glibc
1、安装依赖库
yum list installed |grep libaio
2、解压查看
# ls
mysql-8.0.33-linux-glibc2.12-x86_64.tar
# tar -xvf mysql-8.0.33-linuxglibc2.12-x86_64.ta
# tar -xvf mysql-8.0.33-linuxglibc2.12-x86_64.tar.xz
# ls mysql-8.0.33-linuxglibc2.12-x86_64
3、创建⽤户
# useradd -r -s /sbin/nologin
mysql
# id mysql
4、清空其他环境 mariadb
# rm -rf /etc/my.cnf
5、切换mysql8⽬录，创建⼀个mysqfiles
cd /mysql8/
mkdir mysql-files
6、修改mysql-files⽂件权限750和所属 mysql
# chown mysql:mysql mysqlfiles/
# chmod 750 mysql-files/
# ls -l
7、初始化数据库，找到初始密码
# ./bin/mysqld --initialize --user=mysql --basedir=/mysql8
启动服务 不能使⽤systemctl
# service mysql8 start
远程连接命令
mysql -h主机IP或者域名 -P端口号 -u账号 -p密码
[root@n ~]# /usr/local/mysql/bin/mysql -uroot -pYn@666666
1、远程登录前提条件是mysql.user表中的host属性为%，如果是localhost就不允许远程登陆，
update mysql.user set host="%" where user="root",flush privileges;
2、远程管理，可以使用图形化工具，sqlyog,navicat,掌握命令工具，客户端工具 mysql
3、mysql -hIP地址 -P3306 -u用户 -p密码
(我的是 mysql -h192.168.1.20 -P3306 -uhaitai -phai_tai6)
-h 主机IP或者是域名 如果是localhost或者是127.0.0.1可以省略
-P 端口 默认是3306 ，如果是默认的，可以省略
-u 用户名
-p 密码，可以不换行直接输入，也可以换行，不回显输入密码
#创建账户
create user 'haitai'@'%' identified by 'hai_tai6';
#给权限grant all on *.* to 'haitai';
#创建库create database if not exists test;
#创建表
use test;
create table user(
id int primary key,
username varchar(45) not null,
password varchar(45) not null,
);
#添加数据(主键约束，编号保持唯一)insert into test.user values(1,"zhangsan"."123");
insert into test.user values(2,"lisi"."456");
insert into test.user values(3,"wangwu"."789");
insert into test.user values(4,"zhaoliu"."aaa");
脚本
[root@n ~]# vim mysql.sh
[root@n ~]# cat mysql.sh
#!/bin/bash
cp $1 /usr/local/mysql
mkdir /usr/local/mysql/mysql-files/
grep /mysql/ /etc/password
if [ $? ne 0 ];then
useradd -r -s /sbin/nologin mysql
fi
chown mysql:mysql /usr/local/mysql/mysql-files
chmod 750 /usr/local/mysql/mysql-files
#init
/usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/
#password
#service
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql8
#start server
service mysql8 start
查看表
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| test |
+--------------------+
5 rows in set (0.00 sec)
查看这个表里得所有列
mysql> select * from test.user;
+----+----------+----------+
| id | username | password |
+----+----------+----------+
| 1 | zhangsan | 123 |
| 2 | lisi | 456 |
| 3 | wangwu | 789 |
| 4 | zhaoliu | aaa |
| 5 | fubao | fubao |
+----+----------+----------+
5 rows in set (0.00 sec)
添加账号，修改密码，查看mysql.user中的账号信息
mysql> create user 'lilaosi'@'%' identified by 'lilaosi_6';
Query OK, 0 rows affected (0.00 sec)
mysql> select host,user from mysql.user;
+-----------+------------------+
| host | user |
+-----------+------------------+
| % | haitai |
| % | lilaosi |
| localhost | mysql.infoschema |
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+------------------+
6 rows in set (0.00 sec)
使用haitai账号，为lilaosi账号添加test库中所有的权限
[root@n ~]# /usr/local/mysql/bin/mysql -uroot -pYn@666666
mysql> grant all on test.* to 'lilaosi'; #lilaosi获得了test库中所有的表
