在更新 PHP 版本的时候，出现了NOKEY的错误提示后，暂时没有解决掉这个问题，于是就手动安装了php-mbstring...rpm 包的高版本，这样在接下来的错作中就出现了错误信息：The program package-cleanup is found in the yum-utils package.
什么是yum-utils:
yum-utils are tools for manipulating repositories and extended package management. It is a collection of tools and programs for managing yum repositories, installing debug packages, source packages, extended information from repositories and administration.
yum-utils package includes:
debuginfo-install - install debuginfo packages and their dependencies
package-cleanup - manage package cleanup, duplicates, orphaned packages and outstanding dependency problems
repo-graph - outputs a full package dependency list in dot format
repo-rss - generates an RSS feed from one or more repositories
repoclosure - reads metadata of repositories, checks dependencies and displays list of unresolved dependencies
repodiff - takes two or more repositories, returns a list of added, removed or changed packages
repomanage - manages a directory of rpm packages, returns a list of newest or oldest packages in a directory
repoquery - query yum repositories and get additional information on the them
reposync - synchronize a remote yum repository to a local directory using yum to retrieve packages
repotrack - track packages and its dependencies and downloads them
yum-builddep - installs missing dependencies to build a specified package
yum-complete-transaction - finds incomplete or aborted yum transactions and attempts to complete them
yum-installed - print a compact package list making use of comps groups
yumdownloader - downloads packages from yum repositories including source RPMs
出现这句话说明清除程序包存在并在yum-utils套件包里找到了，看不出安装存在问题。存在不兼容问题的话一般是用yum安装一些rpm packages时候会出现missing dependency error，会有error提示的。
解决办法：
yum install yum-utils
yum-complete-transaction --cleanup-only
清除可能存在的重复包
package-cleanup --dupes
清除可能存在的损坏包
package-cleanup --problems
清除重复包的老版本：
package-cleanup --cleandupes
package-cleanup 帮助信息如下：
options:
-h, --help show this help message and exit
--problems List dependency problems in the local RPM database
--leaves List leaf nodes in the local RPM database
--all When listing leaf nodes also list leaf nodes that do
not match leaf-regex
--leaf-regex=LEAF_REGEX
A package name that matches this regular expression
(case insensitively) is a leaf
--exclude-devel When listing leaf nodes do not list development
packages
--exclude-bin When listing leaf nodes do not list packages with
files in bin dirs
--orphans List installed packages which are not available from
currenly configured repositories.
-q, --quiet Print out nothing unecessary
-y Agree to anything asked
-d, --dupes Scan for duplicates in your rpmdb
--cleandupes Scan for duplicates in your rpmdb and cleans out the
older versions
--oldkernels Remove old kernel and kernel-devel packages
--count=KERNELCOUNT Number of kernel packages to keep on the system
(default 2)
--keepdevel Do not remove kernel-devel packages when removing
kernels
-c CONFFILE config file location
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