这是为什么呢

# rpm -ivh mysql-connector-odbc-3.51.17-1.i386.rpm

warning: mysql-connector-odbc-3.51.17-1.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
error: Failed dependencies:
        libltdl.so.3 is needed by mysql-connector-odbc-3.51.17-1.i386
        libodbc.so.1 is needed by mysql-connector-odbc-3.51.17-1.i386
        libodbcinst.so.1 is needed by mysql-connector-odbc-3.51.17-1.i386
        libz.so.1 is needed by mysql-connector-odbc-3.51.17-1.i386

求解，谢谢！

你安装的这个包依赖下面这些库，你对应的安装即可。
用YUM会自动帮你解决依赖关系。

同上