MySQL error! The server quit without updating PID file (/usr/local/mysql/data/laolinghundembp.pid

This problem occurs after installation if you have not set it. When you turn on your computer, MySQL will start it on its own. (Click on the MySQL logo at the bottom of System preferences to view it). It should be the latest version of MySQL that does not support previous login commands.

Just installed MySQL if input MySQL order will prompt no commod not found

At this point we need to add MySQL to the system environment variable

1. 执行vim ~/.bash_profile 加入 先输入i 进行编辑

PATH=$PATH:/usr/local/mysql/bin 
   esc推出   在输入 ：wq！ 保存退出 。
2.然后 输入 mysql -u root -p 会车  输入你的密码  默认密码root  即可登陆mysql 

MySQL error! The server quit without updating PID file (/usr/local/mysql/data/laolinghundembp.pid