Differences between i386, i8.0, i586, and i686 in linux

Differences between i386, i386, i586, and i686 in linux-Linux general technology-Linux technology and application information. For more information, see the following. I386, i8.0, and i586 are packages compiled for 80386, 808.0, and 80586 respectively. i686 has been widely used. Since p2, x86 processors have entered the p6 architecture era and are all p6 architectures. The cpu of the new architecture is backward compatible with the software packages compiled in the old architecture.

What is the difference between i386.rpm and i686.rpm?

Although the x86 architecture has the same commands, the specific implementation of different times still has its own characteristics in terms of compilation optimization. In addition, the later generation usually has more commands, so during RPM compilation, different compilation options can be optimized for different architectures.

Generally, all x86 processors can execute 386 instruction sets.
80486 processor needs 486 Optimization of course
Pentium is 586
PentiumPro (P6) is collectively referred to as 686, including PentiumPro, PentiumII, PentiumIII and P4

For efficiency considerations, when compiling software packages such as the core and glibc, they all compile different packages for different architectures. During installation, select the one suitable for your machine to achieve the best efficiency.

Currently, as long as there are 686 packages, you don't have to consider 386 of the packages.