Mysql創建用戶並授權以及開啟遠程訪問
創建用戶並授權
1、登錄mysql
mysql -u root -p
2、創建數據庫
create database test;//以創建test為例
3、創建用戶
創建user01,只能本地訪問
create user user01@'localhost' identified by 'password';
創建user02,可以遠程訪問
create user user02@'%' identified by 'password'
4、修改用戶密碼
以user01為例：
set password for 'user01'@'localhost'=password('anotherpassword')
5、授權
授予user01管理test的全部權限
grant all privileges on test.* to user01;
授予user02查看權限，並修改密碼
grant select on *.* to 'user02'@'%' identified by 'anotherpassword';
授予所有權限
GRANT ALL PRIVILEGES ON *.* TO zhangsan@"%" IDENTIFIED BY "lisi";
8.0版不能直接grant 語法創建用戶了；可以在建用戶的時候設置密碼；或create后再alter修改密碼； 然后授權
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'xxxxxx';
Query OK, 0 rows affected (0.01 sec)
mysql> use mysql
Database changed
mysql> select host, user, authentication_string, plugin from mysql.user;
+-----------+------------------+------------------------------------------------------------------------+------------------
| host | user | authentication_string | plugin
+-----------+------------------+------------------------------------------------------------------------+------------------
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | caching_sha2_pass
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | caching_sha2_pass
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | caching_sha2_pass
| localhost | root | $A$005$X Ze/bh?ty wH2lE/FyW4VTakA7Gslux8reGv2eMPPxtxEhf84XFROc2 | caching_sha2_passwo
+-----------+------------------+------------------------------------------------------------------------+------------------
4 rows in set (0.00 sec)
-------------------------------------------------------------------------------------------
查看user表的root用戶Host字段是localhost，說明root用戶只能本地登錄，現在把他改成遠程登錄
------------------------------------------------------------------------------------------
mysql> update user set host='%' where user='root';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)
=====================================================================================================
MySQL8.0之前的版本密碼加密規則：mysql_native_password，
MySQL8.0密碼加密規則：caching_sha2_password
不一樣
修改mysql加密規則
輸入命令
ALTER USER 'root'@'%' IDENTIFIED BY 'xxxxxx' PASSWORD EXPIRE NEVER;
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'xxxxxx';
FLUSH PRIVILEGES;
*****防火牆放行mysql port*****
firewall-cmd --zone=public --add-port=33062/tcp --permanent （--permanent永久生效，沒有此參數重啟后失效）
firewall-cmd --reload
*****iptables防火牆的自行解決一下*****