yum update 时遇到的问题

yum update 遇到的问题
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提示无法升级libtar，但是yum list libtar可以看到有可用包，用如下方法升级。
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--> Finished Dependency Resolution
Error: Package: libreport-plugin-reportuploader-2.0.9-15.el6.x86_64 (@rhel-x86_64-server-6-201303.01)
           Requires: libtar.so.1()(64bit)
           Removing: libtar-1.2.11-17.el6.x86_64 (@anaconda-RedHatEnterpriseLinux-201206132210.x86_64/6.3)
               libtar.so.1()(64bit)
           Updated By: libtar-1.2.11-17.el6_4.1.i686 (rhel-x86_64-optional-6)
               Not found
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1. 安装yum utility 包，提供 yumdownloader 命令
# yum install yum-utils

2. 使用yumdownloader下载无法升级的包，--resolve 分析依赖性并下载被依赖的包，本例下载了zlib。
# yumdownloader libtar.i686 --destdir=/tmp --resolve
Loaded plugins: product-id
--> Running transaction check
---> Package libtar.i686 0:1.2.11-17.el6_4.1 will be installed
--> Processing Dependency: libz.so.1 for package: libtar-1.2.11-17.el6_4.1.i686
--> Running transaction check
---> Package zlib.i686 0:1.2.3-29.el6 will be installed
--> Finished Dependency Resolution
libtar-1.2.11-17.el6_4.1.i686.rpm                                                                     |  30 kB     00:00    
zlib-1.2.3-29.el6.i686.rpm

3. 先安装依赖包，然后安装需要升级的包。
# rpm -ivh zlib-1.2.3-29.el6.i686.rpm
# rpm -ivh libtar-1.2.11-17.el6_4.1.i686.rpm

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Yyum update 时提示冲突: conflict
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Transaction Check Error:
  file /usr/share/doc/hponcfg/readme.txt from install of hponcfg-4.2.0-0.x86_64 conflicts with file from package hponcfg-4.1.0-0.noarch

Error Summary
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1. 先卸载冲突的包，本例是hponcfg
# yum remove hponcfg

2. 重新安装
# yum install hponcfg

3. 重新update
# yum update