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MySQL新建用户中%包不包括localhost吗

latboss • • 数据库 • 阅读 129

这篇文章主要介绍了MySQL新建用户中%包不包括localhost吗，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。正常解释%代表任何客户机都可以连接
localhost代表只可以本机连接一般情况能访问本地数据库的都是加了权限了，一般都是禁止别的机器访问本地的mysql端口的，如果允许也是要加上指定ip才可以访问，这样才能保证数据库不会被远程访问。操作MySQL的时候发现，有时只建了%的账号，可以通过localhost连接，有时候却不可以，网上搜索也找不到满意的答案，干脆手动测试一波这里说的两种连接方法指是执行mysql命令时，-h参数填的是localhost还是IP, 两种连接方式的区别如下-h 参数为 localhost
当-h参数为localhost的时候，实际上是使用socket连接的（默认连接方式）, 实例如下[mysql@mysql-test-83 ~]$ /usr/local/mysql57/bin/mysql -utest_user -p -hlocalhost
Enter password:
========= 省略 ===========mysql> status
/usr/local/mysql57/bin/mysql Ver 14.14 Distrib 5.7.21, for linux-glibc2.12 (x86_64) using EditLine wrapperConnection id: 9
Current database:
Current user: test_user@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 5.7.21-log MySQL Community Server (GPL)
Protocol version: 10
Connection: Localhost via UNIX socket从Current user可以看到用户是xx@localhost, 连接方式为Localhost via UNIX socket当-h参数为IP的时候，实际上是使用TCP连接的, 实例如下[mysql@mysql-test-83 ~]$ /usr开发云主机域名/local/mysql57/bin/mysql -utest_user -p -h227.0.0.1
Enter password:
========= 省略 ===========mysql> status
————–
/usr/local/mysql57/bin/mysql Ver 14.14 Distrib 5.7.21, for linux-glibc2.12 (x86_64) using EditLine wrapperConnection id: 11
Current database:
Current user: test_user@127.0.0.1
SSL: Cipher in use is DHE-RSA-AES256-SHA
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 5.7.21-log MySQL Community Server (GPL)
Protocol version: 10
Connection: 127.0.0.1 via TCP/IP
Server characterset: utf8从Current user可以看到用户是xx@127.0.0.1, 连接方式为TCP/IP测试方法就是看能不能连接，如果不想看测试过程可以拉到最后看结论创建用户mysql> select version();
+———–+
| version() |
+———–+
| 8.0.11 |
+———–+
1 row in set (0.00 sec)mysql> create user test_user@’%’ identified by ‘test_user’;
Query OK, 0 rows affected (0.07 sec)
使用 localhost 登录
[root@mysql-test-72 ~]# /usr/local/mysql80/bin/mysql -utest_user -p -hlocalhost
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 9
Server version: 8.0.11 MySQL Community Server – GPL
========= 省略 ===========mysql> status
————–
/usr/local/mysql80/bin/mysql Ver 8.0.11 for linux-glibc2.12 on x86_64 (MySQL Community Server – GPL)Connection id: 9
Current database:
Current user: test_user@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 8.0.11 MySQL Community Server – GPL
Protocol version: 10
Connection: Localhost via UNIX socket
…使用 IP 登录[root@mysql-test-72 ~]# /usr/local/mysql80/bin/mysql -utest_user -p -h227.0.0.1
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 8
Server version: 8.0.11 MySQL Community Server – GPL
========= 省略 ===========mysql> status
————–
/usr/local/mysql80/bin/mysql Ver 8.0.11 for linux-glibc2.12 on x86_64 (MySQL Community Server – GPL)Connection id: 8
Current database:
Current user: test_user@127.0.0.1
SSL: Cipher in use is DHE-RSA-AES128-GCM-SHA256
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 8.0.11 MySQL Community Server – GPL
Protocol version: 10
Connection: 127.0.0.1 via TCP/IP结果显示8.0版本的MySQL, % 包括localhost创建 % 用户db83-3306>>create user test_user@’%’ identified by ‘test_user’;
Query OK, 0 rows affected (0.00 sec)使用 localhost 登录[mysql@mysql-test-83 ~]$ /usr/local/mysql57/bin/mysql -utest_user -p -hlocalhost
========= 省略 ===========mysql> status
/usr/local/mysql57/bin/mysql Ver 14.14 Distrib 5.7.21, for linux-glibc2.12 (x86_64) using EditLine wrapperConnection id: 9
Current database:
Current user: test_user@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 5.7.21-log MySQL Community Server (GPL)
Protocol version: 10
Connection: Localhost via UNIX socket
