最近在更新CentOS和安装Oracle时，总是碰到有包多版本保护，处理完成顺便记录一下。

参考链接: CentOS 7更新时出现Multilib version problems.

一、现象

错误： Multilib version problems found. This often means that the root
      cause is something else and multilib version checking is just
      pointing out that there is a problem. Eg.:
      
        1. You have an upgrade for ncurses-libs which is missing some
           dependency that another package requires. Yum is trying to
           solve this by installing an older version of ncurses-libs of the
           different architecture. If you exclude the bad architecture
           yum will tell you what the root cause is (which package
           requires what). You can try redoing the upgrade with
           --exclude ncurses-libs.otherarch ... this should give you an error
           message showing the root cause of the problem.
      
        2. You have multiple architectures of ncurses-libs installed, but
           yum can only see an upgrade for one of those architectures.
           If you don't want/need both architectures anymore then you
           can remove the one with the missing update and everything
           will work.
      
        3. You have duplicate versions of ncurses-libs installed already.
           You can use "yum check" to get yum show these errors.
      
      ...you can also use --setopt=protected_multilib=false to remove
      this checking, however this is almost never the correct thing to
      do as something else is very likely to go wrong (often causing
      much more problems).
      
      保护多库版本：ncurses-libs-5.9-14.20130511.el7_4.i686 != ncurses-libs-5.9-13.20130511.el7.x86_64

二、解决

1.查询包的名称

[root@centos7-18 database]# yum list installed ncurses-libs*
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * epel: d2lzkl7pfhq30w.cloudfront.net
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
已安装的软件包
ncurses-libs.x86_64                                                                                                   5.9-13.20130511.el7                                                                                                     @anaconda
ncurses-libs.x86_64 

2.获取包的多个版本

[root@centos7-18 database]# rpm -q ncurses-libs.x86_64
ncurses-libs-5.9-13.20130511.el7.x86_64
ncurses-libs-5.9-14.20130511.el7_4.x86_64 

3.删除不需要的版本

[root@centos7-18 database]# rpm -e ncurses-libs-5.9-13.20130511.el7.x86_64

如果遇到有依赖，可尝试升级依赖包