Can't reset root password with --skip-grant-tables on ubuntu 16
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I am trying to reset the root password following MysqlPasswordReset but when I try to start the server with --skip-grant-tables the server doesn't start
- Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-59-generic x86_64)
- mysql Ver 14.14 Distrib 5.7.17, for Linux (x86_64)
Server is running
$ mysql -u root ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
$ sudo /etc/init.d/mysql stop [ ok ] Stopping mysql (via systemctl): mysql.service.
Trying to start with --skip-grant-tables
sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking &  9856
Connect with no password
$ mysql -u root ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) + Exit 1 sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking
I also tried to start with mysql_safe (error.log is empty)
sudo mysqld_safe --skip-grant-tables 2017-02-01T16:33:31.382105Z mysqld_safe Logging to syslog. 2017-02-01T16:33:31.383942Z mysqld_safe Logging to '/var/log/mysql/error.log'. 2017-02-01T16:33:31.386058Z mysqld_safe Logging to '/var/log/mysql/error.log'. 2017-02-01T16:33:31.388009Z mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists.
I found that the mysql.sock is deleted when the mysql service is stoped and mysqld_safe can't create it (I couldn't find the reason), so my solution was back up the sock folder and restore before start mysqld_safe
$ sudo service mysql start
Go to sock folder
$ cd /var/run
Back up the sock
$ sudo cp -rp ./mysqld ./mysqld.bak
$ sudo service mysql stop
Restore the sock
$ sudo mv ./mysqld.bak ./mysqld
$ sudo mysqld_safe --skip-grant-tables --skip-networking &
Init mysql shell
mysql -u root
FLUSH PRIVILEGES; SET PASSWORD FOR root@'localhost' = PASSWORD('my_new_password');
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pedronalbert's answer above worked for me but the last step is now deprecated and throws the following warning:
Warning | 1287 | 'SET PASSWORD FOR = PASSWORD('')' is deprecated and will be removed in a future release. Please use SET PASSWORD FOR = '' instead
Use this command instead:
SET PASSWORD FOR root = '<plaintext_password>';
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I tried many ways including @pedronalbert 's but still not working.
The way I solved it is adding "skip-grant-tables" in /etc/my.cnf then start mysql service and connecting mysql with "mysql -u root" as https://www.codero.com/knowledge-base/content/33/296/en/how-to-reset-your-root-mysql-password.html
It works in my VM CentOS 7.
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For Ubuntu 19 with MySQL 8.0.17-0ubuntu2, what ended up working for me was a combination of many answers:
In the MySQL's configuration file (
/etc/mysql/mysql.conf.d/mysqld.cnfon my machine), under
skip-grant-tables = 1 plugin-load-add = auth_socket.so
Restart the MySQL Service;
Connect to MySQL:
UPDATE mysql.user SET authentication_string=null WHERE User='root'; FLUSH PRIVILEGES; ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'pass123';
Stop MySQL and comment
skip-grant-tablesin the configuration file;
Start MySQL again and this should now work:
mysql -u root -ppass123.
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- Possible duplicate of ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
- when using safe mode could you make connection using root? Did you try without the
- @davejal Yes, I tried without --skip-networking and I can't connect to the mysql server in safe mode
- I had to set the password that way: stackoverflow.com/questions/37879448/…
- On last command got
ERROR 1524 (HY000): Plugin 'auth_socket' is not loadedon Kubuntu 18.04
- I believe this method is easier – superuser.com/a/1175035/320611
- In mysql 5.7.24, the password column must be changed to authentication_string
- after doing this mysql server didn't start
- looks like they have removed an important functionality. with
--skip-grant-tablesthe auth plugin is not loaded, and we cannot use
set password, so there is no way to seems to revert the password. looks like we need to execute
password('password')on a old mysql server, and copy paste the auth string, and update the table manually.
- This method of configuring
skip-grant-tablesalso works for Ubuntu 19 and MySQL 8.
- This answer doesn't go into enough detail and will most likely not work. You can't just add
skip-grant-tablesrandomly like it says. Check the answer below for the actual complete process to use.
- Note that if you see that the
UPDATEstatement did not alter any rows (e.g.
Query OK, 0 rows affected) it means you don't have a root user. In that case follow the instructions in this other answer to create it before running these queries again.