ORA-12547: TNS:lost contact

I get this error while installing Oracle 10g R2 on Redhat Enterprise Linux 5. So I install the following package and problem resolved:
libaio-0.3.105-2.i386.rpm

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Download it from : http://rpm.pbone.net/index.php3/stat/4/idpl/5184007/com/libaio-0.3.105-2.i386.rpm.html