MYSQLADMIN(1)

NAME
mysqladmin - a MySQL server administration program

SYNOPSIS

mysqladmin [options] command [command-options] [command [command-options]] ...

DESCRIPTION

mysqladmin is a client for performing administrative operations. You can use it to check the server's configuration and current status, to create and drop databases, and more.

Invoke mysqladmin like this:

    shell> mysqladmin [options] command [command-arg] [command [command-arg]] ...

mysqladmin supports the following commands. Some of the commands take an argument following the command name.

    • create db_name

    Create a new database named db_name.

    • debug

    Tell the server to write debug information to the error log. The connected user must have the SUPER privilege. Format and content of this information is subject to change.

    This includes information about the Event Scheduler. See Section 20.4.5, “Event Scheduler Status”.

    • drop db_name

    Delete the database named db_name and all its tables.

    • extended-status

    Display the server status variables and their values.

    • flush-hosts

    Flush all information in the host cache. See Section 5.1.11.2, “DNS Lookups and the Host Cache”.

    • flush-logs

    Flush all logs.

    • flush-privileges

    Reload the grant tables (same as reload).

    • flush-status

    Clear status variables.

    • flush-tables

    Flush all tables.

    • flush-threads

    Flush the thread cache.

    • kill id,id,...

    Kill server threads. If multiple thread ID values are given, there must be no spaces in the list.

    To kill threads belonging to other users, the connected user must have the SUPER privilege.

    • old-password new_password

    This is like the password command but stores the password using the old (pre-4.1) password-hashing format. (See Section 6.1.2.4, “Password Hashing in MySQL”.)

    • password new_password

    Set a new password. This changes the password to new_password for the account that you use with mysqladmin for connecting to the server. Thus, the next time you invoke mysqladmin (or any other client program) using the same account, you must specify the new password.

        Warning
        Setting a password using mysqladmin should be considered insecure. On some systems, your password becomes visible to system status programs such as ps that may be invoked by other users to display command lines. MySQL clients typically overwrite the command-line password argument with zeros during their initialization sequence. However, there is still a brief interval during which the value is visible. Also, on some systems this overwriting strategy is ineffective and the password remains visible to ps. (SystemV Unix systems and perhaps others are subject to this problem.)

    If the new_password value contains spaces or other characters that are special to your command interpreter, you need to enclose it within quotation marks. On Windows, be sure to use double quotation marks rather than single quotation marks; single quotation marks are not stripped from the password, but rather are interpreted as part of the password. For example:

        shell> mysqladmin password "my new password"

    The new password can be omitted following the password command. In this case, mysqladmin prompts for the password value, which enables you to avoid specifying the password on the command line. Omitting the password value should be done only if password is the final command on the mysqladmin command line. Otherwise, the next argument is taken as the password.

        Caution
        Do not use this command used if the server was started with the --skip-grant-tables option. No password change is applied. This is true even if you precede the password command with flush-privileges on the same command line to re-enable the grant tables because the flush operation occurs after you connect. However, you can use mysqladmin flush-privileges to re-enable the grant table and then use a separate mysqladmin password command to change the password.

    • ping

    Check whether the server is available. The return status from mysqladmin is 0 if the server is running, 1 if it is not. This is 0 even in case of an error such as Access denied, because this means that the server is running but refused the connection, which is different from the server not running.

    • processlist

    Show a list of active server threads. This is like the output of the SHOW PROCESSLIST statement. If the --verbose option is given, the output is like that of SHOW FULL PROCESSLIST. (See Section 13.7.5.30, “SHOW PROCESSLIST Statement”.)

    • reload

    Reload the grant tables.

    • refresh

    Flush all tables and close and open log files.

    • shutdown

    Stop the server.

    • start-slave

    Start replication on a replica server.

    • status

    Display a short server status message.

    • stop-slave

    Stop replication on a replica server.

    • variables

    Display the server system variables and their values.

    • version

    Display version information from the server.

