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自定义Mysql启动命令

/usr/local/mysql/bin/mysqld –defaults-extra-file=/usr/local/mysql/my.cnf –basedir=/usr/local/mysql –datadir=/usr/local/mysql/data –user=mysql –log-error=/usr/local/mysql/data/localhost.localdomain.err –pid-file=/usr/local/mysql/data/localhost.localdomain.pid –socket=/tmp/mysql.sock –port=3306

通过定义里面的参数，可以在一个机子上启动多个Mysql实例在不同的端口

CREATE USER ‘username’@'%’ IDENTIFIED BY ‘password’;
创建用户，%代表可以来自任何主机，如果是本机，可以写localhost

GRANT ALL PRIVILEGES ON * . * TO ‘username’@'%’ IDENTIFIED BY ‘password’ WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0
给用户赋所有权限，也可以根据需要，赋特定的权限

导出一个库
mysql/bin/mysqldump -u user -p password dbname > /full/path/dbname.sql

导入一个库
mysql -u user -p password –default-character-set=utf8 dbname < /full/path/dbname.sql
–default-character-set是指定数据库编码