在一台新的 centOS 6.5 服务器上，想要运行 MySQL 客户端，却被告之无法识别。
本文介绍如何只安装 MySQL 客户端。

8.x 的安装过程

MySQL 下载 ：https://dev.mysql.com/downloads/mysql/

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# 卸载自带的 mariadb
rpm -e redhat-lsb-core-4.1-27.el7.centos.1.x86_64
rpm -e postfix-2:2.10.1-9.el7.x86_64
rpm -e mariadb-libs-5.5.68-1.el7.x86_64

# rpm -qa | grep mariadb 查看，有则操作 rpm -e，如果提示有前置依赖，按照提示先卸载前置依赖即可

# 安装必要的依赖
yum install -y openssl-devel perl net-tools libaio

# 安装解压好的 rpm 包
# wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.11-1.el7.x86_64.rpm-bundle.tar
# tar -xvf mysql-8.0.11-1.el7.x86_64.rpm-bundle.tar
rpm -ivh mysql-community-common-8.0.11-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.11-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.11-1.el7.x86_64.rpm

以下是5.7的安装详细过程

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# mysql
-bash: mysql: command not found

检查是否已经安装 mysql

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# find / -name mysql
/usr/lib64/mysql
/usr/share/mysql
[root@jstukte7a334ry mysql]# cd /usr/lib64/mysql/
[root@jstukte7a334ry mysql]# ll
total 3108
lrwxrwxrwx. 1 root root      26 Aug 14  2014 libmysqlclient_r.so.16 -> libmysqlclient_r.so.16.0.0
-rwxr-xr-x. 1 root root 1595240 Feb 13  2014 libmysqlclient_r.so.16.0.0
lrwxrwxrwx. 1 root root      24 Aug 14  2014 libmysqlclient.so.16 -> libmysqlclient.so.16.0.0
-rwxr-xr-x. 1 root root 1584680 Feb 13  2014 libmysqlclient.so.16.0.0
[root@jstukte7a334ry mysql]# cd /usr/share/mysql/
[root@jstukte7a334ry mysql]# ll
total 96
drwxr-xr-x. 2 root root 4096 Aug 14  2014 charsets
drwxr-xr-x. 2 root root 4096 Aug 14  2014 czech
drwxr-xr-x. 2 root root 4096 Aug 14  2014 danish
drwxr-xr-x. 2 root root 4096 Aug 14  2014 dutch
drwxr-xr-x. 2 root root 4096 Aug 14  2014 english
drwxr-xr-x. 2 root root 4096 Aug 14  2014 estonian
drwxr-xr-x. 2 root root 4096 Aug 14  2014 french
drwxr-xr-x. 2 root root 4096 Aug 14  2014 german
drwxr-xr-x. 2 root root 4096 Aug 14  2014 greek
drwxr-xr-x. 2 root root 4096 Aug 14  2014 hungarian
drwxr-xr-x. 2 root root 4096 Aug 14  2014 italian
drwxr-xr-x. 2 root root 4096 Aug 14  2014 japanese
drwxr-xr-x. 2 root root 4096 Aug 14  2014 korean
drwxr-xr-x. 2 root root 4096 Aug 14  2014 norwegian
drwxr-xr-x. 2 root root 4096 Aug 14  2014 norwegian-ny
drwxr-xr-x. 2 root root 4096 Aug 14  2014 polish
drwxr-xr-x. 2 root root 4096 Aug 14  2014 portuguese
drwxr-xr-x. 2 root root 4096 Aug 14  2014 romanian
drwxr-xr-x. 2 root root 4096 Aug 14  2014 russian
drwxr-xr-x. 2 root root 4096 Aug 14  2014 serbian
drwxr-xr-x. 2 root root 4096 Aug 14  2014 slovak
drwxr-xr-x. 2 root root 4096 Aug 14  2014 spanish
drwxr-xr-x. 2 root root 4096 Aug 14  2014 swedish
drwxr-xr-x. 2 root root 4096 Aug 14  2014 ukrainian
[root@jstukte7a334ry mysql]# service mysqld status
mysqld: unrecognized service
[root@jstukte7a334ry mysql]# service mysql status 
mysql: unrecognized service
[root@jstukte7a334ry mysql]# cd /etc/init.d/
[root@jstukte7a334ry init.d]# ll
total 256
-rwxr-xr-x. 1 root root  1288 Nov 23  2013 abrt-ccpp
