设置更改root密码
[root@iZbp1e0xboek6oow616aoiZ ~]# ps aux|grep mysql
root     10954  0.0  0.0  11768  1480 ?        S    4月19   0:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql --pid-file=/data/mysql/iZbp1e0xboek6oow616aoiZ.pid
mysql    11090  0.0 26.0 1323376 489804 ?      Sl   4月19   7:09 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/iZbp1e0xboek6oow616aoiZ.err --pid-file=/data/mysql/iZbp1e0xboek6oow616aoiZ.pid --socket=/tmp/mysql.sock
root     22896  0.0  0.0 112676   984 pts/0    R+   16:05   0:00 grep --color=auto mysql
[root@iZbp1e0xboek6oow616aoiZ ~]# echo PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
#暂时生效
[root@iZbp1e0xboek6oow616aoiZ ~]# export PATH=PATH:/usr/local/mysql/bin/
#永久生效
[root@iZbp1e0xboek6oow616aoiZ ~]# vim /etc/profile
#在文件最后添加
export PATH=$PATH:/usr/local/mysql/bin/

[root@iZbp1e0xboek6oow616aoiZ ~]# source /etc/profile
#设置密码
[root@iZbp1e0xboek6oow616aoiZ ~]# mysqladmin -uroot password '123456'
Warning: Using a password on the command line interface can be insecure.
#密码登入
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 951
Server version: 5.6.35 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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> quit
Bye
#更改密码
[root@iZbp1e0xboek6oow616aoiZ ~]# mysqladmin -uroot -p'123456'  password '123'
Warning: Using a password on the command line interface can be insecure.
[root@iZbp1e0xboek6oow616aoiZ ~]# mysqladmin -uroot -p'123456'  password '123'
Warning: Using a password on the command line interface can be insecure.
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p'123'
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 955
Server version: 5.6.35 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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> quit
Bye

#密码重置
[root@iZbp1e0xboek6oow616aoiZ ~]# vim /etc/my.cnf
#在[mysqld]中添加skip-grant


[mysqld]
skip-grant
datadir=/data/mysql
socket=/tmp/mysql.sock
symbolic-links=0

[mysqld_safe]

[root@iZbp1e0xboek6oow616aoiZ ~]# /etc/init.d/mysqld restart
Shutting down MySQL..                                      [  确定  ]
Starting MySQL.                                            [  确定  ]
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 4
Server version: 5.6.35 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select password from user;
+-------------------------------------------+
| password                                  |
+-------------------------------------------+
| *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
|                                           |
|                                           |
|                                           |
|                                           |
|                                           |
+-------------------------------------------+
6 rows in set (0.00 sec)

mysql> update user set password=password('123456') where user='root';
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> quit;
Bye

#去掉之前[mysqld]中添加skip-grant
[mysqld]

datadir=/data/mysql
socket=/tmp/mysql.sock
symbolic-links=0

[mysqld_safe]
[root@iZbp1e0xboek6oow616aoiZ ~]# /etc/init.d/mysqld restart
Shutting down MySQL..                                      [  确定  ]
Starting MySQL.                                            [  确定  ]
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p'123456'
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.6.35 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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> quit
Bye

连接MySQL

连接MySQL
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p123456
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p123456 -h127.0.0.1 -P3306
#根据sock连接
[root@iZbp1e0xboek6oow616aoiZ ~]# ps aux|grep mysql
root     23631  0.0  0.0 113264  1596 pts/0    S    16:36   0:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql --pid-file=/data/mysql/iZbp1e0xboek6oow616aoiZ.pid
mysql    23767  0.1 24.2 1105436 457188 pts/0  Sl   16:36   0:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/iZbp1e0xboek6oow616aoiZ.err --pid-file=/data/mysql/iZbp1e0xboek6oow616aoiZ.pid --socket=/tmp/mysql.sock
root     23806  0.0  0.0 112676   980 pts/0    R+   16:41   0:00 grep --color=auto mysql
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p123456 -S/tmp/mysql.sock

#一般shell脚本
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p123456 -e "show databases"
Warning: Using a password on the command line interface can be insecure.
+--------------------+
| Database           |
+--------------------+
| information_schema |
| ecjia              |
| mysql              |
| performance_schema |
| test               |
+--------------------+

