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. Format and content of this information is subject to change.
Delete the database named
and all its tables.
Display the server status variables and their values.
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. (Added in MySQL 3.23.16.)
Kill server threads. If multiple thread ID values are given, there must be no spaces in the list.
This is like the
password command but
stores the password using the old (pre-4.1) password-hashing
format. This command was added in MySQL 4.1.0. (See
Section 184.108.40.206, “Password Hashing in MySQL”.)
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 will need to specify the new
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
No password change will be 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
Check whether the server is available. The return status
from mysqladmin is 0 if the server is
running, 1 if it is not. Beginning with MySQL 4.0.22, the
status is 0 even in case of an error such as
denied, because that means 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
PROCESSLIST statement. If the
--verbose option is
given, the output is like that of
Section 220.127.116.11, “SHOW PROCESSLIST Syntax”.)
Reload the grant tables.
Flush all tables and close and open log files.
Stop the server.
Start replication on a slave server. (Added in MySQL 3.23.16.)
Display a short server status message.
Stop replication on a slave server. (Added in MySQL 3.23.16.)
Display the server system variables and their values.
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
commands 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
option file groups. mysqladmin also supports
the options for processing option files described at
Section 18.104.22.168.1, “Command-Line Options that Affect Option-File Handling”.
|--compress||Compress all information sent between client and server|
|--connect_timeout=seconds||Number of seconds before connection timeout|
|--count=#||Number of iterations to make for repeated command execution|
|--debug[=debug_options]||Write a debugging log|
|--default-character-set=charset_name||Specify default character set||4.1.9|
|--defaults-extra-file=file_name||Read option file in addition to usual option files|
|--defaults-file=file_name||Read only named option file|
|--force||Continue even if an SQL error occurs|
|--help||Display help message and exit|
|--host=host_name||Connect to MySQL server on given host|
|--no-defaults||Read no option files|
|--password[=password]||Password to use when connecting to server|
|--pipe||On Windows, connect to server using named pipe|
|--port=port_num||TCP/IP port number to use for connection|
|--protocol=type||Connection protocol to use|
|--relative||Show the difference between the current and previous values when used with the --sleep option|
|--shared-memory-base-name=name||The name of shared memory to use for shared-memory connections|
|--shutdown_timeout=seconds||The maximum number of seconds to wait for server shutdown|
|--sleep=delay||Execute commands repeatedly, sleeping for delay seconds in between|
|--socket=path||For connections to localhost, the Unix socket file to use|
|--ssl||Enable SSL for connection|
|--ssl-ca=file_name||Path of file that contains list of trusted SSL CAs|
|--ssl-capath=dir_name||Path of directory that contains trusted SSL CA certificates in PEM format|
|--ssl-cert=file_name||Path of file that contains X509 certificate in PEM format|
|--ssl-cipher=cipher_list||List of permitted ciphers to use for SSL encryption|
|--ssl-key=file_name||Path of file that contains X509 key in PEM format|
|--user=user_name,||MySQL user name to use when connecting to server|
|--version||Display version information and exit|
|--vertical||Print query output rows vertically (one line per column value)|
|--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 9.6, “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
option is given.
Write a debugging log. A typical
debug_options string is
The default is
charset_name as the default
character set. See Section 9.6, “Character Set Configuration”.
Added in MySQL 4.1.9.
Do not ask for confirmation for the
multiple commands, continue even if an error occurs.
Connect to the MySQL server on the given host.
The password to use when connecting to the server. If you
use the short option form (
cannot have a space between the option
and the password. If you omit the
password value following the
-p option on the command line,
mysqladmin prompts for one.
Specifying a password on the command line should be considered insecure. See Section 22.214.171.124, “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 using 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 permissible values, see Section 4.2.2, “Connecting to the MySQL Server”. This option was added in MySQL 4.1.
Show the difference between the current and previous values
when used with the
--sleep option. This
option works only with the
Exit silently if a connection to the server cannot be established.
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
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
If the connection cannot be established, wait and retry
instead of aborting. If a
value is given, it indicates the number of times to retry.
The default is one time.
You can also set the following variables by using
It is also possible to set variables by using
syntax. However, this syntax is deprecated as of MySQL 4.0.