ubuntu mysql install 安装以及相关简单操作

$ mysql -uroot -hlocalhost -proot
mysql> insert into mysql.user(Host,User,Password) values("localhost","ice",password("icepasswd"));
mysql> flush privileges;    # 刷新系统权限表

mysql> grant select on db_name.* to ice@localhost identified by "icepasswd"
mysql> flush privileges;

mysql> update mysql.user set password=password("新密码") where User="ice" and Host="localhost";
mysql> flush privileges;

$ mysql -uroot -hlocalhost -proot
mysql> use mysql
mysql> delete from user where User="ice" and Host="localhost"
mysql> flush privileges;