-rwxr-xr-x. 1 root root  1628 Nov 23  2013 abrtd
-rwxr-xr-x. 1 root root  1642 Nov 23  2013 abrt-oops
-rwxr-xr-x. 1 root root  1725 Aug 19  2010 acpid
-rwxr-xr-x  1 root root  2265 Jun 28  2016 aegis
-r-xr-xr-x  1 root root  3726 Jun  2  2015 agentwatch
-rwxrwxrwx  1 root root  3864 Jul  5  2016 ali_auditd_srv
-rwxr-xr-x. 1 root root  2062 Jan 30  2012 atd
-rwxr-xr-x. 1 root root  3378 May 28  2014 auditd
-r-xr-xr-x. 1 root root  1340 Nov 24  2013 blk-availability
-rwxr-xr-x. 1 root root 11355 Aug 13  2013 cpuspeed
-rwxr-xr-x. 1 root root  2826 Nov 23  2013 crond
-rw-r--r--. 1 root root 19175 Jul 10  2014 functions
-rwxr-xr-x. 1 root root  1801 Jul 20  2011 haldaemon
-rwxr-xr-x. 1 root root  5866 Oct 10  2013 halt
-rwxr-xr-x. 1 root root 10804 Nov 23  2013 ip6tables
-rwxr-xr-x. 1 root root 10688 Nov 23  2013 iptables
-rwxr-xr-x. 1 root root  1938 May  5  2014 irqbalance
-rwxr-xr-x. 1 root root 18133 Nov 23  2013 kdump
-rwxr-xr-x. 1 root root   652 Oct 10  2013 killall
-r-xr-xr-x. 1 root root  2134 Nov 24  2013 lvm2-lvmetad
-r-xr-xr-x. 1 root root  2665 Nov 24  2013 lvm2-monitor
-rwxr-xr-x. 1 root root  2571 Apr  7  2014 mdmonitor
-rwxr-xr-x. 1 root root  2200 Sep 14  2012 messagebus
-rwxr-xr-x. 1 root root  2989 Oct 10  2013 netconsole
-rwxr-xr-x. 1 root root  5428 Oct 10  2013 netfs
-rwxr-xr-x. 1 root root  6334 Oct 10  2013 network
-rwxr-xr-x  1 root root  2515 Jan 28  2015 nscd
-rwxr-xr-x  1 root root  1923 Dec 20  2014 ntpd
-rwxr-xr-x  1 root root  2043 Dec 20  2014 ntpdate
-rwxrwxrwx  1 root root  1459 Mar 10 20:35 openvpnsrv
-rwxr-xr-x. 1 root root  3912 Feb 20  2014 postfix
-rwxr-xr-x. 1 root root  1556 Jul 17  2012 psacct
-rwxr-xr-x. 1 root root  2034 Mar  5  2014 quota_nld
-rwxr-xr-x. 1 root root  1513 Sep 17  2013 rdisc
-rwxr-xr-x. 1 root root  1822 Nov 23  2013 restorecond
-rwxr-xr-x. 1 root root  1808 Dec 18  2011 rngd
-rwxr-xr-x. 1 root root  2011 Aug 15  2013 rsyslog
-rwxr-xr-x. 1 root root  1698 Nov 23  2013 sandbox
-rwxr-xr-x. 1 root root  2056 Nov 20  2012 saslauthd
-rwxr-xr-x. 1 root root   647 Oct 10  2013 single
-rwxr-xr-x. 1 root root  3002 Feb 22  2013 smartd
-rwxr-xr-x. 1 root root  4534 Nov 23  2013 sshd
-rwxr-xr-x. 1 root root  2276 Feb 12  2014 svnserve
-rwxr-xr-x  1 root root  1144 Oct 16  2014 sysstat
-rwxr-xr-x. 1 root root  2294 Nov 23  2013 udev-post
[root@jstukte7a334ry init.d]# ll mysql*
ls: cannot access mysql*: No such file or directory

通过以上检查，服务列表没有mysql，相关的目录下也没有mysql可执行程序，确保系统没有安装 mysql，那么，安装之。

下载MySQL MySQL Community Server

centos 要选 Red Hat Enterprise Linux / Oracle Linux，然后，要选 el6 的版本。linux 版本号中 EL 代表 enterprise linux

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What does el5, el6, and el7 mean?
EL is short for Red Hat Enterprise Linux (EL).
EL5 is the download for Red Hat 5.x, CentOS 5.x, CloudLinux 5.x.
EL6 is the download for Red Hat 6.x, CentOS 6.x, and CloudLinux 6.x.
EL7 is the download for Red Hat 7.x, CentOS 7.x, and CloudLinux 7.x.

The UNIXy Varnish Plugins run on all the above platforms.

