为什么无法启动mysql?????

tomeee

mysqladmin -u root create mydb
mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/tmp/mysql.sock' exists!
mysqld是已经启动的，但时/tmp里没有mysql.sock这个文件，我自己新建了一个，还是启动不了。