[root@cch rpm]# rpm -qa | grep -i mysql
mysql-libs-5.1.69-1.el6_4.x86_64
[root@cch rpm]# rpm -e mysql-libs-5.1.69-1.el6_4.x86_64
error: Failed dependencies:
libmysqlclient.so.16()(64bit) is needed by (installed) postfix-2:2.6.6-2.2.el6_1.x86_64
libmysqlclient.so.16(libmysqlclient_16)(64bit) is needed by (installed) postfix-2:2.6.6-2.2.el6_1.x86_64
mysql-libs is needed by (installed) postfix-2:2.6.6-2.2.el6_1.x86_64
解决办法：

rpm -e --nodeps mysql-libs-5.1.69-1.el6_4.x86_64

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