解決yum install時多版本衝突問題

情景

在一次進行內核漏洞修復的過程當中，部分包升級時出現以下衝突：

錯誤： 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 systemd-libs which is missing some
           dependency that another package requires. Yum is trying to
           solve this by installing an older version of systemd-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 systemd-libs.otherarch ... this should give you an error
           message showing the root cause of the problem.
      
        2. You have multiple architectures of systemd-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 systemd-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).
      
      保護多庫版本：systemd-libs-219-62.el7.x86_64 != systemd-libs-219-57.el7.i686
錯誤：保護多庫版本：libselinux-2.2.2-6.el7.i686 != libselinux-2.5-14.1.el7.x86_64

解決辦法

報錯信息很重要！！！
報錯信息很重要！！！
報錯信息很重要！！！

上述報錯信息中給出了可能致使該錯誤的緣由和解決辦法，即將多版本保護關閉便可：

yum install --setopt=protected_multilib=false  -y    包名