I've checked this Patch Install Procedure for Linux 64 bits on a test environment and then implemented it in RAC Development and Production environments.
This procedure is valid for 64 bits Linux, on 32 bits the step of installing the binutils rpm is not required.
On 32 bits take a look at this warning and its solution: "Many Child Cursors with 10.2.0.3 on Linux 32 bits and Windows"