mysqladmin - Unix, Linux Command
NAME
mysqladmin - client for administering a MySQL server
SYNOPSIS
Tag | Description |
mysqladmin [options] command [command-options] [command [command-options]] ...
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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]] ...
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mysqladmin
supports the following commands. Some of the commands take an argument following the command name.
o
Tag | Description |
o
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create db_name
Create a new database named
db_name.
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o
Tag | Description |
o
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debug
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\(rq.
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o
Tag | Description |
o
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drop db_name
Delete the database named
db_name
and all its tables.
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o
Tag | Description |
o
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extended-status
Display the server status variables and their values.
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o
Tag | Description |
o
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flush-hosts
Flush all information in the host cache.
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o
Tag | Description |
o
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flush-logs
Flush all logs.
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o
Tag | Description |
o
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flush-privileges
Reload the grant tables (same as
reload).
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o
Tag | Description |
o
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flush-status
Clear status variables.
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o
Tag | Description |
o
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flush-tables
Flush all tables.
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o
Tag | Description |
o
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flush-threads
Flush the thread cache.
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o
Tag | Description |
o
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kill id,id,...
Kill server threads. If multiple thread ID values are given, there must be no spaces in the list.
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o
Tag | Description |
o
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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 5.3.2.3, \(lqPassword Hashing in MySQL\(rq.)
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o
Tag | Description |
o
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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 will need to specify the new password.
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:
Tag | Description |
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shell> mysqladmin password "my new password"
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Tag | Description |
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Caution
Do not use this command used if the server was started with the
--skip-grant-tables
option. 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 the password.
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o
Tag | Description |
o
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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.
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o
Tag | Description |
o
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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 12.4.5.31, \(lqSHOW PROCESSLIST Syntax\(rq.)
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o
Tag | Description |
o
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reload
Reload the grant tables.
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o
Tag | Description |
o
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refresh
Flush all tables and close and open log files.
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o
Tag | Description |
o
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shutdown
Stop the server.
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o
Tag | Description |
o
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start-slave
Start replication on a slave server.
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o
Tag | Description |
o
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status
Display a short server status message.
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o
Tag | Description |
o
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stop-slave
Stop replication on a slave server.
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o
Tag | Description |
o
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variables
Display the server system variables and their values.
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o
Tag | Description |
o
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version
Display version information from the server.
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All commands can be shortened to any unique prefix. For example:
shell> 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
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The
mysqladmin status
command result displays the following values:
o
Tag | Description |
o
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Uptime
The number of seconds the MySQL server has been running.
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o
Tag | Description |
o
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Threads
The number of active threads (clients).
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o
Tag | Description |
o
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Questions
The number of questions (queries) from clients since the server was started.
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o
Tag | Description |
o
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Slow queries
The number of queries that have taken more than
long_query_time
seconds. See
Section 5.2.5, \(lqThe Slow Query Log\(rq.
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o
Tag | Description |
o
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Opens
The number of tables the server has opened.
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o
Tag | Description |
o
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Flush tables
The number of
flush-*,
refresh, and
reload
commands the server has executed.
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o
Tag | Description |
o
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Open tables
The number of tables that currently are open.
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o
Tag | Description |
o
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Memory in use
The amount of memory allocated directly by
mysqld. This value is displayed only when MySQL has been compiled with
--with-debug=full.
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o
Tag | Description |
o
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Maximum memory used
The maximum amount of memory allocated directly by
mysqld. This value is displayed only when MySQL has been compiled with
--with-debug=full.
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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]
option file groups.
mysqladmin
also supports the options for processing option files described at
Section 4.2.3.3.1, \(lqCommand-Line Options that Affect Option-File Handling\(rq.
o
Tag | Description |
o
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--help,
-?
Display a help message and exit.
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o
Tag | Description |
o
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--bind-address=ip_address
On a computer having multiple network interfaces, this option can be used to select which interface is employed when connecting to the MySQL server.
This option is supported only in the version of
mysqladmin
that is supplied with MySQL Cluster, beginning with MySQL Cluster NDB 6.3.4. It is not available in standard MySQL 5.1 releases.
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o
Tag | Description |
o
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--character-sets-dir=path
The directory where character sets are installed. See
Section 9.5, \(lqCharacter Set Configuration\(rq.
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o
Tag | Description |
o
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--compress,
-C
Compress all information sent between the client and the server if both support compression.
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o
Tag | Description |
o
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--count=N,
-c N
The number of iterations to make for repeated command execution if the
--sleep
option is given.
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o
Tag | Description |
o
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--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'.
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o
Tag | Description |
o
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--debug-check
Print some debugging information when the program exits. This option was added in MySQL 5.1.21.
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o
Tag | Description |
o
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--debug-info
Print debugging information and memory and CPU usage statistics when the program exits. This option was added in MySQL 5.1.14.
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o
Tag | Description |
o
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--default-character-set=charset_name
Use
charset_name
as the default character set. See
Section 9.5, \(lqCharacter Set Configuration\(rq.
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o
Tag | Description |
o
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--force,
-f
Do not ask for confirmation for the
drop db_name
command. With multiple commands, continue even if an error occurs.
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o
Tag | Description |
o
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--host=host_name,
-h host_name
Connect to the MySQL server on the given host.
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o
Tag | Description |
o
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--no-beep,
-b
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.
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o
Tag | Description |
o
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--password[=password],
-p[password]
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
password
value following the
--password
or
-p
option on the command line,
mysqladmin
prompts for one.
Specifying a password on the command line should be considered insecure. See
Section 5.3.2.2, \(lqEnd-User Guidelines for Password Security\(rq. You can use an option file to avoid giving the password on the command line.
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o
Tag | Description |
o
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--pipe,
-W
On Windows, connect to the server using a named pipe. This option applies only if the server supports named-pipe connections.
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o
Tag | Description |
o
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--port=port_num,
-P port_num
The TCP/IP port number to use for the connection.
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o
Tag | Description |
o
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--protocol={TCP|SOCKET|PIPE|MEMORY}
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, \(lqConnecting to the MySQL Server\(rq.
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o
Tag | Description |
o
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--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.
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o
Tag | Description |
o
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--silent,
-s
Exit silently if a connection to the server cannot be established.
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o
Tag | Description |
o
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--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.
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o
Tag | Description |
o
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--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.
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o
Tag | Description |
o
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--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
Section 5.5.6.3, \(lqSSL Command Options\(rq.
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o
Tag | Description |
o
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--user=user_name,
-u user_name
The MySQL user name to use when connecting to the server.
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o
Tag | Description |
o
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--verbose,
-v
Verbose mode. Print more information about what the program does.
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o
Tag | Description |
o
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--version,
-V
Display version information and exit.
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o
Tag | Description |
o
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--vertical,
-E
Print output vertically. This is similar to
--relative, but prints output vertically.
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o
Tag | Description |
o
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--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.
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You can also set the following variables by using
--var_name=value
The
--set-variable
format is deprecated and is removed in MySQL 5.5.
o
Tag | Description |
o
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connect_timeout
The maximum number of seconds before connection timeout. The default value is 43200 (12 hours).
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o
Tag | Description |
o
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shutdown_timeout
The maximum number of seconds to wait for server shutdown. The default value is 3600 (1 hour).
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COPYRIGHT
Copyright © 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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
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/).
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