i686과 x86_64 패키지의 차이점은 무엇입니까?

나는 glibc i686과 x86_64를 모두 갖춘 컴퓨터를 가지고 있는데 매우 짜증나는 glibc 문제가 있습니다.

한 컴퓨터에 같은 이름의 라이브러리 두 개를 설치하는 것이 정상인가요? 어떤 라이브러리가 실행되고 있는지 어떻게 알 수 있나요?

최근까지 저는 x86_64가 i686인줄 알았습니다. 알았어, 내가 착각한 게 틀림없어. 그런데 왜?

    [root@machin ~]# yum info glibc
    Loaded plugins: rhnplugin, security
    This system is not registered with RHN.
    RHN support will be disabled.
    Excluding Packages in global exclude list
    Finished
    Installed Packages
    Name       : glibc
    Arch       : i686
    Version    : 2.5
    Release    : 42
    Size       : 12 M
    Repo       : installed
    Summary    : The GNU libc libraries.
    License    : LGPL
    Description: The glibc package contains standard libraries which are used by
               : multiple programs on the system. In order to save disk space and
               : memory, as well as to make upgrading easier, common system code is
               : kept in one place and shared between programs. This particular package
               : contains the most important sets of shared libraries: the standard C
               : library and the standard math library. Without these two libraries, a
               : Linux system will not function.

    Name       : glibc
    Arch       : x86_64
    Version    : 2.5
    Release    : 42
    Size       : 11 M
    Repo       : installed
    Summary    : The GNU libc libraries.
    License    : LGPL
    Description: The glibc package contains standard libraries which are used by
               : multiple programs on the system. In order to save disk space and
               : memory, as well as to make upgrading easier, common system code is
               : kept in one place and shared between programs. This particular package
               : contains the most important sets of shared libraries: the standard C
               : library and the standard math library. Without these two libraries, a
               : Linux system will not function.

    [root@machin ~]# yum info glibc-common
    Loaded plugins: rhnplugin, security
    This system is not registered with RHN.
    RHN support will be disabled.
    Excluding Packages in global exclude list
    Finished
    Installed Packages
    Name       : glibc-common
    Arch       : x86_64
    Version    : 2.5
    Release    : 42
    Size       : 64 M
    Repo       : installed
    Summary    : Common binaries and locale data for glibc
    License    : LGPL
    Description: The glibc-common package includes common binaries for the GNU libc
               : libraries, as well as national language (locale) support.