We were having a MySql Server running in Azure Windows Virtual Machine. We were not using it for the past 6 months. But recently we logged into the Virtual Machine and tried to access the database using MySql Work Bench. But it doesn't accept the password and we were unable to login. So we changed the root password by following the instructions from MySql documentation (Resetting the Root Password: Windows Systems).
Based on the instructions, the following commands were executed to reset the password:
CD C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe
mysqld --no-defaults --datadir="C:\\ProgramData\\MySQL\\MySQL Server 5.7\\Data" --init-file=C:\\mysql-init.txt
After running the command, we were able to resect the password and logged into the Mysql as a Root user via the workbench. But, There were no tables other than tabled named as 'warning' in the databases. Following is the screenshot from the MySql Workbench. You can see the 'warning' tables is having four fields namely id, warning, Bitcoin_Address, and email. But there are no rows having values for these fields.
Is there anyone who knows what is exactly happened here? Any way to recover the missing tables? We were not having any other backup for these databases.
After 1 year 15 days. Most probably you have been hacked. I too had this issue in my raspberry pi server, which I used for the weather monitoring. But thanks don't have that important data to pay for it. Before coming to the conclusion check a few things.
How To Fix Corrupted Tables in MySQL, If not solved then,
log in to your mysql database in the terminal, query SHOW database, query USE database_name, query SHOW TABLES;
as mentioned, if you see only one table named WARNING,
Then, query CHECK TABLE `WARNING`;
In the displayed table, if you see under column Msg_text = OK
Then, query SELECT * FROM `WARNING`;
There you have your answer, A hacker has hacked your database, and is demanding money in bitcoin.
Solution: I don't trust them, they will not return your data. Best don't fall for the trap. Instead, use a strong password in your database, use ssh in your site (if you are using), use a python script to daily backup your database through CRON task.
Sorry, If you are a victim of a hacker. I cannot be of much help then.
Related
Running WAMP localhost server With php 5.6.18 and MySQL 5.7.11 In project that im working on now i need to get some column data form information_schema.COLUMNS table, but information_schema DB is completely empty - 0 rows for every table in this DB For additional information - I have like 10 differnet DB on this MySQL, some are imported some are made from scratch in phpmyadmin.So im completely lost - tried to google but no luck.Maybe i miss something essential and trivial like some configuration of MySQL?
Execute this query:
mysql> SHOW GRANTS;
This will show you that either you are not logging in as the user you intend to use, or that this user lacks permissions on the tables in question.
In this case, the user may have no permissions at all. MySQL has a special permission called USAGE, which may seem slightly deceptively named if you aren't familiar with what it means. It means you can "use" the server -- that is, you can log in. But that is all it means. If you possess only the USAGE ON *.* privilege, this means you have permission to log in to the server, but no permissions on anything else.
The information_schema is integrated with the permissions system. You can't see information about database objects for which you don't have permissions. An empty information_schema.columns table suggests a permissions issue for the user you are using to connect to the server.
Sometimes this may be issue when you copy and paste the database's folders in mysql folder. Don't copy that way. The best way to export the databases using "export" command in "phpmyadmin" or use "mysqldump" command in mysql command line client to copy the data or export data from one to another.It will generate "yourdata.sql" file at the last , You can import that data using "export command in "phpmyadmin" . In your method is successful for "MyISAM" database driver in mysql. Modern mysql servers default database driver is "InnoDB" and it not success in when copy the database data folder on to another machine. If you have copy of previous copy of the databases from the old machine, try to export the "yourdata.sql" file using export method in "phpmyadmin" web interface.
I faced same problem when I transfer/shifted my mysql folder to other location.
And configured DB to point Mysql folder accordingly.
However, Information_schema was not getting updated though rest DB queries were running fine.I could't find proper solution but the way around was from mysql editor (like workbench) do inspect schema.
