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:
mysqladmin supports the following commands. Some of the commands take an argument following the command name.
Create a new database named
Tell the server to write debug information to the error log.
Beginning with MySQL 5.1.12, this includes information about the Event Scheduler. See Section 19.4.5, “Event Scheduler Status”.
Delete the database named
db_nameand all its tables.
Display the server status variables and their values.
MySQL Enterprise. For expert advice on using server status variables, subscribe to the MySQL Enterprise Monitor. For more information, see http://www.mysql.com/products/enterprise/advisors.html.
Flush all information in the host cache.
Flush all logs.
Reload the grant tables (same as
Clear status variables.
Flush all tables.
Flush the thread cache.
Kill server threads. If multiple thread ID values are given, there must be no spaces in the list.
This is like the
passwordcommand but stores the password using the old (pre-4.1) password-hashing format. (See Section 18.104.22.168, “Password Hashing in MySQL”.)
MySQL Enterprise. For expert advice on the security implications of using the
old-passwordcommand, subscribe to the MySQL Enterprise Monitor. For more information, see http://www.mysql.com/products/enterprise/advisors.html.
Set a new password. This changes the password to
new-passwordfor 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 will need to specify the new password.
new-passwordvalue 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:
mysqladmin password "my new password"
Do not use this command used if the server was started with the
--skip-grant-tablesoption. No password change will be applied. This is true even if you precede the
flush-privilegeson 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.
Check whether the server is alive. 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.
Show a list of active server threads. This is like the output of the
SHOW PROCESSLISTstatement. If the
--verboseoption is given, the output is like that of
SHOW FULL PROCESSLIST. (See Section 22.214.171.124, “
Reload the grant tables.
Flush all tables and close and open log files.
Stop the server.
Start replication on a slave server.
Display a short server status message.
Stop replication on a slave server.
Display the server system variables and their values.
MySQL Enterprise. For expert advice on using server system variables, subscribe to the MySQL Enterprise Monitor. For more information, see http://www.mysql.com/products/enterprise/advisors.html.
Display version information from the server.
All commands can be shortened to any unique prefix. For example:
mysqladmin proc stat+----+-------+-----------+----+---------+------+-------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +----+-------+-----------+----+---------+------+-------+------------------+ | 51 | monty | 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:
The number of seconds the MySQL server has been running.
The number of active threads (clients).
The number of questions (queries) from clients since the server was started.
The number of tables the server has opened.
The number of
reloadcommands the server has executed.
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
[client]option file groups. mysqladmin also supports the options for processing option files described at Section 126.96.36.199.1, “Command-Line Options that Affect Option-File Handling”.
Format Config File Description Introduction Deprecated Removed --compress compress Compress all information sent between the client and the server --connect_timeout=seconds connect_timeout The number of seconds before connection timeout --count=# count The number of iterations to make for repeated command execution --debug[=debug_options] debug Write a debugging log --debug-check debug-check Print debugging information when the program exits 5.1.21 --debug-info debug-info Print debugging information, memory and CPU statistics when the program exits 5.1.14 --default-character-set=charset_name default-character-set Use charset_name as the default character set --force force Continue even if an SQL error occurs --help Display help message and exit --host=host_name host Connect to the MySQL server on the given host --no-beep no-beep Do not beep when errors occur 5.1.17 --password[=password] password The password to use when connecting to the server --pipe On Windows, connect to server via a named pipe --port=port_num port The TCP/IP port number to use for the connection --protocol=type protocol The connection protocol to use --relative relative Show the difference between the current and previous values when used with the --sleep option --shutdown_timeout=seconds shutdown_timeout The maximum number of seconds to wait for server shutdown --silent silent Silent mode --sleep=delay sleep Execute commands repeatedly, sleeping for delay seconds in between --socket=path socket For connections to localhost --ssl-ca=file_name ssl-ca The path to a file that contains a list of trusted SSL CAs --ssl-capath=directory_name ssl-capath The path to a directory that contains trusted SSL CA certificates in PEM format --ssl-cert=file_name ssl-cert The name of the SSL certificate file to use for establishing a secure connection --ssl-cipher=cipher_list ssl-cipher A list of allowable ciphers to use for SSL encryption --ssl-key=file_name ssl-key The name of the SSL key file to use for establishing a secure connection --ssl-verify-server-cert ssl-verify-server-cert The server's Common Name value in its certificate is verified against the host name used when connecting to the server --user=user_name, user The MySQL user name to use when connecting to the server --verbose Verbose mode --version Display version information and exit --vertical vertical Print query output rows vertically (one line per column value) --wait wait If the connection cannot be established, wait and retry instead of aborting
Display a help message and exit.
The directory where character sets are installed. See Section 9.5, “Character Set Configuration”.
Compress all information sent between the client and the server if both support compression.
The number of iterations to make for repeated command execution if the
--sleepoption is given.
Write a debugging log. A typical
'd:t:o,. The default is
Print some debugging information when the program exits. This option was added in MySQL 5.1.21.
Print debugging information and memory and CPU usage statistics when the program exits. This option was added in MySQL 5.1.14.
charset_nameas the default character set. See Section 9.5, “Character Set Configuration”.
Do not ask for confirmation for the
dropcommand. With multiple commands, continue even if an error occurs.
Connect to the MySQL server on the given host.
Suppress the warning beep that is emitted by default for errors such as a failure to connect to the server. This option was added in MySQL 5.1.17.
The password to use when connecting to the server. If you use the short option form (
-p), you cannot have a space between the option and the password. If you omit the
passwordvalue following the
-poption on the command line, mysqladmin prompts for one.
Specifying a password on the command line should be considered insecure. See Section 188.8.131.52, “End-User Guidelines for Password Security”. You can use an option file to avoid giving the password on the command line.
On Windows, connect to the server via a named pipe. This option applies only if the server supports named-pipe connections.
The TCP/IP port number to use for the connection.
The connection protocol to use for connecting to the server. It is useful when the other connection parameters normally would cause a protocol to be used other than the one you want. For details on the allowable values, see Section 4.2.2, “Connecting to the MySQL Server”.
Show the difference between the current and previous values when used with the
--sleepoption. Currently, this option works only with the
Exit silently if a connection to the server cannot be established.
Execute commands repeatedly, sleeping for
delayseconds in between. The
--countoption determines the number of iterations. If
--countis not given, mysqladmin executes commands indefinitely until interrupted.
For connections to
localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.
The MySQL user name to use when connecting to the server.
Verbose mode. Print more information about what the program does.
Display version information and exit.
Print output vertically. This is similar to
--relative, but prints output vertically.
If the connection cannot be established, wait and retry instead of aborting. If a
countvalue is given, it indicates the number of times to retry. The default is one time.
You can also set the following variables by using
--set-variableformat is deprecated and is removed in MySQL 5.5.