mysql数据库root权限丢失(密码丢失)
今天同事,调整MySQL安全,在删除用户的时候误删了 root@localhost,后来加进去了,但是在登录发现数据库很多库都没有了,顿时懵逼,考虑恢复数据,稍后我看到了,想起当年也出现过类似情况,主要是因为root用户没有权限,所以跳过授权表,经过查询权限,真的缺少,所以将其都由N改为Y ,在次测试,OK,以下是处理步骤。
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第一步,跳过授权表登录mysql
1、pkill 停止 实例进程 2、mysqld_safe --defaults-file=/data/3306/my.cnf --skip-grant-tables & 3、mysql -S /data/3306/mysql.sock 4、UPDATE mysql.user SET password=PASSWORD('oldboy123') WHERE user='root' and host='localhost'; 5、flush privileges; 6、kill掉mysqld_safe 进程 7、/etc/init.d/msyql start 正常启动 登录即可 mysql -uroot -poldboy123
第二步、修改权限(也可以初始化root密码)
mysql> use mysql; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | oldboy_gbk | | performance_schema | | qiuyuetao | | test | +--------------------+ 6 rows in set (0.00 sec) mysql> show tables; +---------------------------+ | Tables_in_mysql | +---------------------------+ | columns_priv | | db | | event | | func | | general_log | | help_category | | help_keyword | | help_relation | | help_topic | | host | | ndb_binlog_index | | plugin | | proc | | procs_priv | | proxies_priv | | servers | | slow_log | | tables_priv | | time_zone | | time_zone_leap_second | | time_zone_name | | time_zone_transition | | time_zone_transition_type | | user | +---------------------------+ 24 rows in set (0.00 sec) 更新的MYSQL.USER表的所有字段中为N的为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';
本文题目:mysql数据库root权限丢失(密码丢失)
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