在testing的VirtualBox服务器上，使用RHEL 6 DVD进行全新安装：
[root@bt-rhel6-1 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.1 (Santiago) 我确定它是一个x86_64机器：
[root@bt-rhel6-1 ~]# uname -a Linux bt-rhel6-1.local 2.6.32-131.0.15.el6.x86_64 #1 SMP Tue May 10 15:42:40 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
并没有安装其他i686软件包：
[root@bt-rhel6-1 ~]# rpm -qa | grep i686 [root@bt-rhel6-1 ~]# rpm -qa | grep x86_64 | wc -l 331
但是当我做yum update ：
[root@bt-rhel6-1 ~]# yum update 2>&1 | grep i686 ---> Package libselinux.i686 0:2.0.94-5.el6 will be installed --> Processing Dependency: libdl.so.2(GLIBC_2.1) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libdl.so.2(GLIBC_2.0) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libdl.so.2 for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.8) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.4) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.3.4) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.3) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.2.4) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.2.3) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.2) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.1.3) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.1.2) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.1) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6(GLIBC_2.0) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: libc.so.6 for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: ld-linux.so.2(GLIBC_2.3) for package: libselinux-2.0.94-5.el6.i686 --> Processing Dependency: ld-linux.so.2 for package: libselinux-2.0.94-5.el6.i686 ---> Package glibc.i686 0:2.12-1.47.el6_2.5 will be installed --> Processing Dependency: libfreebl3.so(NSSRAWHASH_3.12.3) for package: glibc-2.12-1.47.el6_2.5.i686 --> Processing Dependency: libfreebl3.so for package: glibc-2.12-1.47.el6_2.5.i686 ---> Package nss-softokn-freebl.i686 0:3.12.9-11.el6 will be installed Error: Protected multilib versions: libselinux-2.0.94-5.2.el6.x86_64 != libselinux-2.0.94-5.el6.i686
这里是我的知识库：
[root@bt-rhel6-1 ~]# yum repolist Loaded plugins: product-id, rhnplugin, subscription-manager Updating Red Hat repositories. repo id repo name status epel Extra Packages for Enterprise Linux 6 - x86_64 6,893 rhel-x86_64-server-6 Red Hat Enterprise Linux Server (v. 6 for 64-bit x86_64) 6,806 repolist: 13,699
是什么赋予了？
这是由于selinux-ruby包的错误。
@Mark推荐的yum -v update命令帮助我弄清楚了这一点。 我能够通过手动安装一个较新的软件包来解决这个问题，一切都很好。