mysqladmin - Client for Administering a MariaDB Server
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.
createdb_nameCreate a new database named
db_name.debugTell the server to write debug information to the error log.
This includes information about the Event Scheduler. See , "Event Scheduler Status".
dropdb_nameDelete the database named
db_nameand all its tables.extended-statusDisplay the server status variables and their values.
flush-hostsFlush all information in the host cache.
flush-logsFlush all logs.
flush-privilegesReload the grant tables (same as
reload).flush-statusClear status variables.
flush-tablesFlush all tables.
flush-threadsFlush the thread cache.
killid,id,...Kill server threads. If multiple thread ID values are given, there must be no spaces in the list.
old-passwordnew-passwordThis is like the
passwordcommand but stores the password using the old (pre-4.1) password-hashing format. (See , "Password Hashing in MySQL".)passwordnew-passwordSet 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.If the
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:shell>
mysqladmin password 'my new password'In MariaDB 5.6, the new password can be omitted following the
passwordcommand. 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 ifpasswordis the final command on the mysqladmin command line. Otherwise, the next argument is taken as the password.CautionDo 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 thepasswordcommand withflush-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.pingCheck 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.processlistShow 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 ofSHOW FULL PROCESSLIST. (See , "SHOW PROCESSLISTSyntax".)reloadReload the grant tables.
refreshFlush all tables and close and open log files.
shutdownStop the server.
start-slaveStart replication on a slave server.
statusDisplay a short server status message.
stop-slaveStop replication on a slave server.
variablesDisplay the server system variables and their values.
versionDisplay 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 | 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:
UptimeThe number of seconds the MariaDB server has been running.
ThreadsThe number of active threads (clients).
QuestionsThe number of questions (queries) from clients since the server was started.
Slow queriesThe number of queries that have taken more than
long-query-timeseconds. See , "The Slow Query Log".OpensThe number of tables the server has opened.
Flush tablesThe number of
flush-*,refresh, andreloadcommands the server has executed.Open tablesThe 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. mysqladmin also supports the options for processing option files described at , "Command-Line Options that Affect Option-File Handling".
Table 4.3. mysqladmin Options
| Format | Option File | Description | Introduction | Deprecated | Removed |
|---|---|---|---|---|---|
| --bind-address=ip_address | bind-address | Use the specified network interface to connect to the MariaDB Server | |||
| --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 | |||
| --debug-info | debug-info | Print debugging information, memory and CPU statistics when the program exits | |||
| --default-auth=plugin | default-auth=plugin | The authentication plugin to use | |||
| --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 MariaDB server on the given host | |||
| --no-beep | no-beep | Do not beep when errors occur | |||
| --password[=password] | password | The password to use when connecting to the server | |||
| --pipe | On Windows, connect to server using a named pipe | ||||
| --plugin-dir=path | plugin-dir=path | The directory where plugins are located | |||
| --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=dir_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-crl=file_name | ssl-crl | The path to a file that contains certificate revocation lists | 5.6.3 | ||
| --ssl-crlpath=dir_name | ssl-crlpath | The path to a directory that contains certificate revocation list files | 5.6.3 | ||
| --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 MariaDB 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 |
--help,-?Display a help message and exit.
--bind-address=ip_addressOn a computer having multiple network interfaces, this option can be used to select which interface is employed when connecting to the MariaDB server.
This option is supported beginning with MariaDB 5.6.1.
--character-sets-dir=pathThe directory where character sets are installed. See , "Character Set Configuration".
--compress,-CCompress all information sent between the client and the server if both support compression.
--count=,N-cNThe number of iterations to make for repeated command execution if the
--sleepoption is given.--debug[=,debug_options]-# [debug_options]Write a debugging log. A typical
debug_optionsstring is'd:t:o,. The default isfile_name''d:t:o,/tmp/mysqladmin.trace'.--debug-checkPrint some debugging information when the program exits.
--debug-infoPrint debugging information and memory and CPU usage statistics when the program exits.
--default-auth=pluginThe client-side authentication plugin to use. See , "Pluggable Authentication".
--default-character-set=charset_nameUse
charset_nameas the default character set. See , "Character Set Configuration".--force,-fDo not ask for confirmation for the
dropcommand. With multiple commands, continue even if an error occurs.db_name--host=,host_name-hhost_nameConnect to the MariaDB server on the given host.
--no-beep,-bSuppress the warning beep that is emitted by default for errors such as a failure to connect to the server.
--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 thepasswordvalue following the--passwordor-poption on the command line, mysqladmin prompts for one.Specifying a password on the command line should be considered insecure. See , "End-User Guidelines for Password Security". You can use an option file to avoid giving the password on the command line.
--pipe,-WOn Windows, connect to the server using a named pipe. This option applies only if the server supports named-pipe connections.
--plugin-dir=pathThe directory in which to look for plugins. It may be necessary to specify this option if the
--default-authoption is used to specify an authentication plugin but mysqladmin does not find it. See , "Pluggable Authentication".--port=,port_num-Pport_numThe TCP/IP port number to use for the connection.
--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 , "Connecting to the MariaDB Server".
--relative,-rShow the difference between the current and previous values when used with the
--sleepoption. This option works only with theextended-statuscommand.--silent,-sExit silently if a connection to the server cannot be established.
--sleep=,delay-idelayExecute commands repeatedly, sleeping for
delayseconds in between. The--countoption determines the number of iterations. If--countis not given, mysqladmin executes commands indefinitely until interrupted.--socket=,path-SpathFor connections to
localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.--ssl*Options that begin with
--sslspecify whether to connect to the server using SSL and indicate where to find SSL keys and certificates. See , "SSL Command Options".--user=,user_name-uuser_nameThe MariaDB user name to use when connecting to the server.
--verbose,-vVerbose mode. Print more information about what the program does.
--version,-VDisplay version information and exit.
--vertical,-EPrint 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
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 --.
var_name=value
connect_timeoutThe maximum number of seconds before connection timeout. The default value is 43200 (12 hours).
shutdown_timeoutThe maximum number of seconds to wait for server shutdown. The default value is 3600 (1 hour).