MySQL常用命令

MySQL常用命令

MySQL常用命令
[root@iZbp1e0xboek6oow616aoiZ ~]# mysql -uroot -p123456
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 6
Server version: 5.6.35 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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 |
| ecjia              |
| mysql              |
| performance_schema |
| test               |
+--------------------+
5 rows in set (0.00 sec)

mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| innodb_index_stats        |
| innodb_table_stats        |
| ndb_binlog_index          |
| plugin                    |
| proc                      |
| procs_priv                |
| proxies_priv              |
| servers                   |
| slave_master_info         |
| slave_relay_log_info      |
| slave_worker_info         |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+
28 rows in set (0.00 sec)


mysql> desc user;
+------------------------+-----------------------------------+------+-----+-----------------------+-------+
| Field                  | Type                              | Null | Key | Default               | Extra |
+------------------------+-----------------------------------+------+-----+-----------------------+-------+
| Host                   | char(60)                          | NO   | PRI |                       |       |
| User                   | char(16)                          | NO   | PRI |                       |       |
| Password               | char(41)                          | NO   |     |                       |       |
| Select_priv            | enum('N','Y')                     | NO   |     | N                     |       |
| Insert_priv            | enum('N','Y')                     | NO   |     | N                     |       |
| Update_priv            | enum('N','Y')                     | NO   |     | N                     |       |
| Delete_priv            | enum('N','Y')                     | NO   |     | N                     |       |
| Create_priv            | enum('N','Y')                     | NO   |     | N                     |       |
| Drop_priv              | enum('N','Y')                     | NO   |     | N                     |       |
| Reload_priv            | enum('N','Y')                     | NO   |     | N                     |       |
| Shutdown_priv          | enum('N','Y')                     | NO   |     | N                     |       |
| Process_priv           | enum('N','Y')                     | NO   |     | N                     |       |
| File_priv              | enum('N','Y')                     | NO   |     | N                     |       |
| Grant_priv             | enum('N','Y')                     | NO   |     | N                     |       |
| References_priv        | enum('N','Y')                     | NO   |     | N                     |       |
| Index_priv             | enum('N','Y')                     | NO   |     | N                     |       |
| Alter_priv             | enum('N','Y')                     | NO   |     | N                     |       |
| Show_db_priv           | enum('N','Y')                     | NO   |     | N                     |       |
| Super_priv             | enum('N','Y')                     | NO   |     | N                     |       |
| Create_tmp_table_priv  | enum('N','Y')                     | NO   |     | N                     |       |
| Lock_tables_priv       | enum('N','Y')                     | NO   |     | N                     |       |
| Execute_priv           | enum('N','Y')                     | NO   |     | N                     |       |
| Repl_slave_priv        | enum('N','Y')                     | NO   |     | N                     |       |
| Repl_client_priv       | enum('N','Y')                     | NO   |     | N                     |       |
| Create_view_priv       | enum('N','Y')                     | NO   |     | N                     |       |
| Show_view_priv         | enum('N','Y')                     | NO   |     | N                     |       |
| Create_routine_priv    | enum('N','Y')                     | NO   |     | N                     |       |
| Alter_routine_priv     | enum('N','Y')                     | NO   |     | N                     |       |
| Create_user_priv       | enum('N','Y')                     | NO   |     | N                     |       |
| Event_priv             | enum('N','Y')                     | NO   |     | N                     |       |
| Trigger_priv           | enum('N','Y')                     | NO   |     | N                     |       |
| Create_tablespace_priv | enum('N','Y')                     | NO   |     | N                     |       |
| ssl_type               | enum('','ANY','X509','SPECIFIED') | NO   |     |                       |       |
| ssl_cipher             | blob                              | NO   |     | NULL                  |       |
| x509_issuer            | blob                              | NO   |     | NULL                  |       |
| x509_subject           | blob                              | NO   |     | NULL                  |       |
| max_questions          | int(11) unsigned                  | NO   |     | 0                     |       |
| max_updates            | int(11) unsigned                  | NO   |     | 0                     |       |
| max_connections        | int(11) unsigned                  | NO   |     | 0                     |       |
| max_user_connections   | int(11) unsigned                  | NO   |     | 0                     |       |
| plugin                 | char(64)                          | YES  |     | mysql_native_password |       |
| authentication_string  | text                              | YES  |     | NULL                  |       |
| password_expired       | enum('N','Y')                     | NO   |     | N                     |       |
+------------------------+-----------------------------------+------+-----+-----------------------+-------+
43 rows in set (0.00 sec)

