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這篇文章主要講解了“分析mysqld的skip-grant-tables選項(xiàng)”,文中的講解內(nèi)容簡單清晰,易于學(xué)習(xí)與理解,下面請大家跟著小編的思路慢慢深入,一起來研究和學(xué)習(xí)“分析mysqld的skip-grant-tables選項(xiàng)”吧!
這個(gè)選項(xiàng)會(huì)導(dǎo)致不使用權(quán)限系統(tǒng)來啟動(dòng)服務(wù)器,它將讓任何用戶可以訪問服務(wù)器并且不受限制的訪問所有數(shù)據(jù)庫。在不使用授權(quán)表啟動(dòng)服務(wù)器后可以通過shell來執(zhí)行mysqladmin flush-privileges或mysqladmin reload命令或者在連接到服務(wù)器后執(zhí)行flush privileges語句來讓正在運(yùn)行的服務(wù)器再次使用授權(quán)表。
使用--skip-grant-tables選項(xiàng)啟動(dòng)服務(wù)器
[root@localhost mysql]# service mysqld stop Shutting down MySQL. SUCCESS! [root@localhost mysql]# service mysqld start --skip-grant-tables Starting MySQL.. SUCCESS!
現(xiàn)在就可以不使用用戶和密碼就可以登錄服務(wù)器
[mysql@localhost ~]$ mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.26-log Source distribution Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
現(xiàn)在可以執(zhí)行mysqladin flush-privileges命令讓正在運(yùn)行的服務(wù)器再次使用授權(quán)表
[mysql@localhost ~]$ mysqladmin flush-privileges
現(xiàn)在不使用用戶和密碼就不能登錄服務(wù)器了,必須使用用戶和密碼才能登錄了
[mysql@localhost ~]$ mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) [mysql@localhost ~]$ mysql -uroot -pabcd mysql mysql: [Warning] Using a password on the command line interface can be insecure. Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.7.26-log Source distribution Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
再次使用--skip-grant-tables選項(xiàng)啟動(dòng)服務(wù)器
[root@localhost mysql]# service mysqld stop Shutting down MySQL.. SUCCESS! [root@localhost mysql]# service mysqld start --skip-grant-tables Starting MySQL.. SUCCESS!
現(xiàn)在就可以不使用用戶和密碼就可以登錄服務(wù)器
[mysql@localhost ~]$ mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.26-log Source distribution Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
現(xiàn)在可以執(zhí)行mysqladin reload命令讓正在運(yùn)行的服務(wù)器再次使用授權(quán)表
mysql@localhost ~]$ mysqladmin reload
現(xiàn)在不使用用戶和密碼就不能登錄服務(wù)器了,必須使用用戶和密碼才能登錄了
[mysql@localhost ~]$ mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) [mysql@localhost ~]$ mysql -uroot -pabcd mysql mysql: [Warning] Using a password on the command line interface can be insecure. Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.7.26-log Source distribution Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
再次使用--skip-grant-tables選項(xiàng)啟動(dòng)服務(wù)器
[root@localhost mysql]# service mysqld stop Shutting down MySQL. SUCCESS! [root@localhost mysql]# service mysqld start --skip-grant-tables Starting MySQL.. SUCCESS!
現(xiàn)在就可以不使用用戶和密碼就可以登錄服務(wù)器
[mysql@localhost ~]$ mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.26-log Source distribution Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
現(xiàn)在可以執(zhí)行flush privileges語句讓正在運(yùn)行的服務(wù)器再次使用授權(quán)表
mysql> flush privileges; Query OK, 0 rows affected (0.12 sec)
現(xiàn)在不使用用戶和密碼就不能登錄服務(wù)器了,必須使用用戶和密碼才能登錄了
[mysql@localhost ~]$ mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) [mysql@localhost ~]$ mysql -uroot -pabcd mysql mysql: [Warning] Using a password on the command line interface can be insecure. Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.7.26-log Source distribution Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
--skip-grant-tables選項(xiàng)也可以在選項(xiàng)文件my.cnf中進(jìn)行設(shè)置。這個(gè)選項(xiàng)還會(huì)導(dǎo)致服務(wù)器在啟動(dòng)過程中禁止加載用戶定義函數(shù)(udf),調(diào)度事件和安裝插件語句中安裝的插件。為了以任何方式來加載插件,使用--plugin-load選項(xiàng)。--skip-grant-tables選項(xiàng)也會(huì)導(dǎo)致disabled_storage_engines系統(tǒng)變量失效。
flush privileges語句可以在服務(wù)器啟動(dòng)后通過執(zhí)行其它操作來隱式執(zhí)行。例如在升級過程中mysql_upgrade程序就會(huì)刷新權(quán)限。
感謝各位的閱讀,以上就是“分析mysqld的skip-grant-tables選項(xiàng)”的內(nèi)容了,經(jīng)過本文的學(xué)習(xí)后,相信大家對分析mysqld的skip-grant-tables選項(xiàng)這一問題有了更深刻的體會(huì),具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是億速云,小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章,歡迎關(guān)注!
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