MySQL Commands for the Linux Command Line for Database Administration in Linux ~ Dons Deals

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20 MySQL (Mysqladmin) Commands for Database Administration in Linux

Written By Ravi Saive in: CentOS, Fedora, Linux Commands, Linux Distros, RedHat, Ubuntu

mysqladmin is a command-line utility the comes with MySQL server and it is used by Database Administrators to perform some basic MySQL tasks easily such as setting root password, changing root password, monitoring mysql processes, reloading privileges, checking server status etc.

In this article we’ve compiled some very useful ‘mysqladmin‘ commands that are used by system/database administrators in their day-to-day work. You must have MySQL server installed on your system to perform these tasks.

20 mysqladmin commands examples

If you don’t have MySQL server installed or you are using older version of MySQL server, then we recommend you all to install or update your version by following our below article.

Installation of MySQL 5.5.28 Server on RHEL/CentOS/Fedora

1. How to set MySQL Root password?

If you have fresh installation of MySQL server, then it doesn’t required any password to connect it as root user. To set MySQL password for root user, use the following command.

# mysqladmin -u root password YOURNEWPASSWORD

2. How to Change MySQL Root password?

If you would like to change or update MySQL root password, then you need to type the following command. For example, say your old password is 123456 and you want to change it with new password say xyz123.

mysqladmin -u root -p123456 password 'xyz123'

3. How to check MySQL Server is running?

To find out whether MySQL server is up and running, use the following command.

# mysqladmin -u root -p ping    Enter password:  mysqld is alive

4. How to Check which MySQL version I am running?

The following command shows MySQL version along with the current running status .

# mysqladmin -u root -p version    Enter password:  mysqladmin  Ver 8.42 Distrib 5.5.28, for Linux on i686  Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.    Oracle is a registered trademark of Oracle Corporation and/or its  affiliates. Other names may be trademarks of their respective  owners.    Server version          5.5.28  Protocol version        10  Connection              Localhost via UNIX socket  UNIX socket             /var/lib/mysql/mysql.sock  Uptime:                 7 days 14 min 45 sec    Threads: 2  Questions: 36002  Slow queries: 0  Opens: 15  Flush tables: 1  Open tables: 8  Queries per second avg: 0.059

4. How to Find out current Status of MySQL server?

To find out current status of MySQL server, use the following command. The mysqladmin command shows the status of uptime with running threads and queries.

# mysqladmin -u root -ptmppassword status    Enter password:  Uptime: 606704  Threads: 2  Questions: 36003  Slow queries: 0  Opens: 15  Flush tables: 1  Open tables: 8  Queries per second avg: 0.059

6. How to check status of all MySQL Server Variable’s and value’s?

To check all the running status of MySQL server variables and values, type the following command. The output would be similar to below.

# mysqladmin -u root -p extended-status    Enter password:  +------------------------------------------+-------------+  | Variable_name                            | Value       |  +------------------------------------------+-------------+  | Aborted_clients                          | 3           |  | Aborted_connects                         | 3           |  | Binlog_cache_disk_use                    | 0           |  | Binlog_cache_use                         | 0           |  | Binlog_stmt_cache_disk_use               | 0           |  | Binlog_stmt_cache_use                    | 0           |  | Bytes_received                           | 6400357     |  | Bytes_sent                               | 2610105     |  | Com_admin_commands                       | 3           |  | Com_assign_to_keycache                   | 0           |  | Com_alter_db                             | 0           |  | Com_alter_db_upgrade                     | 0           |  | Com_alter_event                          | 0           |  | Com_alter_function                       | 0           |  | Com_alter_procedure                      | 0           |  | Com_alter_server                         | 0           |  | Com_alter_table                          | 0           |  | Com_alter_tablespace                     | 0           |  +------------------------------------------+-------------+

7. How to see all MySQL server Variables and Values?

To see all the running variables and values of MySQL server, use the command as follows.

# mysqladmin  -u root -p variables    Enter password:  +---------------------------------------------------+----------------------------------------------+  | Variable_name                                     | Value                                        |  +---------------------------------------------------+----------------------------------------------+  | auto_increment_increment                          | 1                                            |  | auto_increment_offset                             | 1                                            |  | autocommit                                        | ON                                           |  | automatic_sp_privileges                           | ON                                           |  | back_log                                          | 50                                           |  | basedir                                           | /usr                                         |  | big_tables                                        | OFF                                          |  | binlog_cache_size                                 | 32768                                        |  | binlog_direct_non_transactional_updates           | OFF                                          |  | binlog_format                                     | STATEMENT                                    |  | binlog_stmt_cache_size                            | 32768                                        |  | bulk_insert_buffer_size                           | 8388608                                      |  | character_set_client                              | latin1                                       |  | character_set_connection                          | latin1                                       |  | character_set_database                            | latin1                                       |  | character_set_filesystem                          | binary                                       |  | character_set_results                             | latin1                                       |  | character_set_server                              | latin1                                       |  | character_set_system                              | utf8                                         |  | character_sets_dir                                | /usr/share/mysql/charsets/                   |  | collation_connection                              | latin1_swedish_ci                            |  +---------------------------------------------------+----------------------------------------------+

8. How to check all the running Process of MySQL server?

The following command will display all the running process of MySQL database queries.

# mysqladmin -u root -p processlist    Enter password:  +-------+---------+-----------------+---------+---------+------+-------+------------------+  | Id    | User    | Host            | db      | Command | Time | State | Info             |  +-------+---------+-----------------+---------+---------+------+-------+------------------+  | 18001 | rsyslog | localhost:38307 | rsyslog | Sleep   | 5590 |       |                  |  | 18020 | root    | localhost       |         | Query   | 0    |       | show processlist |  +-------+---------+-----------------+---------+---------+------+-------+------------------+

9. How to create a Database in MySQL server?

To create a new database in MySQL server, use the command as shown below.

# mysqladmin -u root -p create databasename    Enter password:

# mysql -u root -p    Enter password:  Welcome to the MySQL monitor.  Commands end with ; or \g.  Your MySQL connection id is 18027  Server version: 5.5.28 MySQL Community Server (GPL) by Remi    Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.    Oracle is a registered trademark of Oracle Corporation and/or its  affiliates. Other names may be trademarks of their respective  owners.    Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.    mysql> show databases;  +--------------------+  | Database           |  +--------------------+  | information_schema |  | databasename       |  | mysql              |  | test               |  +--------------------+  8 rows in set (0.01 sec)    mysql>

10. How to drop a Database in MySQL server?

To drop a Database in MySQL server, use the following command. You will be asked to confirm press ‘y‘.

# mysqladmin -u root -p drop databasename    Enter password:  Dropping the database is potentially a very bad thing to do.  Any data stored in the database will be destroyed.    Do you really want to drop the 'databasename' database [y/N] y  Database "databasename" dropped