mysql> show create table userG;
*************************** 1. row ***************************
       Table: user
Create Table: CREATE TABLE `user` (
  `Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',
  `User` char(16) COLLATE utf8_bin NOT NULL DEFAULT '',
  `Password` char(41) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT '',
  `Select_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Insert_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Update_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Delete_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Drop_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Reload_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Shutdown_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Process_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `File_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Grant_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `References_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Index_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Alter_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Show_db_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Super_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_tmp_table_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Lock_tables_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Execute_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Repl_slave_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Repl_client_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Show_view_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Alter_routine_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_user_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Event_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Trigger_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `Create_tablespace_priv` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  `ssl_type` enum('','ANY','X509','SPECIFIED') CHARACTER SET utf8 NOT NULL DEFAULT '',
  `ssl_cipher` blob NOT NULL,
  `x509_issuer` blob NOT NULL,
  `x509_subject` blob NOT NULL,
  `max_questions` int(11) unsigned NOT NULL DEFAULT '0',
  `max_updates` int(11) unsigned NOT NULL DEFAULT '0',
  `max_connections` int(11) unsigned NOT NULL DEFAULT '0',
  `max_user_connections` int(11) unsigned NOT NULL DEFAULT '0',
  `plugin` char(64) COLLATE utf8_bin DEFAULT 'mysql_native_password',
  `authentication_string` text COLLATE utf8_bin,
  `password_expired` enum('N','Y') CHARACTER SET utf8 NOT NULL DEFAULT 'N',
  PRIMARY KEY (`Host`,`User`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Users and global privileges'
1 row in set (0.00 sec)

ERROR:
No query specified

mysql> select user();
+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)

mysql> select database();
+------------+
| database() |
+------------+
| mysql      |
+------------+
1 row in set (0.00 sec)

mysql> create database db1;
Query OK, 1 row affected (0.01 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| db1                |
| ecjia              |
| mysql              |
| performance_schema |
| test               |
+--------------------+
6 rows in set (0.00 sec)

mysql> create table t1(`id` int(4), `name` char(40));
Query OK, 0 rows affected (0.02 sec)

mysql> show create table t1G;
*************************** 1. row ***************************
       Table: t1
Create Table: CREATE TABLE `t1` (
  `id` int(4) DEFAULT NULL,
  `name` char(40) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
1 row in set (0.00 sec)

ERROR:
No query specified

#改变编码

mysql> drop table t1;
Query OK, 0 rows affected (0.01 sec)

mysql> create table t1(`id` int(4), `name` char(40)) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Query OK, 0 rows affected (0.03 sec)

mysql> show create table t1G;                                                  *************************** 1. row ***************************
       Table: t1
Create Table: CREATE TABLE `t1` (
  `id` int(4) DEFAULT NULL,
  `name` char(40) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8
1 row in set (0.00 sec)

ERROR:
No query specified

mysql> select version();
+-----------+
| version() |
+-----------+
| 5.6.35    |
+-----------+
1 row in set (0.00 sec)

