分享在CentOS 6.9环境中安装MySQL 5.1.73 数据库，希望对大家有所帮助。
1、确认mysql是否已安装，有下面的代码可知
[root@cdh1 linuxidc]# yum list installed mysql*
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
* base: mirrors.zju.edu.cn
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Installed Packages
MySQL-Python.x86_64 1.2.3-0.3.c1.1.el6 @base
mysql-libs.x86_64 5.1.73-8.el6_8 @anaconda-CentOS-201703281317.x86_64/6.9
2、卸载已安装的mysql，建议使用yum命令，因为yum命令可以自动删除与mysql相关的依赖；如果使用rpm命令，则还需要手动去删除和mysql相关的文件，比较麻烦
[root@cdh1 linuxidc]# yum remove MySQL-python.x86_64 mysql-libs.x86_64
Loaded plugins: fastestmirror, refresh-packagekit, security
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package MySQL-python.x86_64 0:1.2.3-0.3.c1.1.el6 will be erased
--> Processing Dependency: MySQL-python for package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el6.x86_64
---> Package mysql-libs.x86_64 0:5.1.73-8.el6_8 will be erased
--> Processing Dependency: libmysqlclient.so.16()(64bit) for package: 2:postfix-2.6.6-8.el6.x86_64
--> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16)(64bit) for package: 2:postfix-2.6.6-8.el6.x86_64
--> Processing Dependency: mysql-libs for package: 2:postfix-2.6.6-8.el6.x86_64
--> Running transaction check
---> Package cloudera-manager-agent.x86_64 0:5.11.1-1.cm5111.p0.9.el6 will be erased
---> Package postfix.x86_64 2:2.6.6-8.el6 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-1.4.4-16.el6_8.2.x86_64
--> Running transaction check
---> Package cronie.x86_64 0:1.4.4-16.el6_8.2 will be erased
--> Processing Dependency: cronie = 1.4.4-16.el6_8.2 for package: cronie-anacron-1.4.4-16.el6_8.2.x86_64
---> Package redhat-lsb-core.x86_64 0:4.0-7.el6.centos will be erased
--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0 for package: redhat-lsb-printing-4.0-7.el6.centos.x86_64
--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0-7.el6.centos for package: redhat-lsb-4.0-7.el6.centos.x86_64
--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0 for package: redhat-lsb-graphics-4.0-7.el6.centos.x86_64
--> Running transaction check
---> Package cronie-anacron.x86_64 0:1.4.4-16.el6_8.2 will be erased
---> Package redhat-lsb.x86_64 0:4.0-7.el6.centos will be erased
--> Processing Dependency: redhat-lsb(x86-64) = 4.0-7.el6.centos for package: redhat-lsb-compat-4.0-7.el6.centos.x86_64
---> Package redhat-lsb-graphics.x86_64 0:4.0-7.el6.centos will be erased
---> Package redhat-lsb-printing.x86_64 0:4.0-7.el6.centos will be erased
--> Running transaction check
---> Package redhat-lsb-compat.x86_64 0:4.0-7.el6.centos will be erased
--> Processing Dependency: /etc/cron.d for package: crontabs-1.10-33.el6.noarch
--> Processing Dependency: /etc/cron.d for package: sysstat-9.0.4-33.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 0:9.0.4-33.el6 will be erased
--> Finished Dependency Resolution
Dependencies Resolved
====================================================================
Package Arch Version Repository
Size
====================================================================
Removing:
MySQL-python x86_64 1.2.3-0.3.c1.1.el6 @base 246 k
mysql-libs x86_64 5.1.73-8.el6_8 @anaconda-CentOS-201703281317.x86_64/6.9
4.0 M
Removingfor dependencies:
cloudera-manager-agent x86_64 5.11.1-1.cm5111.p0.9.el6 @/cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el6.x86_64
71 M
cronie x86_641.4.4-16.el6_8.2 @anaconda-CentOS-201703281317.x86_64/6.9
174 k
cronie-anacron x86_64 1.4.4-16.el6_8.2 @anaconda-CentOS-201703281317.x86_64/6.9
43 k
crontabs noarch1.10-33.el6 @anaconda-CentOS-201703281317.x86_64/6.9
2.4 k
postfix x86_642:2.6.6-8.el6 @anaconda-CentOS-201703281317.x86_64/6.9
9.7 M
redhat-lsb x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9
0.0
redhat-lsb-compat x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9
0.0
redhat-lsb-core x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9
22 k
redhat-lsb-graphics x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9
0.0
redhat-lsb-printing x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9
0.0
sysstat x86_649.0.4-33.el6 @anaconda-CentOS-201703281317.x86_64/6.9
826 k
Transaction Summary
====================================================================
Remove 13 Package(s)
Installed size:86 M
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside ofyum.
