEBUG   - CHOSEN_INSTALL_SET=Custom 
DEBUG   - CHOSEN_INSTALL_FEATURE_LIST=createDB,createSCHEMA 
DEBUG   - Setting variable WC.validationFailed=null. 
DEBUG   - Setting variable OCU_EXECUTE_ERROR=1. 
DEBUG   - Result for validator com.ptc.windchill.ocu.install.SearchErrors is: failure.  Generated no messages. 
DEBUG   - Setting variable WC.validationFailed=1. 
DEBUG   - Error during validation 
DEBUG   - Exiting with return code -1 
DEBUG   - Installation Aborting 
DEBUG   - The following 2 logs contain information that may be useful for diagnosing installation problems. Include them in your support requests.  Shutdown the installer before accessing any logs to ensure that they are up to date. 
DEBUG   -  - /ptc/Windchill_11.0/ocu/installer/logs/OCU_PtcInstall.log 
DEBUG   -  - /ptc/Windchill_11.0/ocu/installer/logs/OCU_InstallLog.xml 
DEBUG   - Error during validation

• PSI Graphical user interface Error :