mysql> show status;
+-----------------------------------------------+-------------+
| Variable_name                                 | Value       |
+-----------------------------------------------+-------------+
| Aborted_clients                               | 0           |
| Aborted_connects                              | 0           |
| Binlog_cache_disk_use                         | 0           |
| Binlog_cache_use                              | 0           |
| Binlog_stmt_cache_disk_use                    | 0           |
| Binlog_stmt_cache_use                         | 0           |
| Bytes_received                                | 668         |
| Bytes_sent                                    | 1361        |
| Com_admin_commands                            | 0           |
| 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           |
| Com_alter_user                                | 0           |
| Com_analyze                                   | 0           |
| Com_begin                                     | 0           |
| Com_binlog                                    | 0           |
| Com_call_procedure                            | 0           |
| Com_change_db                                 | 1           |
| Com_change_master                             | 0           |
| Com_check                                     | 0           |
| Com_checksum                                  | 0           |
| Com_commit                                    | 0           |
| Com_create_db                                 | 0           |
| Com_create_event                              | 0           |
| Com_create_function                           | 0           |
| Com_create_index                              | 0           |
| Com_create_procedure                          | 0           |
| Com_create_server                             | 0           |
| Com_create_table                              | 2           |
| Com_create_trigger                            | 0           |
| Com_create_udf                                | 0           |
| Com_create_user                               | 0           |
| Com_create_view                               | 0           |
| Com_dealloc_sql                               | 0           |
| Com_delete                                    | 0           |
| Com_delete_multi                              | 0           |
| Com_do                                        | 0           |
| Com_drop_db                                   | 0           |
| Com_drop_event                                | 0           |
| Com_drop_function                             | 0           |
| Com_drop_index                                | 0           |
| Com_drop_procedure                            | 0           |
| Com_drop_server                               | 0           |
| Com_drop_table                                | 1           |
| Com_drop_trigger                              | 0           |
| Com_drop_user                                 | 0           |
| Com_drop_view                                 | 0           |
| Com_empty_query                               | 0           |
| Com_execute_sql                               | 0           |
| Com_flush                                     | 0           |
| Com_get_diagnostics                           | 0           |
| Com_grant                                     | 0           |
| Com_ha_close                                  | 0           |
| Com_ha_open                                   | 0           |
| Com_ha_read                                   | 0           |
| Com_help                                      | 0           |
| Com_insert                                    | 0           |
| Com_insert_select                             | 0           |
| Com_install_plugin                            | 0           |
| Com_kill                                      | 0           |
| Com_load                                      | 0           |
| Com_lock_tables                               | 0           |
| Com_optimize                                  | 0           |
| Com_preload_keys                              | 0           |
| Com_prepare_sql                               | 0           |
| Com_purge                                     | 0           |
| Com_purge_before_date                         | 0           |
| Com_release_savepoint                         | 0           |
| Com_rename_table                              | 0           |
| Com_rename_user                               | 0           |
| Com_repair                                    | 0           |
| Com_replace                                   | 0           |
| Com_replace_select                            | 0           |
| Com_reset                                     | 0           |
| Com_resignal                                  | 0           |
| Com_revoke                                    | 0           |
| Com_revoke_all                                | 0           |
| Com_rollback                                  | 0           |
| Com_rollback_to_savepoint                     | 0           |
| Com_savepoint                                 | 0           |
| Com_select                                    | 3           |
| Com_set_option                                | 0           |
| Com_signal                                    | 0           |
| Com_show_binlog_events                        | 0           |
| Com_show_binlogs                              | 0           |
| Com_show_charsets                             | 0           |
| Com_show_collations                           | 0           |
| Com_show_create_db                            | 0           |
| Com_show_create_event                         | 0           |
| Com_show_create_func                          | 0           |
| Com_show_create_proc                          | 0           |
| Com_show_create_table                         | 3           |
| Com_show_create_trigger                       | 0           |
| Com_show_databases                            | 2           |
| Com_show_engine_logs                          | 0           |
| Com_show_engine_mutex                         | 0           |
| Com_show_engine_status                        | 0           |
| Com_show_events                               | 0           |
| Com_show_errors                               | 0           |
| Com_show_fields                               | 0           |
| Com_show_function_code                        | 0           |