我下载的最新版本是：mysql-5.7.18-1.el6.x86_64.rpm-bundle.tar
下载后，解压：

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tar -xvf mysql-5.7.18-1.el6.x86_64.rpm-bundle.tar

得到以下文件列表：

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# ll
total 918984
-rw-r--r-- 1 root root  470507520 Mar 20 18:52 mysql-5.7.18-1.el6.x86_64.rpm-bundle.tar
-rw-r--r-- 1 7155 31415  23618836 Mar 20 17:40 mysql-community-client-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415    335496 Mar 20 17:40 mysql-community-common-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415   3747352 Mar 20 17:40 mysql-community-devel-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415  39086508 Mar 20 17:40 mysql-community-embedded-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415 135869292 Mar 20 17:40 mysql-community-embedded-devel-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415   2177064 Mar 20 17:40 mysql-community-libs-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415   1723180 Mar 20 17:40 mysql-community-libs-compat-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415 159060212 Mar 20 17:41 mysql-community-server-5.7.18-1.el6.x86_64.rpm
-rw-r--r-- 1 7155 31415 104881084 Mar 20 17:41 mysql-community-test-5.7.18-1.el6.x86_64.rpm

安装client 需要先安装 libs

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# rpm -ivh mysql-community-client-5.7.18-1.el6.x86_64.rpm
warning: mysql-community-client-5.7.18-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
error: Failed dependencies:
        mysql-community-libs(x86-64) >= 5.7.9 is needed by mysql-community-client-5.7.18-1.el6.x86_64

而安装 libs 需要先安装 common

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# rpm -ivh mysql-community-libs-5.7.18-1.el6.x86_64.rpm 
warning: mysql-community-libs-5.7.18-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
error: Failed dependencies:
        mysql-community-common(x86-64) >= 5.7.9 is needed by mysql-community-libs-5.7.18-1.el6.x86_64

所以，最先被安装的，应该是 common

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# rpm -ivh mysql-community-common-5.7.18-1.el6.x86_64.rpm
warning: mysql-community-common-5.7.18-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
        file /usr/share/mysql/czech/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/danish/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/dutch/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/english/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/estonian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/french/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/german/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/greek/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/hungarian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/italian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/japanese/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/korean/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/norwegian-ny/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/norwegian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/polish/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/portuguese/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/romanian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/russian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/serbian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/slovak/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/spanish/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/swedish/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/ukrainian/errmsg.sys from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/Index.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/armscii8.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/ascii.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/cp1250.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/cp1256.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/cp1257.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/cp850.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/cp852.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/cp866.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/dec8.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/geostd8.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/greek.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/hebrew.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/hp8.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/keybcs2.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/koi8r.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/koi8u.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/latin1.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/latin2.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/latin5.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/latin7.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/macce.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/macroman.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64
        file /usr/share/mysql/charsets/swe7.xml from install of mysql-community-common-5.7.18-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-3.el6_5.x86_64

安装过程中，提示与 centos6.5 自带的旧版本冲突。 解决：

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# yum -y remove mysql-libs-5.1.73*
Loaded plugins: security
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package mysql-libs.x86_64 0:5.1.73-3.el6_5 will be erased
--> Processing Dependency: libmysqlclient.so.16()(64bit) for package: 2:postfix-2.6.6-6.el6_5.x86_64
--> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16)(64bit) for package: 2:postfix-2.6.6-6.el6_5.x86_64
--> Processing Dependency: mysql-libs for package: 2:postfix-2.6.6-6.el6_5.x86_64
--> Running transaction check
---> Package postfix.x86_64 2:2.6.6-6.el6_5 will be erased
--> Processing Dependency: /usr/sbin/sendmail for package: redhat-lsb-core-4.0-7.el6.centos.x86_64
--> Processing Dependency: /usr/sbin/sendmail for package: cronie-1.4.4-12.el6.x86_64
--> Running transaction check
---> Package cronie.x86_64 0:1.4.4-12.el6 will be erased
--> Processing Dependency: cronie = 1.4.4-12.el6 for package: cronie-anacron-1.4.4-12.el6.x86_64
---> Package redhat-lsb-core.x86_64 0:4.0-7.el6.centos will be erased
--> Running transaction check
---> Package cronie-anacron.x86_64 0:1.4.4-12.el6 will be erased
--> Processing Dependency: /etc/cron.d for package: crontabs-1.10-33.el6.noarch
--> Processing Dependency: /etc/cron.d for package: sysstat-9.0.4-27.el6.x86_64
--> Restarting Dependency Resolution with new changes.
--> Running transaction check
---> Package crontabs.noarch 0:1.10-33.el6 will be erased
---> Package sysstat.x86_64 0:9.0.4-27.el6 will be erased
--> Finished Dependency Resolution
base                                                                                                        | 3.7 kB     00:00     
epel                                                                                                        | 4.3 kB     00:00     
epel/primary_db                                                                                             | 5.9 MB     00:05     
extras                                                                                                      | 3.4 kB     00:00     
updates                                                                                                     | 3.4 kB     00:00     

