在一测试服务器（CentOS Linux release 7.2.1511）上安装MySQL 5.6（5.6.19 MySQL Community Server）时遇到下面错误，这个是因为CentOS 7的默认数据库已经不再是MySQL了，而是MariaDB. MySQL安装时的mysql lib库与mariadb的库、包冲突了，如下详情所示（省略了大量日志）
[root@azrlnx06 tmp]# rpm -ivh MySQL-server-advanced-5.6.20-1.rhel5.x86_64.rpm Preparing... ################################# [100%] file /usr/share/mysql/czech/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/danish/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/dutch/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/english/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/estonian/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/french/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/german/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/greek/errmsg.sys from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 ........................................................................................................................................................................ file /usr/share/mysql/charsets/macroman.xml from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64 file /usr/share/mysql/charsets/swe7.xml from install of MySQL-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
检查是否存在mariadb的相关组件,然后删除mariadb相关组件。如下所示：
[root@azrlnx06 mysql]# more /etc/RedHat-release CentOS Linux release 7.2.1511 (Core) [root@azrlnx06 mysql]# rpm -qa |grep mariadb mariadb-libs-5.5.50-1.el7_2.x86_64 [root@azrlnx06 mysql]# rpm -e mariadb-libs-5.5.50-1.el7_2.x86_64 error: Failed dependencies: libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64 libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64 [root@azrlnx06 mysql]# rpm -e mariadb-libs-5.5.50-1.el7_2.x86_64 --nodeps
当然此处删除mariadb-libs-5.5.50-1.el7_2.x86_64组件时遇到依赖错误，遂强制删除该组件，最好使用yum删除mariadb相关组件。然后重新安装MySQL时遇到"error: MySQL-server-advanced-5.6.20-1.rhel5.x86_64: install failed"错误，如下所示：
[root@azrlnx06 mysql]# cd /tmp [root@azrlnx06 tmp]# ls hsperfdata_azrlnx06 jirasetup MySQL-server-advanced-5.6.20-1.rhel5.x86_64.rpm [root@azrlnx06 tmp]# rpm -ivh MySQL-server-advanced-5.6.20-1.rhel5.x86_64.rpm Preparing... ################################# [100%] Updating / installing... 1:MySQL-server-advanced-5.6.20-1.rh################################# [100%] error: unpacking of archive failed on file /usr/bin/innochecksum;582535c8: cpio: read failed - No such file or directory error: MySQL-server-advanced-5.6.20-1.rhel5.x86_64: install failed [root@azrlnx06 tmp]#
对这个错误有点莫名其妙，卸载MySQL相关组件后，重新安装MySQL，发现缺少Perl相关模组。如下所示：