If you are completely new to MariaDB and relational databases, you may want to start with the MariaDB Primer. Also, make sure you understand the connection parameters discussed in the Connecting to MariaDB article. Show There are a number of common problems that can occur when connecting to MariaDB. Server Not Running in Specified LocationIf the error you get is something like: mysql -uname -p ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2 "No such file or directory") or mysql -uname -p --port=3307 --protocol=tcp ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (111 "Connection refused") the server is either not running, or not running on the specified port, socket or pipe. Make sure you are using the correct host, port, pipe, socket and protocol options, or alternatively, see Getting, Installing and Upgrading MariaDB, Starting and Stopping MariaDB or Troubleshooting Installation Issues. The socket file can be in a non-standard path. In this case, the If unsure where the Unix socket file is running, it's possible to find this out, for example: netstat -ln | grep mysqld unix 2 [ ACC ] STREAM LISTENING 33209505 /var/run/mysqld/mysqld.sock Unable to Connect from a Remote LocationUsually, the MariaDB server does not by default accept connections from a remote client or connecting with tcp and a hostname and has to be configured to permit these. (/my/maria-10.4) ./client/mysql --host=myhost --protocol=tcp --port=3306 test ERROR 2002 (HY000): Can't connect to MySQL server on 'myhost' (115) (/my/maria-10.4) telnet myhost 3306 Trying 192.168.0.11... telnet: connect to address 192.168.0.11: Connection refused (/my/maria-10.4) perror 115 OS error code 115: Operation now in progress To solve this, see Configuring MariaDB for Remote Client Access Authentication ProblemsNote that from MariaDB 10.4.3, the unix_socket authentication plugin is enabled by default on Unix-like systems. This uses operating system credentials when connecting to MariaDB via the local Unix socket file. See unix_socket authentication plugin for instructions on connecting and on switching to password-based authentication as well as Authentication from MariaDB 10.4 for an overview of the MariaDB 10.4 changes.. Authentication is granted to a particular username/host combination. Passwords are hashed with PASSWORD function. If you have set a password with
the SET PASSWORD statement, or used INSERT or UPDATE to update the permissions table directly, the PASSWORD function must be used at the same time. For example,
If grant tables have been changed directly, the new passwords or authentication data will not immediately be active. A FLUSH PRIVILEGES statement, or the flush-privileges mysqladmin option must be run in order for the changes to take effect. Problems Exporting Query ResultsIf you can run regular queries, but get an authentication error when running the SELECT ... INTO OUTFILE, SELECT ... INTO DUMPFILE or LOAD DATA INFILE statements, you do not have permission to write files to the server. This requires the FILE privilege. See the GRANT article. Access to the Server, but not to a DatabaseIf you can connect to the server, but not to a database, for example: USE test; ERROR 1044 (42000): Access denied for user 'ian'@'localhost' to database 'test' or can connect to a particular database, but not another, for example Option Files and Environment VariablesIt's possible that option files or environment variables may be providing incorrect connection parameters. Check the values provided in any option files read by the client you are using (see mysqld Configuration Files and Groups and the documentation for the particular client you're using - see Clients and Utilities). Option files can usually be suppressed with mysqlimport --no-defaults ... Unable to Connect to a Running Server / Lost root PasswordIf you are unable to connect to a server, for example because you have lost the root
password, you can start the server without using the privilege tables by running the localhost and %You may have created a user with something like: CREATE USER melisa identified by 'password'; This creates a user with the '%' wildcard host. select user,host from mysql.user where user='melisa'; +--------+------+ | user | host | +--------+------+ | melisa | % | +--------+------+ However, you may still be failing to login from localhost. Some setups create anonymous users, including localhost. So the following records exist in the user table: select user,host from mysql.user where user='melisa' or user=''; +--------+-----------+ | user | host | +--------+-----------+ | melisa | % | | | localhost | +--------+-----------+ Since you are connecting from localhost, the anonymous credentials, rather than those for the 'melisa' user, are used. The solution is either to add a new user specific to localhost, or to remove the anonymous localhost user. See Also
Can not connect to MySQL server 111?Cause for 'Can't connect to mysql error 111' error
Usually, this error occurs when mysqld only listens to the localhost interface. When we try to access mysql server on Linux machine using the public IP address, it often shows error 111. However, when localhost and 127.0. 0.1 is used, it is connecting fine.
How do you fix MySQL can't connect to localhost?Go to start- MySQL Installer-community and run again the installer as a re-configuration(you will be asked so). Once asked if you want make MySQL instance to run as a Windows service, check the box. In case would do not work, try unistalling and installing again, and check the box to run MySQL as Windows service.
Can't connect to MySQL connection refused?normally means that there is no MySQL server running on the system or that you are using an incorrect Unix socket file name or TCP/IP port number when trying to connect to the server. You should also check that the TCP/IP port you are using has not been blocked by a firewall or port blocking service.
How do I connect to MySQL80?Launch the MySQL Workbench from the desktop. Click the Local instance MySQL80 button, and click Connect to begin the configuration process. When prompted, enter in the MySQL server root password which was created during the MySQL installation process. Optionally, you may check the Save password in vault check box.
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