How can I restore the MySQL root user’s full privileges?
I accidentally removed some of the privileges from my MySQL root user, including the ability to alter tables. Is there some way I can restore this user to its original state (with all privileges)?
UPDATE mysql.user SET Grant_priv = 'Y', Super_priv = 'Y' WHERE User = 'root';
# MySQL returned an empty result set (i.e. zero rows).
FLUSH PRIVILEGES ;
# MySQL returned an empty result set (i.e. zero rows).
#1045 - Access denied for user 'root'@'localhost' (using password: YES)
GRANT ALL ON *.* TO 'root'@'localhost'
Solution 1:
If the GRANT ALL
doesn't work, try:
- Stop
mysqld
and restart it with the--skip-grant-tables
option. - Connect to the
mysqld
server with just:mysql
(i.e. no-p
option, and username may not be required). -
Issue the following commands in the mysql client:
UPDATE mysql.user SET Grant_priv='Y', Super_priv='Y' WHERE User='root';
FLUSH PRIVILEGES;
After that, you should be able to run GRANT ALL ON *.* TO 'root'@'localhost';
and have it work.
Solution 2:
If you've deleted your root
user by mistake you can do one thing:
- Stop MySQL service
- Run
mysqld_safe --skip-grant-tables &
- Type
mysql -u root -p
and press enter. - Enter your password
- At the mysql command line enter:
use mysql;
Then execute this query:
insert into `user` (`Host`, `User`, `Password`, `Select_priv`, `Insert_priv`, `Update_priv`, `Delete_priv`, `Create_priv`, `Drop_priv`, `Reload_priv`, `Shutdown_priv`, `Process_priv`, `File_priv`, `Grant_priv`, `References_priv`, `Index_priv`, `Alter_priv`, `Show_db_priv`, `Super_priv`, `Create_tmp_table_priv`, `Lock_tables_priv`, `Execute_priv`, `Repl_slave_priv`, `Repl_client_priv`, `Create_view_priv`, `Show_view_priv`, `Create_routine_priv`, `Alter_routine_priv`, `Create_user_priv`, `ssl_type`, `ssl_cipher`, `x509_issuer`, `x509_subject`, `max_questions`, `max_updates`, `max_connections`, `max_user_connections`)
values('localhost','root','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','','0','0','0','0');
then restart the mysqld
EDIT: October 6, 2018
In case anyone else needs this answer, I tried it today using innodb_version 5.6.36-82.0 and 10.1.24-MariaDB and it works if you REMOVE THE BACKTICKS (no single quotes either, just remove them):
insert into user (Host, User, Password, Select_priv, Insert_priv, Update_priv, Delete_priv, Create_priv, Drop_priv, Reload_priv, Shutdown_priv, Process_priv, File_priv, Grant_priv, References_priv, Index_priv, Alter_priv, Show_db_priv, Super_priv, Create_tmp_table_priv, Lock_tables_priv, Execute_priv, Repl_slave_priv, Repl_client_priv, Create_view_priv, Show_view_priv, Create_routine_priv, Alter_routine_priv, Create_user_priv, ssl_type, ssl_cipher, x509_issuer, x509_subject, max_questions, max_updates, max_connections, max_user_connections)
values('localhost','root','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','','0','0','0','0');
Solution 3:
i also remove privileges of root and database not showing in mysql console when i was a root user, so changed user by mysql>mysql -u 'userName' -p;
and password;
UPDATE mysql.user SET Grant_priv='Y', Super_priv='Y' WHERE User='root';
FLUSH PRIVILEGES;
after this command it all show database's in root .
Thanks
Solution 4:
I had denied insert and reload privileges to root. So after updating permissions, FLUSH PRIVILEGES was not working (due to lack of reload privilege). So I used debian-sys-maint user on Ubuntu 16.04 to restore user.root privileges. You can find password of user.debian-sys-maint from this file
sudo cat /etc/mysql/debian.cnf