….使用 IP 登录[mysql@mysql-test-83 ~]$ /usr/local/mysql57/bin/mysql -utest_user -p -h227.0.0.1
Enter password:
========= 省略 ===========mysql> status
————–
/usr/local/mysql57/bin/mysql Ver 14.14 Distrib 5.7.21, for linux-glibc2.12 (x86_64) using EditLine wrapperConnection id: 11
Current database:
Current user: test_user@127.0.0.1
SSL: Cipher in use is DHE-RSA-AES256-SHA
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 5.7.21-log MySQL Community Server (GPL)
Protocol version: 10
Connection: 127.0.0.1 via TCP/IP
Server characterset: utf8
…结果显示5.7版本的MySQL, % 包括localhost创建用户db83-3306>>select version();
+————+
| version() |
+————+
| 5.6.10-log |
+————+
1 row in set (0.00 sec)db83-3306>>create user test_user@’%’ identified by ‘test_user’;
Query OK, 0 rows affected (0.00 sec)使用 localhost 登录[mysql@mysql-test-83 ~]$ /usr/local/mysql57/bin/mysql -utest_user -p -hlocalhost
Enter password:
ERROR 1045 (28000): Access denied for user ‘test_user’@’localhost’ (using password: YES)使用 IP 登录[mysql@mysql-test-83 ~]$ /usr/local/mysql57/bin/mysql -utest_user -p -h227.0.0.1
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.6.10-log MySQL Community Server (GPL)
========= 省略 ===========mysql> status
————–
/usr/local/mysql57/bin/mysql Ver 14.14 Distrib 5.7.21, for linux-glibc2.12 (x86_64) using EditLine wrapperConnection id: 3
Current database:
Current user: test_user@127.0.0.1
SSL: Not in use
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 5.6.10-log MySQL Community Server (GPL)
Protocol version: 10
Connection: 127.0.0.1 via TCP/IP
……
————–结果显示MySQL 5.6的%不包括localhost创建用户mysql> select version();
+———–+
| version() |
+———–+
| 5.1.73 |
+———–+
1 row in set (0.00 sec)mysql> create user test_user@’%’ identified by ‘test_user’;
Query OK, 0 rows affected (0.00 sec)使用 localhost 登录[root@chengqm ~]# mysql -utest_user -p
Enter password:
ERROR 1045 (28000): Access denied for user ‘test_user’@’localhost’ (using password: YES)
使用 IP 登录
[root@chengqm ~]# mysql -utest_user -p -h227.0.0.1
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 4901339
Server version: 5.1.73 Source distribution
========= 省略 ===========mysql> status
————–
mysql Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.1Connection id: 4901339
Current database:
Current user: test_user@127.0.0.1
SSL: Not in use
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server version: 5.1.73 Source distribution
Protocol version: 10
Connection: 127.0.0.1 via TCP/IP结果显示 5.1 版本的%不包括localhost创建用户db83-3306>>select version();
+———————+
| version() |
+———————+
| 10.3.11-MariaDB-log |
+———————+
1 row in set (0.000 sec)db83-3306>>create user test_user@’%’ identified by ‘test_user’;
Query OK, 0 rows affected (0.001 sec)使用 localhost 登录[mysql@mysql-test-83 ~]$ /usr/local/mariadb/bin/mysql -utest_user -p -hlocalhost
Enter password:
ERROR 1045 (28000): Access denied for user ‘test_user’@’localhost’ (using password: YES)使用 IP 登录[mysql@mysql-test-83 ~]$ /usr/local/mariadb/bin/mysql -utest_user -p -h227.0.0.1
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 12
Server version: 10.3.11-MariaDB-log MariaDB Server
========= 省略 ===========MariaDB [(none)]> status
————–
/usr/local/mariadb/bin/mysql Ver 15.1 Distrib 10.3.11-MariaDB, for Linux (x86_64) using readline 5.1Connection id: 12
Current database:
Current user: test_user@127.0.0.1
SSL: Not in use
Current pager: stdout
Using outfile: ”
Using delimiter: ;
Server: MariaDB
Server version: 10.3.11-MariaDB-log MariaDB Server
Protocol version: 10
Connection: 127.0.0.1 via TCP/IP结果显示MariaDB 10.3的%不包括localhost感谢你能够认真阅读完这篇文章，希望小编分享的“MySQL新建用户中%包不包括localhost吗”这篇文章对大家有帮助，同时也希望大家多多支持开发云，关注开发云行业资讯频道，更多相关知识等着你来学习!

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