All commands can be shortened to any unique prefix. For example:

    shell> mysqladmin proc stat
    +----+-------+-----------+----+---------+------+-------+------------------+
    | Id | User  | Host      | db | Command | Time | State | Info             |
    +----+-------+-----------+----+---------+------+-------+------------------+
    | 51 | jones | localhost |    | Query   | 0    |       | show processlist |
    +----+-------+-----------+----+---------+------+-------+------------------+
    Uptime: 1473624  Threads: 1  Questions: 39487
    Slow queries: 0  Opens: 541  Flush tables: 1
    Open tables: 19  Queries per second avg: 0.0268

The mysqladmin status command result displays the following values:

    • Uptime

    The number of seconds the MySQL server has been running.

    • Threads

    The number of active threads (clients).

    • Questions

    The number of questions (queries) from clients since the server was started.

    • Slow queries

    The number of queries that have taken more than long_query_time seconds. See Section 5.4.5, “The Slow Query Log”.

    • Opens

    The number of tables the server has opened.

    • Flush tables

    The number of flush-*, refresh, and reload commands the server has executed.

    • Open tables

    The number of tables that currently are open.

If you execute mysqladmin shutdown when connecting to a local server using a Unix socket file, mysqladmin waits until the server's process ID file has been removed, to ensure that the server has stopped properly.

mysqladmin supports the following options, which can be specified on the command line or in the [mysqladmin] and [client] groups of an option file. For information about option files used by MySQL programs, see Section 4.2.2.2, “Using Option Files”.

    • --help, -? Display a help message and exit.

    • --bind-address=ip_address On a computer having multiple network interfaces, use this option to select which interface to use for connecting to the MySQL server.

    • --character-sets-dir=dir_name The directory where character sets are installed. See Section 10.15, “Character Set Configuration”.

    • --compress, -C Compress all information sent between the client and the server if possible. See Section 4.2.6, “Connection Compression Control”.

    • --connect-timeout=value The maximum number of seconds before connection timeout. The default value is 43200 (12 hours).

    • --count=N, -c N The number of iterations to make for repeated command execution if the --sleep option is given.

    • --debug[=debug_options], -# [debug_options] Write a debugging log. A typical debug_options string is d:t:o,file_name. The default is d:t:o,/tmp/mysqladmin.trace.

    This option is available only if MySQL was built using WITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

    • --debug-check Print some debugging information when the program exits.

    This option is available only if MySQL was built using WITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

    • --debug-info Print debugging information and memory and CPU usage statistics when the program exits.

    This option is available only if MySQL was built using WITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

    • --default-auth=plugin A hint about which client-side authentication plugin to use. See Section 6.2.11, “Pluggable Authentication”.

    • --default-character-set=charset_name Use charset_name as the default character set. See Section 10.15, “Character Set Configuration”.

    • --defaults-extra-file=file_name Read this option file after the global option file but (on Unix) before the user option file. If the file does not exist or is otherwise inaccessible, an error occurs. file_name is interpreted relative to the current directory if given as a relative path name rather than a full path name.

    For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.

    • --defaults-file=file_name Use only the given option file. If the file does not exist or is otherwise inaccessible, an error occurs. file_name is interpreted relative to the current directory if given as a relative path name rather than a full path name.

    Exception: Even with --defaults-file, client programs read .mylogin.cnf.

    For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.

    • --defaults-group-suffix=str Read not only the usual option groups, but also groups with the usual names and a suffix of str. For example, mysqladmin normally reads the [client] and [mysqladmin] groups. If the --defaults-group-suffix=_other option is given, mysqladmin also reads the [client_other] and [mysqladmin_other] groups.

    For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.

    • --enable-cleartext-plugin Enable the mysql_clear_password cleartext authentication plugin. (See Section 6.4.1.5, “Client-Side Cleartext Pluggable Authentication”.)

    • --force, -f Do not ask for confirmation for the drop db_name command. With multiple commands, continue even if an error occurs.

    • --host=host_name, -h host_name Connect to the MySQL server on the given host.

    • --login-path=name Read options from the named login path in the .mylogin.cnf login path file. A “login path” is an option group containing options that specify which MySQL server to connect to and which account to authenticate as. To create or modify a login path file, use the mysql_config_editor utility. See mysql_config_editor(1).

    For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.

    • --no-beep, -b Suppress the warning beep that is emitted by default for errors such as a failure to connect to the server.

    • --no-defaults Do not read any option files. If program startup fails due to reading unknown options from an option file, --no-defaults can be used to prevent them from being read.

