If MySQL/MariaDB is not running, you will only see your grep command listed. Start MySQL/MariaDB with the command: CentOS 7 (MariaDB): systemctl start mariadb Ubuntu and Debian (MySQL): service mysqli start or /etc/init.d/mysqlid start Be sure to use the correct username and password for your MySQL user. These are different from your 1&1 IONOS login credentials. The required username and password are set when you create the MySQL database. You will also need to set the correct hostname. Verify the Database Connection From the Command Line Once you know that MySQL/MariaDB is running, the next step is to connect from the command line with the command: mysqli -u root -pmixe Error number: 1002; Symbol: ER_NO; SQLSTATE: HY000 Message: NO Used in the construction of other messages. Error number: 1003; Symbol: ER_YES; SQLSTATE: HY000 Message: YES Used in the construction of other messages. Extended EXPLAIN format generates Note messages. ER_YES is used in the Code column for these messages in subsequent SHOW WARNINGS output. Error number: 1004; Symbol: ER_CANT_CREATE_FILE; SQLSTATE: HY000 Message: Can`t create file `%s` (errno: %d - %s) Occurs for failure to create or copy a file needed for some operation. Possible causes: Permissions problem for source file; destination file already exists but is not writeable. Error number: 1005; Symbol: ER_CANT_CREATE_TABLE; SQLSTATE: HY000 Message: Can`t create table `%s` (errno: %d - %s) InnoDB reports this error when a table cannot be created. If the error message refers to error 150, table creation failed because a foreign key constraint was not correctly formed. If the error message refers to error ?1, table creation probably failed because the table includes a column name that matched the name of an internal InnoDB table. Error number: 1006; Symbol: ER_CANT_CREATE_DB; SQLSTATE: HY000 Message: Can`t create database `%s` (errno: %d - %s) Error number: 1007; Symbol: ER_DB_CREATE_EXISTS; SQLSTATE: HY000 Message: Can`t create database `%s`; database exists An attempt to create a database failed because the database already exists. Drop the database first if you really want to replace an existing database, or add an IF NOT EXISTS clause to the CREATE DATABASE statement if to retain an existing database without having the statement produce an error. Error number: 1008; Symbol: ER_DB_DROP_EXISTS; SQLSTATE: HY000 Message: Can`t drop database `%s`; database doesn`t exist Error number: 1010; Symbol: ER_DB_DROP_RMDIR; SQLSTATE: HY000 Message: Error dropping database (can`t rmdir `%s`, errno: %d - %s) Error number: 1012; Symbol: ER_CANT_FIND_SYSTEM_REC; SQLSTATE: HY000 Message: Can`t read record in system table Returned by InnoDB for attempts to access InnoDB INFORMATION_SCHEMA tables when InnoDB is unavailable. Error number: 1013; Symbol: ER_CANT_GET_STAT; SQLSTATE: HY000 Message: Can`t get status of `%s` (errno: %d - %s) Error number: 1015; Symbol: ER_CANT_LOCK; SQLSTATE: HY000 Message: Can`t lock file (errno: %d - %s) Error number: 1016; Symbol: ER_CANT_OPEN_FILE; SQLSTATE: HY000 Message: Can`t open file: `%s` (errno: %d - %s) InnoDB reports this error when the table from the InnoDB data files cannot be found. Error number: 1017; Symbol: ER_FILE_NOT_FOUND; SQLSTATE: HY000 Message: Can`t find file: `%s` (errno: %d - %s) Error number: 1018; Symbol: ER_CANT_READ_DIR; SQLSTATE: HY000 Message: Can`t read dir of `%s` (errno: %d - %s) Error number: 1020; Symbol: ER_CHECKREAD; SQLSTATE: HY000 Message: Record has changed since last read in table `%s` Error number: 1022; Symbol: ER_DUP_KEY; SQLSTATE: 23000 Message: Can`t write; duplicate key in table `%s` Error number: 1024; Symbol: ER_ERROR_ON_READ; SQLSTATE: HY000 Message: Error reading file `%s` (errno: %d - %s) Error number: 1025; Symbol: ER_ERROR_ON_RENAME; SQLSTATE: HY000 Message: Error on rename of `%s` to `%s` (errno: %d - %s)