Checking up Intel assembly opcodes easily in Linux

Question

I have been looking for an practical tool that would print the opcodes of any Intel 64-bit or 32-bit instruction in Linux, eg. something like Hiew\'s assembler in DOS. A web

Answer 1

Disassemblers, like libdisasm and udis86 usually come with a lookup table for opcodes.

udis86 also comes with a command line tool (udcli), which you feed hex bytes and it gives you the decoded version.