i run Health Check/Validation for "Oracle E-Business Suite Release 12 (12.1.1) Preinstall (Linux x86 and x86_64)"

im getting following errors :

1.Some of the required software tools for the the application tier of Oracle E-Business Suite Release 12 (12.1.1) installation were not found. Check your installation.
linux32 is not in /usr/bin as required. ( how to resolve ?? )

2.i added search fgho.com in /etc/resolve.conf but still getting error message( The DNS server failed to resolve the nslookup using host.domain.)

3.i set hard nproc 16384 but getting error message ( Increase the limit for maximum processes to 16384 or higher.)

4.i set kernel.msgmnb = 65536 but getting error message (Increase the limit for file descriptors to 65536 or higher.)