重新安装mysql报错

想装一个更高版本的mysql，于是停止mysqld服务并rm -rf /usr/local/mysql
安装mysql-5.6.29-linux-glibc2.5-i686.tar.gz，执行./scripts/mysql_install_db --user=mysql --datadir=/data/mysql
出现下面错误提示：

[ERROR] ./bin/mysqld: unknown option '--skip-locking'
[ERROR] Aborting

[Note] Binlog end
[Note] InnoDB: FTS optimize thread exiting.
[Note] InnoDB: Starting shutdown...
[Note] InnoDB: Shutdown completed; log sequence number 1600607
[Note] ./bin/mysqld: Shutdown complete

## 查找mysql发现之前安装mysql包
[root@localhost mysql]# rpm -qa |grep mysql
mysql-libs-5.1.73-5.el6_6.i686

##卸载提示有依赖包
[root@localhost mysql]# rpm -e mysql-libs-5.1.73-5.el6_6.i686
error: Failed dependencies:
    libmysqlclient.so.16 is needed by (installed) postfix-2:2.6.6-6.el6_7.1.i686
    libmysqlclient.so.16 is needed by (installed) perl-DBD-MySQL-4.013-3.el6.i686
    libmysqlclient.so.16(libmysqlclient_16) is needed by (installed) postfix-2:2.6.6-6.el6_7.1.i686
    libmysqlclient.so.16(libmysqlclient_16) is needed by (installed) perl-DBD-MySQL-4.013-3.el6.i686
    mysql-libs is needed by (installed) postfix-2:2.6.6-6.el6_7.1.i686

## 加上参数 --nodeps，卸载完成
[root@localhost mysql]# rpm -e mysql-libs-5.1.73-5.el6_6.i686 --nodeps
warning: /etc/my.cnf saved as /etc/my.cnf.rpmsave

## 再执行安装，安装成功
./scripts/mysql_install_db --user=mysql --datadir=/data/mysql