If you're using Red Hat Enterprise Linux 3, you may need to assemble your code with the Gnu Assembler (commonly known as "as"). In this guide, we'll show you how to use as effectively in Red Hat Enterprise Linux 3, including how to pass arguments, reference symbols, and more. By the end of this guide, you should be able to use the Gnu Assembler confidently to compile and execute your code in Red Hat Enterprise Linux 3.