的权限，但是由于root没有给lilaosi库的权限，所以lilaosi无法查看mysql库
Query OK, 0 rows affected (0.01 sec)
[root@n ~]# /usr/local/mysql/bin/mysql -h192.168.1.20 -P3306 -ulilaosi -plilaosi_6
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| performance_schema |
| test |
+--------------------+
3 rows in set (0.00 sec)
练习创建账户
mysql> create user 'aaa'@'%' identified by 'aaaa';
Query OK, 0 rows affected (0.00 sec)
mysql> create user 'abc'@'%' identified by 'abcd';
Query OK, 0 rows affected (0.01 sec)
mysql> create user 'ccc'@'%' identified by 'a1b2c3';
Query OK, 0 rows affected (0.01 sec)
mysql> create user 'ddd'@'%' identified by '231343';
Query OK, 0 rows affected (0.00 sec)
mysql> select host,user from mysql.user;
+-----------+------------------+
| host | user |
+-----------+------------------+
| % | aaa |
| % | abc |
| % | ccc |
| % | ddd |
| % | haitai |
| % | lilaosi |
| localhost | mysql.infoschema |
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+------------------+
10 rows in set (0.00 sec)
删除用户
mysql> drop user 'lilaosi';
Query OK, 0 rows affected (0.00 sec)
练习
1.添加boss⻆⾊
create role 'boss';
2.添加yuangong⻆⾊
craete role 'yaungong';
3.为boss添加select insert delete update权限
grant select ,insert,delete,update on test.user to
'boss';
4.为yuangong添加select，insert权限
grant select,insert on test.user to 'yuangong';
5.查看⻆⾊保存的表格
selet host,user from mysql.user;
6.查看⻆⾊的权限
show grants for 'boss';
show grants for 'yaungogng';
新增bbb和ggg两个⽤户bbb是经理需要增删改查权限，ggg是员⼯是
只需要新增和查看的权限
grant boss to 'bbb';
grant yuangong to 'ccc';
mysql> show grants for 'bbb';
+---------------------------------+
| Grants for bbb@% |
+---------------------------------+
| GRANT USAGE ON *.* TO `bbb`@`%` |
| GRANT `boss`@`%` TO `bbb`@`%` |
+---------------------------------+
2 rows in set (0.00 sec)
mysql> show grants for 'ggg';
+-----------------------------------+
| Grants for ggg@% |
+-----------------------------------+
| GRANT USAGE ON *.* TO `ggg`@`%` |
| GRANT `yuangong`@`%` TO `ggg`@`%` |
+-----------------------------------+
2 rows in set (0.00 sec)
练习
步骤
1.添加aaa账户，设置密码aaaa
drop user aaa;
create user 'aaa'@'%' identified by 'aaaa';
2.使用aaa账户访问mysql服务
mysql -h127.0.0.1 -P3306 -uaaa -paaaa
3.查看test数据库发现没有权限
show databases;
4.退出并使用root账户登录
quit|exit
mysql -h127.0.0.1 -P3306 -uroot -proot0000
5.为aaa账户添加查看test.user表的权限
grant select on test.user to 'aaa';
6.退出root，使用aaa账户登录
quit|exit
mysql -h127.0.0.1 -P3306 -uaaa -paaaa
7.查看数据库，查看表，查看表内容 能够正常查看
show databases;
user test;
show tables;
select * from user;
8.输入数据，没有权限
insert into user values(5,"ermazi","ermazi");####
9.退出aaa使用root登录
quit|exit
mysql -h127.0.0.1 -P3306 -uroot -proot0000
10.为aaa添加insert权限
grant insert on test.user to 'aaa';
11.退出root使用aaa登录
exit|quit
mysql -h127.0.0.1 -P3306 -uaaa -paaaa
12.向user表添加一行新的数据
insert into test.user values(6,"zhangsanfeng","zhangsanfen");
13.修改user中一行的数据的password（密码）为111，没有update权限
update test.user set password='zsf' where username-'zhangsanfeng';