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操作@H_726_5@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
推荐学习:《mysql视频教程》
这里说的两种连接方法指是执行@H_726_5@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
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 wrapper Connection 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/local/MysqL57/bin/MysqL -utest_user -p -h127.0.0.1 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 wrapper Connection 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
[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 ...
[root@mysqL-test-72 ~]# /usr/local/MysqL80/bin/MysqL -utest_user -p -h127.0.0.1 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@H_726_5@mysqL, %
包括localhost
db83-3306>>create user test_user@'%' identified by 'test_user'; Query OK, 0 rows affected (0.00 seC)
[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 wrapper Connection 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 ....
[MysqL@mysqL-test-83 ~]$ /usr/local/MysqL57/bin/MysqL -utest_user -p -h127.0.0.1 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 wrapper Connection 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@H_726_5@mysqL, %
包括localhost
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)
[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)
[MysqL@mysqL-test-83 ~]$ /usr/local/MysqL57/bin/MysqL -utest_user -p -h127.0.0.1 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 wrapper Connection 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@H_726_5@mysqL 5.6的%
不包括localhost
[root@chengqm ~]# MysqL -utest_user -p Enter password: ERROR 1045 (28000): Access denied for user 'test_user'@'localhost' (using password: YES)
[root@chengqm ~]# MysqL -utest_user -p -h127.0.0.1 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 5.1 Connection 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
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)
[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)
[MysqL@mysqL-test-83 ~]$ /usr/local/mariadb/bin/MysqL -utest_user -p -h127.0.0.1 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 5.1 Connection 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@H_726_5@mariaDb 10.3的%
不包括localhost
版本 | 用户中的% 是否包括localhost |
---|---|
包括 | |
包括 | |
不包括 | |
不包括 | |
不包括 |
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