    The exception is that the .mylogin.cnf file, if it exists, is read in all cases. This permits passwords to be specified in a safer way than on the command line even when --no-defaults is used. (.mylogin.cnf is created by the mysql_config_editor utility. See mysql_config_editor(1).)

    For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.

    • --password[=password], -p[password] The password of the MySQL account used for connecting to the server. The password value is optional. If not given, mysqladmin prompts for one. If given, there must be no space between --password= or -p and the password following it. If no password option is specified, the default is to send no password.

    Specifying a password on the command line should be considered insecure. To avoid giving the password on the command line, use an option file. See Section 6.1.2.1, “End-User Guidelines for Password Security”.

    To explicitly specify that there is no password and that mysqladmin should not prompt for one, use the --skip-password option.

    • --pipe, -W On Windows, connect to the server using a named pipe. This option applies only if the server was started with the named_pipe system variable enabled to support named-pipe connections. In addition, the user making the connection must be a member of the Windows group specified by the named_pipe_full_access_group system variable.

    • --plugin-dir=dir_name The directory in which to look for plugins. Specify this option if the --default-auth option is used to specify an authentication plugin but mysqladmin does not find it. See Section 6.2.11, “Pluggable Authentication”.

    • --port=port_num, -P port_num For TCP/IP connections, the port number to use.

    • --print-defaults Print the program name and all options that it gets from option files.

    For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.

    • --protocol={TCP|SOCKET|PIPE|MEMORY} The transport protocol to use for connecting to the server. It is useful when the other connection parameters normally result in use of a protocol other than the one you want. For details on the permissible values, see Section 4.2.5, “Connection Transport Protocols”.

    • --relative, -r Show the difference between the current and previous values when used with the --sleep option. This option works only with the extended-status command.

    • --secure-auth Do not send passwords to the server in old (pre-4.1) format. This prevents connections except for servers that use the newer password format. This option is enabled by default; use --skip-secure-auth to disable it. This option was added in MySQL 5.6.17.

        Note
        Passwords that use the pre-4.1 hashing method are less secure than passwords that use the native password hashing method and should be avoided. Pre-4.1 passwords are deprecated; expect support for them to be removed in a future MySQL release. For account upgrade instructions, see Section 6.4.1.3, “Migrating Away from Pre-4.1 Password Hashing and the mysql_old_password Plugin”.

        Note
        This option is deprecated; expect it to be removed in a future release. As of MySQL 5.7.5, it is always enabled and attempting to disable it produces an error.

    • --shared-memory-base-name=name On Windows, the shared-memory name to use for connections made using shared memory to a local server. The default value is MYSQL. The shared-memory name is case-sensitive.

    This option applies only if the server was started with the shared_memory system variable enabled to support shared-memory connections.

    • --shutdown-timeout=value The maximum number of seconds to wait for server shutdown. The default value is 3600 (1 hour).

    • --silent, -s Exit silently if a connection to the server cannot be established.

    • --sleep=delay, -i delay Execute commands repeatedly, sleeping for delay seconds in between. The --count option determines the number of iterations. If --count is not given, mysqladmin executes commands indefinitely until interrupted.

    • --socket=path, -S path For connections to localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.

    On Windows, this option applies only if the server was started with the named_pipe system variable enabled to support named-pipe connections. In addition, the user making the connection must be a member of the Windows group specified by the named_pipe_full_access_group system variable.

    • --ssl* Options that begin with --ssl specify whether to connect to the server using SSL and indicate where to find SSL keys and certificates. See the section called “Command Options for Encrypted Connections”.

    • --user=user_name, -u user_name The user name of the MySQL account to use for connecting to the server.

    • --verbose, -v Verbose mode. Print more information about what the program does.

    • --version, -V Display version information and exit.

    • --vertical, -E Print output vertically. This is similar to --relative, but prints output vertically.

    • --wait[=count], -w[count] If the connection cannot be established, wait and retry instead of aborting. If a count value is given, it indicates the number of times to retry. The default is one time.

COPYRIGHT

Copyright © 1997, 2021, Oracle and/or its affiliates.

This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.

This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.

AUTHOR
Oracle Corporation (http://dev.mysql.com/).