You will get an option in bottom to 'Information Outdated' and then click on Analyze table. You will find that Information_schema start calculating correct size and other details.
I have recently started using MySQL Workbench, hence I apologise if this is not the proper platform to ask this question. I tried to figure out the solution of my own, but could not find any appropriate one.
Here is my situation: At my workplace, we have a huge set of data about the operational and financial figures such as sales, employee, profit, etc for European companies spread over past 7-8 years and new data keeps coming regularly. However, the problem is we work from different remote locations, me in one city and the other two colleagues in a different city. Normally, we share our work files (.xls/.doc) etc through Dropbox. So, we thought of creating a database in MySQL wherein we all can submit/edit/add this data so that we can filter and analyse this data on several ways once the collection is complete. And we plan to use and access it thereafter. We believe that this is ease a lot of our work. So all I want to know is: can all three of us collaborate simultaeousy (in order to add or edit the data) through workbench Server administration, like the way we collaborate our work through Dropbox? I want to be the host (like the administrator) and then want to allow the access to my colleagues.
Thank you for your time and answer. You may also refer me to any site or link to read more about it.
I think you are a bit confused about what MySQL Workbench is.
MySQL workbench is just a data viewer and administration tool that connects to a MySQL server, there's no data "stored" in MySQL workbench, all the data is stored in the server.
MySQL workbench can:
Connect to a MySQL server
Send SQL instructions and show the results: You can create and drop databases, send SQL queries, create and execute stored procedures and functions... all assuming you have the right privileges.
Perform administration tasks: You can create and drop users, grant or revoke permissions, etcétera
But the fact is: all is stored in a MySQL server... so the answer to your question is: Yes, you can work simmultaneously with your colleagues, if and only if all of you can connect to the same database server (as Mike W commented).
Addressing your comments, and clarifying more details:
MySQL is a database server. When you install it in a computer, all data is stored in that computer (aside from replication and other fine details). You should make regular backups of your data (MySQL has tools for that, one is mysqldump). If you want to access the data stored in your database server, you can do it:
By ussing the command-line client,
By using MySQL workbench or another GUI client program, or
By any program that can connect to the database server (via ODBC or specific libraries).
Focusing on MySQL Workbench, and addressing your specific question: If your machine breaks down, you can install the MySQL Server in any other machine, and load the backup into it. You will have to configure that new machine so that any of your coworkers can connect to it (that may imply that a new set of connection parameters is created).
I am working on Symfony2 Project and am beginner in symfony Framework. I am using XAMPP as webserver. Everything is working properly until system restarts. When I restart my computer the tables of mysql database using by symfony project corrupts automatically.
I am using windows 7 professional 32bit OS.so, is there any problem in mysql?
MySQL tables can become corrupt for several reasons, such as hardware
failure, operating system bugs, viruses and bugs in MySQL. hMailServer
itself does not cause corrupt MySQL tables. hMailServer communicates
with MySQL over TCP/IP using a standardized language.
There's nothing in this language that can cause corrupt tables.
If a MySQL table becomes corrupt, you need to repair it. Note that repairing a corrupt MySQL table may lead to loss of data. It's therefore important to create a backup of your system.
How do you know whether a table is corrupt?
Examine the hMailServer error log. If you see a lot of Error while executing SQL statement-messages, then it's likely that one or more of your tables are corrupt. Feel free to ask in the forum if you're unsure.
Step 1: Determine MySQL password
If you are using an external version of MySQL, you should already know your MySQL password.
If you are using the built-in MySQL version that comes with hMailServer, you might not know your password. To determine it, follow these steps:
Run the script hMailServer/Addons/Utilities/DecryptBlowfish.vbs.
Enter your main hMailServer Administrator password. This is the
password you specified during the installation when you first
installed hMailServer. Click OK.
Open up hMailserver.ini, located in your Windows directory or
hMailServer bin directory.