Erasing : redhat-lsb-compat-4.0-7.el6.centos.x86_64 1/13
Erasing : redhat-lsb-4.0-7.el6.centos.x86_64 2/13
Erasing : cloudera-manager-agent-5.11.1-1.cm5111.p0.9. 3/13
warning:/etc/cloudera-scm-agent/config.ini saved as /etc/cloudera-scm-agent/config.ini.rpmsave
Erasing : redhat-lsb-graphics-4.0-7.el6.centos.x86_64 4/13
Erasing : redhat-lsb-printing-4.0-7.el6.centos.x86_64 5/13
Erasing : redhat-lsb-core-4.0-7.el6.centos.x86_64 6/13
/var/tmp/rpm-tmp.jLbJUk: line 1: lsb_release: command not found
Erasing : MySQL-python-1.2.3-0.3.c1.1.el6.x86_64 7/13
Erasing : sysstat-9.0.4-33.el6.x86_64 8/13
Erasing : crontabs-1.10-33.el6.noarch 9/13
Erasing : cronie-anacron-1.4.4-16.el6_8.2.x86_64 10/13
Erasing : cronie-1.4.4-16.el6_8.2.x86_64 11/13
Erasing :2:postfix-2.6.6-8.el6.x86_64 12/13
Erasing : mysql-libs-5.1.73-8.el6_8.x86_64 13/13
Verifying : redhat-lsb-printing-4.0-7.el6.centos.x86_64 1/13
Verifying : cronie-anacron-1.4.4-16.el6_8.2.x86_64 2/13
Verifying : cronie-1.4.4-16.el6_8.2.x86_64 3/13
Verifying :2:postfix-2.6.6-8.el6.x86_64 4/13
Verifying : redhat-lsb-4.0-7.el6.centos.x86_64 5/13
Verifying : redhat-lsb-core-4.0-7.el6.centos.x86_64 6/13
Verifying : cloudera-manager-agent-5.11.1-1.cm5111.p0.9. 7/13
Verifying : crontabs-1.10-33.el6.noarch 8/13
Verifying : redhat-lsb-compat-4.0-7.el6.centos.x86_64 9/13
Verifying : MySQL-python-1.2.3-0.3.c1.1.el6.x86_64 10/13
Verifying : redhat-lsb-graphics-4.0-7.el6.centos.x86_64 11/13
Verifying : sysstat-9.0.4-33.el6.x86_64 12/13
Verifying : mysql-libs-5.1.73-8.el6_8.x86_64 13/13
Removed:
MySQL-python.x86_64 0:1.2.3-0.3.c1.1.el6
mysql-libs.x86_64 0:5.1.73-8.el6_8
Dependency Removed:
cloudera-manager-agent.x86_64 0:5.11.1-1.cm5111.p0.9.el6
cronie.x86_640:1.4.4-16.el6_8.2
cronie-anacron.x86_64 0:1.4.4-16.el6_8.2
crontabs.noarch0:1.10-33.el6
postfix.x86_642:2.6.6-8.el6
redhat-lsb.x86_64 0:4.0-7.el6.centos
redhat-lsb-compat.x86_64 0:4.0-7.el6.centos
redhat-lsb-core.x86_64 0:4.0-7.el6.centos
redhat-lsb-graphics.x86_64 0:4.0-7.el6.centos
redhat-lsb-printing.x86_64 0:4.0-7.el6.centos
sysstat.x86_640:9.0.4-33.el6
Complete!
3、用whereis命令查找mysql相关的文件，因为步骤2用yum来卸载，所以mysql被清理得很干净；如果使用rpm将会很麻烦，有很多的文件需要手动清除
[root@cdh1 linuxidc]# whereis mysql mysql:
4、查看系统中的mysql安装包