Dependencies Resolved

===================================================================================================================================
 Package                   Arch             Version                       Repository                                          Size
===================================================================================================================================
Removing:
 mysql-libs                x86_64           5.1.73-3.el6_5                @updates                                           4.0 M
Removing for dependencies:
 cronie                    x86_64           1.4.4-12.el6                  @anaconda-CentOS-201311291202.x86_64/6.5           174 k
 cronie-anacron            x86_64           1.4.4-12.el6                  @anaconda-CentOS-201311291202.x86_64/6.5            43 k
 crontabs                  noarch           1.10-33.el6                   @anaconda-CentOS-201311291202.x86_64/6.5           2.4 k
 postfix                   x86_64           2:2.6.6-6.el6_5               @updates                                           9.7 M
 redhat-lsb-core           x86_64           4.0-7.el6.centos              @anaconda-CentOS-201311291202.x86_64/6.5            22 k
 sysstat                   x86_64           9.0.4-27.el6                  @base                                              825 k

Transaction Summary
===================================================================================================================================
Remove        7 Package(s)

Installed size: 15 M
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Erasing    : redhat-lsb-core-4.0-7.el6.centos.x86_64                                                                         1/7 
  Erasing    : sysstat-9.0.4-27.el6.x86_64                                                                                     2/7 
/var/tmp/rpm-tmp.WcRV33: line 1: lsb_release: command not found
  Erasing    : cronie-1.4.4-12.el6.x86_64                                                                                      3/7 
  Erasing    : cronie-anacron-1.4.4-12.el6.x86_64                                                                              4/7 
  Erasing    : crontabs-1.10-33.el6.noarch                                                                                     5/7 
  Erasing    : 2:postfix-2.6.6-6.el6_5.x86_64                                                                                  6/7 
  Erasing    : mysql-libs-5.1.73-3.el6_5.x86_64                                                                                7/7 
  Verifying  : cronie-anacron-1.4.4-12.el6.x86_64                                                                              1/7 
  Verifying  : mysql-libs-5.1.73-3.el6_5.x86_64                                                                                2/7 
  Verifying  : redhat-lsb-core-4.0-7.el6.centos.x86_64                                                                         3/7 
  Verifying  : sysstat-9.0.4-27.el6.x86_64                                                                                     4/7 
  Verifying  : crontabs-1.10-33.el6.noarch                                                                                     5/7 
  Verifying  : cronie-1.4.4-12.el6.x86_64                                                                                      6/7 
  Verifying  : 2:postfix-2.6.6-6.el6_5.x86_64                                                                                  7/7 

Removed:
  mysql-libs.x86_64 0:5.1.73-3.el6_5                                                                                               

Dependency Removed:
  cronie.x86_64 0:1.4.4-12.el6            cronie-anacron.x86_64 0:1.4.4-12.el6               crontabs.noarch 0:1.10-33.el6         
  postfix.x86_64 2:2.6.6-6.el6_5          redhat-lsb-core.x86_64 0:4.0-7.el6.centos          sysstat.x86_64 0:9.0.4-27.el6         

Complete!

再次安装

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# rpm -ivh mysql-community-common-5.7.18-1.el6.x86_64.rpm
warning: mysql-community-common-5.7.18-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-common ########################################### [100%]

然后是 libs

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# rpm -ivh mysql-community-libs-5.7.18-1.el6.x86_64.rpm 
warning: mysql-community-libs-5.7.18-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-libs   ########################################### [100%]

最后是 client

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# rpm -ivh mysql-community-client-5.7.18-1.el6.x86_64.rpm 
warning: mysql-community-client-5.7.18-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-client ########################################### [100%]

再次查找 mysql

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# find / -name mysql
/usr/lib64/mysql
/usr/share/mysql
/usr/bin/mysql

多了一个目录：/usr/bin/mysql

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# cd /usr/bin/mysql
-bash: cd: /usr/bin/mysql: Not a directory

哈哈，这不是一个目录，这就是刚刚安装好的 mysql client
检查是否安装成功

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# mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

看到上面的提示，说明 mysql 客户端已经安装成功了的。