Copy the database password from hMailServer.ini to the "Enter
encrypted password" dialog. In hMailServer.ini, you should see a
line looking like this: [Database]
...
password=c85dae3cb73394ab
In this example, c85dae3cb73394ab is the encrypted password.
Click OK in DecryptBlowfish to view your password
DecryptBlowfish will now show your password. Either keep the dialog open or memorize the password.
Step 2: Connect to the server
To be able to repair your table, you need to connect to the MySQL server using a MySQL client. You can use SQLyog for this.
Download and install SQLyog
Create a new connection.
Enter the connection information for your MySQL server. If you are
using the built-in server, you should enter hostname: localhost,
user:root, password:password from DecryptBlowfish, port:3307
Click Connect to connect to the database server
Step 3: Repair the table
Follow these steps to run the SQL statement to repair the table.
In the tree to the left, click on the hmailserver database.
The hMailServer database will now be active.
In the right part of the SQLyog window, click on the Query tab.
Enter REPAIR TABLE tablename, for example, REPAIR TABLE hm_messages.
Click on the Execute Current Query button in the toolbar (or select
Edit->Execute Query->Execute current query or press F5).
MySQL should now repair the table. After the table has been repaired, restart the MySQL and than the hMailServer service. Depending on what table is corrupt, a restart of the services may not be required, but we recommend that you always do it.
Source
My situation is like this:
I have two servers, one is a windows server running IIS and holds my web site.
The other is a linux server that holds my mysql server.
I created a (mysql) user on the mysql server with a minimum set of privileges, and I use its credentials when connecting from my website to run queries.
But when I run a query, and check the processes that are running on the mysql server (mysql> show processlist), I see that the query I executes (from the web site) is being run under the (mysql) root account!
Any idea why this should happen??
Hituptony got it :-)
My query was processed by a SP, and turned into a prepared statement and then run...
That SP was defined with the root account (god knows why), and more ever didn't have the "invoker" security clause.
http://dev.mysql.com/doc/refman/5.5/en/stored-programs-security.html
I guess it would depend on what you are doing, if you are running a stored procedure and it is created by a root account, then when you run it it will still show the "user who created" it as the one running it, when in reality it is probably the connection user. In theory if you are running a select statement you would therein be running as the connection user, as there would be no "creator" to the select...if you catch my driftage...
I am very sure that i didn't delete my database and noone else sits on my machine. Then how did i my database get deleted automatically? I had 10 tables in it :(. Infact 2 databases got deleted automatically. They are not being shown in mysql query browser. How can i recover my databases back? Is there any query which will help to show the logs to see if the delete schema command was actually fired in mysql? I am very much frustrated. Please help. The last time i saw these database alive was before 2 weeks and today they are no more.
could be you are looking at them with a different user credentials that does not have sufficient privileges to see them?
What tool are you using to view them? command line, phpmyadmin etc?
Yes there are logs you can go through see here
Your database is not deleted from MySQL. You would have set your own user and password in user table when you created these tables. However the when You open my SQL it takes root as the user by default and password as NULL. So to fix it and to see your database and tables you need to set your username and password in config file of MySql.
Example:- If your username and password is XYZ you need to set them as below in config file(config.inc).
path for this file would be:-C:\wamp\apps\phpmyadmin4.1.14 (depending on the version you have installed)
$cfg['Servers'][$i]['user'] = 'XYZ';
$cfg['Servers'][$i]['password'] = 'XYZ';
We had similar problem where we lost all the tables of the database but the database remains as it is in the mysql. The problem and the solution is as follows:
Check where you have installed your MYSQL/XAMPP/WAMP
Check whether you have all the permissions to install the MYSQL/XAMPP at the
place where you have installed your XAMPP/MYSQL on your desktop/server.
The solutions is simple, just re-install your XAMPP/MYSQL on your desktop/any other location where you have permission to install.
Your will not get this problem in future.
Please do not forget to check your error logs and take necessary actions after checking logs daily.