Installing the oracle database software could bring you the following error:
./runInstaller: /u01/insta/database/install/.oui: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory
Which indicates that 32bit version of libs are missing. At least two possible reasons for that, some 32 bit libs are really missing and we could start digging into the cause or ask your self a question, what we are trying to achieve here? Are we trying to install 32bit software on 64bit linux by mistake?
The 64bit software distribution will have 64 in the name of the zip, like:
If there is NO 64 in the naming, then most likely you are installing 32 bit on 64 bit linux.