當root權限失去某些權限後,如何恢復這個權限?
1. 可以進入數據庫,但無update權限:
操作過程:在WINDOWS的DOS窗口下,進入MYSQL安裝目錄的BIN目錄,
運行mysqld-nt --skip-grant-tables,當前窗口將會停止。
另外打開一個命令行窗口,執行mysql 如果提示沒有這個命令,先進入MYSQL的安裝位置下BIN目錄再運行mysql
>use mysql
>update user set Update_priv ='Y' where user = 'root';
如果root 沒有所有數據的權限
更新的MYSQL.USER表的所有字段中爲N的爲Y就可以了。
update user set Select_priv ='Y' where user = 'root';
update user set Insert_priv ='Y' where user = 'root';
update user set Update_priv ='Y' where user = 'root';
update user set Delete_priv ='Y' where user = 'root';
update user set Create_priv ='Y' where user = 'root';
update user set Drop_priv ='Y' where user = 'root';
update user set Reload_priv ='Y' where user = 'root';
update user set Shutdown_priv ='Y' where user = 'root';
update user set Process_priv ='Y' where user = 'root';
update user set File_priv ='Y' where user = 'root';
update user set Grant_priv ='Y' where user = 'root';
update user set References_priv ='Y' where user = 'root';
update user set Index_priv ='Y' where user = 'root';
update user set Alter_priv ='Y' where user = 'root';
update user set Show_db_priv ='Y' where user = 'root';
update user set Super_priv ='Y' where user = 'root';
update user set Create_tmp_table_priv ='Y' where user = 'root';
update user set Lock_tables_priv ='Y' where user = 'root';
update user set Execute_priv ='Y' where user = 'root';
update user set Repl_slave_priv ='Y' where user = 'root';
update user set Repl_client_priv ='Y' where user = 'root';
update user set Create_view_priv ='Y' where user = 'root';
update user set Show_view_priv ='Y' where user = 'root';
update user set Create_routine_priv ='Y' where user = 'root';
update user set Alter_routine_priv ='Y' where user = 'root';
update user set Create_user_priv ='Y' where user = 'root';
update user set Event_priv ='Y' where user = 'root';
update user set Trigger_priv ='Y' where user = 'root';
權限問題最後要保證“mysql.user”表中 host爲“localhost”和“%”都有root的所有權限。
host列是指定登錄的ip,比如說 user=root host=192.168.1.1 ,這裏的意思就是說,root用戶只能通過 192.168.1.1的客戶端去訪問,而%則是個通配符, 如果host=192.168.1.%,那麼就表示 只要是 ip爲host=192.168.1.前綴的客戶端都可以連接,那麼host=%的話則表示所有ip都有權去連接,這也就是爲什麼在開啓遠程連接的時候,大部分人都直接把host改成%的緣故,因爲省事
2. 忘記密碼,無法連接數據庫:
解決辦法:
同樣的,利用命令行,跳過mysql的服務認證
>cd ../bin //進入Mysql路徑下的bin目錄中
>mysqld-nt --skip-grant-tables //讓mysql服務跳過認證運行,保持這個窗口不關閉
(|>bin/safe_mysqld --skip-grant-tables & //Linux下)
>mysql -uroot //另打開一個shell,執行Mysql
>use mysql //切換數據庫爲mysql
>update user set password=password("new_pass") where user="root"; //更新用戶密碼
>flush privileges; //更新Mysql權限表
>exit //退出Mysql
>exit //關閉shell