Skip to main content

MySQL reset root user password

MySQL reset root user password:

Check MySQL status:
strace -e stat64 mysqld --print-defaults > /dev/null

When you don't know mysql user password and would like to reset password:
https://dev.mysql.com/doc/refman/5.7/en/resetting-permissions.html

# service mysql stop
# mysqld_safe --skip-grant-tables &
# mysql -u root
mysql> show databases;
mysql> use mysql
mysql> UPDATE mysql.user SET authentication_string = PASSWORD('mysql'), password_expired = 'N' WHERE User = 'root' AND Host = 'localhost';
mysql> flush privileges;
mysql> quit
# service mysql stop
# service mysql start

Get temporary password for mysql user root, after installation:

# grep 'temporary password' /var/log/mysqld.log
[Server] A temporary password is generated for root@localhost: #=lkkq7kpuFj

$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.11

Copyright (c) 2000, 2018, 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> ALTER USER 'root'@'localhost' IDENTIFIED BY 'newcode';
Query OK, 0 rows affected (0.03 sec)




Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

MySQL InnoDB cluster troubleshooting | commands

Cluster Validation: select * from performance_schema.replication_group_members; All members should be online. select instance_name, mysql_server_uuid, addresses from  mysql_innodb_cluster_metadata.instances; All instances should return same value for mysql_server_uuid SELECT @@GTID_EXECUTED; All nodes should return same value Frequently use commands: mysql> SET SQL_LOG_BIN = 0;  mysql> stop group_replication; mysql> set global super_read_only=0; mysql> drop database mysql_innodb_cluster_metadata; mysql> RESET MASTER; mysql> RESET SLAVE ALL; JS > var cluster = dba.getCluster() JS > var cluster = dba.getCluster("<Cluster_name>") JS > var cluster = dba.createCluster('name') JS > cluster.removeInstance('root@<IP_Address>:<Port_No>',{force: true}) JS > cluster.addInstance('root@<IP add>,:<port>') JS > cluster.addInstance('root@ <IP add>,:<port> ') JS > dba.getC...
Post a Comment
Read more

InnoDB cluster Remove Instance Force | Add InnoDB instance

InnoDB cluster environment UUID is different on node: To fix it stop group replication, remove instance (use force if require), add instance back Identify the node which is not in sync: Execute following SQL statement on each node and identify the node has different UUID on all nodes. mysql> select * from mysql_innodb_cluster_metadata.instances; Stop group replication: Stop group replication on the node which does not have same UUID on all nodes. mysql > stop GROUP_REPLICATION; Remove instances from cluster: Remove all secondary node from the cluster and add them back if require. $mysqlsh JS >\c root@<IP_Address>:<Port_No> JS > dba.getCluster().status() JS > dba.getCluster () <Cluster:cluster_name> JS > var cluster = dba.getCluster("cluster_name"); JS >  cluster.removeInstance('root@<IP_Address>:<Port_No>'); If you get "Cluster.removeInstance: Timeout reached waiting......" JS > cluster.removeInstance(...
2 comments
Read more

Oracle E-Business Suite Online Patch Phases executing adop

Following description about Oracle E-Business Suite is high level and from documentation https://docs.oracle.com/cd/E26401_01/doc.122/e22954/T202991T531062.htm#5281339 for in depth and detail description refer it. The online patching cycle phases: Prepare Apply Finalize Cutover Cleanup Prepare phase: Start a new online patching cycle, Prepares the environment for patching. $ adop phase=prepare Apply phase: Applies the specified patches to the environment. Apply one or more patches to the patch edition. $ adop phase=apply patches=123456,789101 workers=8 Finalize phase: Performs any final steps required to make the system ready for cutover. Perform the final patching operations that can be executed while the application is still online. $ adop phase=finalize Cutover phase: Shuts down application tier services, makes the patch edition the new run edition, and then restarts application tier services. This is the only phase that involves a brief ...
Post a Comment
Read more