在几个月 (> 6) 没有软件升级后，我登录到运行的 EC2 实例：
Linux version 2.6.32-358.23.2.el6.x86_64 (mockbuild@x86-022.build.eng.bos.redhat.com) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Sat Sep 14 05:32:37 EDT 2013
然后尝试执行通常的 yum-update：
# yum update
好吧，失败了，错误如下：
--> Finished Dependency Resolution
Error: Package: coreutils-libs-8.4-19.el6_4.2.x86_64 (@rhui-us-east-1-rhel-server-releases)
Requires: coreutils = 8.4-19.el6_4.2
Removing: coreutils-8.4-19.el6_4.2.x86_64 (@rhui-us-east-1-rhel-server-releases)
coreutils = 8.4-19.el6_4.2
Updated By: coreutils-8.4-31.el6_5.1.x86_64 (rhui-REGION-rhel-server-releases)
coreutils = 8.4-31.el6_5.1
Available: coreutils-8.4-9.el6.x86_64 (rhui-REGION-rhel-server-releases)
coreutils = 8.4-9.el6
Available: coreutils-8.4-13.el6.x86_64 (rhui-REGION-rhel-server-releases)
coreutils = 8.4-13.el6
Available: coreutils-8.4-16.el6.x86_64 (rhui-REGION-rhel-server-releases)
coreutils = 8.4-16.el6
Available: coreutils-8.4-19.el6.x86_64 (rhui-REGION-rhel-server-releases)
coreutils …