mysql启动报错 The server quit without updating PID file

[root@uz6542 data]# /etc/init.d/mysqld start
Starting MySQL... ERROR! The server quit without updating PID file (/usr/local/mysql/data/uz6542.pid).

查看mysql日志信息：

mysql_install_db FATAL ERROR: Could not find ./bin/my_print_defaults

解决方法：初始化mysql

/usr/local/mysql/scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data --basedir=/usr/local/mysql

还是报错，经查发现my.cnf配置slow日志查询文件处发生错误，修改后启动正常。