# chkconfig --list    列出所有系統(tǒng)服務
# chkconfig --list | grep on   列出所有啟動的系統(tǒng)服務
# chkconfig --list mysqld 
# whereis mysql 查看文件安裝路徑
# which mysql   查詢運行文件所在路徑(文件夾地址)
usr/bin/mysql 是指：mysql的運行路徑
var/lib/mysql 是指：mysql數據庫文件的存放路徑
usr/lib/mysql 是指：mysql的安裝路徑

# vi /etc/profile
# export MYSQL_HOME=/usr/local/mysql
# export PATH=$PATH:$MYSQL_HOME/bin

# service mysqld start  啟動MySQL
# service mysqld restart 重啟MySQL
# service mysqld stop   停止MySQL

# -u root -p /mysql -h localhost -u root -p DatabaseName;  進入MySQL
 MySQL> show databases;      列出數據庫
 MySQL> create database XXX;   創(chuàng)建數據庫XXX
 MySQL> use databaseName;     使用數據庫databaseName
 MySQL> show tables;       列出表單
MySQL> create table mytablename (ID int auto_increment not null primary key,usename varchar(20),password varchar(64),sex varchar(10),address varchar(20)); 創(chuàng)建表單
MySQL> drop table mytablename ;         刪除表單
MySQL> drop database databasename;       刪除數據庫

MySQL> insert into mytablename values('','zhangsan','123456','fomale','guiyanag'); 插入
MySQL> select * from mytablename ;         查找驗證結果
MySQL> select * from mytablename where ID = '1'; 精準查找
MySQL> update mytablename set address = 'shanghai' where username = 'zhangsan'; 修改zhangsan的address為shanghai
MySQL> delete from mytablename where ID = '1';   刪除記錄

grant select On database.* to username@localhost identity by 'password'

MySQL> grant select,insert update,delete on *.* to user_1@"%" identity by "123456";

MySQL> grant select,insert update,delete on *.* to user_2@localhost identity by "123456";

MySQL> -u user_1 -p -h IP地址;