| Com_show_function_status                      | 0           |
| Com_show_grants                               | 0           |
| Com_show_keys                                 | 0           |
| Com_show_master_status                        | 0           |
| Com_show_open_tables                          | 0           |
| Com_show_plugins                              | 0           |
| Com_show_privileges                           | 0           |
| Com_show_procedure_code                       | 0           |
| Com_show_procedure_status                     | 0           |
| Com_show_processlist                          | 0           |
| Com_show_profile                              | 0           |
| Com_show_profiles                             | 0           |
| Com_show_relaylog_events                      | 0           |
| Com_show_slave_hosts                          | 0           |
| Com_show_slave_status                         | 0           |
| Com_show_status                               | 1           |
| Com_show_storage_engines                      | 0           |
| Com_show_table_status                         | 0           |
| Com_show_tables                               | 1           |
| Com_show_triggers                             | 0           |
| Com_show_variables                            | 0           |
| Com_show_warnings                             | 0           |
| Com_slave_start                               | 0           |
| Com_slave_stop                                | 0           |
| Com_stmt_close                                | 0           |
| Com_stmt_execute                              | 0           |
| Com_stmt_fetch                                | 0           |
| Com_stmt_prepare                              | 0           |
| Com_stmt_reprepare                            | 0           |
| Com_stmt_reset                                | 0           |
| Com_stmt_send_long_data                       | 0           |
| Com_truncate                                  | 0           |
| Com_uninstall_plugin                          | 0           |
| Com_unlock_tables                             | 0           |
| Com_update                                    | 0           |
| Com_update_multi                              | 0           |
| Com_xa_commit                                 | 0           |
| Com_xa_end                                    | 0           |
| Com_xa_prepare                                | 0           |
| Com_xa_recover                                | 0           |
| Com_xa_rollback                               | 0           |
| Com_xa_start                                  | 0           |
| Compression                                   | OFF         |
| Connection_errors_accept                      | 0           |
| Connection_errors_internal                    | 0           |
| Connection_errors_max_connections             | 0           |
| Connection_errors_peer_address                | 0           |
| Connection_errors_select                      | 0           |
| Connection_errors_tcpwrap                     | 0           |
| Connections                                   | 10          |
| Created_tmp_disk_tables                       | 0           |
| Created_tmp_files                             | 6           |
| Created_tmp_tables                            | 3           |
| Delayed_errors                                | 0           |
| Delayed_insert_threads                        | 0           |
| Delayed_writes                                | 0           |
| Flush_commands                                | 1           |
| Handler_commit                                | 0           |
| Handler_delete                                | 0           |
| Handler_discover                              | 0           |
| Handler_external_lock                         | 0           |
| Handler_mrr_init                              | 0           |
| Handler_prepare                               | 0           |
| Handler_read_first                            | 0           |
| Handler_read_key                              | 0           |
| Handler_read_last                             | 0           |
| Handler_read_next                             | 0           |
| Handler_read_prev                             | 0           |
| Handler_read_rnd                              | 0           |
| Handler_read_rnd_next                         | 15          |
| Handler_rollback                              | 0           |
| Handler_savepoint                             | 0           |
| Handler_savepoint_rollback                    | 0           |
| Handler_update                                | 0           |
| Handler_write                                 | 12          |
| Innodb_buffer_pool_dump_status                | not started |
| Innodb_buffer_pool_load_status                | not started |
| Innodb_buffer_pool_pages_data                 | 459         |
| Innodb_buffer_pool_bytes_data                 | 7520256     |
| Innodb_buffer_pool_pages_dirty                | 0           |
| Innodb_buffer_pool_bytes_dirty                | 0           |
| Innodb_buffer_pool_pages_flushed              | 50          |
| Innodb_buffer_pool_pages_free                 | 7729        |
| Innodb_buffer_pool_pages_misc                 | 3           |
| Innodb_buffer_pool_pages_total                | 8191        |
| Innodb_buffer_pool_read_ahead_rnd             | 0           |
| Innodb_buffer_pool_read_ahead                 | 0           |
| Innodb_buffer_pool_read_ahead_evicted         | 0           |
| Innodb_buffer_pool_read_requests              | 20091       |
| Innodb_buffer_pool_reads                      | 452         |
| Innodb_buffer_pool_wait_free                  | 0           |
| Innodb_buffer_pool_write_requests             | 155         |
| Innodb_data_fsyncs                            | 38          |
| Innodb_data_pending_fsyncs                    | 0           |
| Innodb_data_pending_reads                     | 0           |
| Innodb_data_pending_writes                    | 0           |
| Innodb_data_read                              | 7475200     |
| Innodb_data_reads                             | 468         |
| Innodb_data_writes                            | 76          |
| Innodb_data_written                           | 1656832     |
| Innodb_dblwr_pages_written                    | 50          |
| Innodb_dblwr_writes                           | 4           |
| Innodb_have_atomic_builtins                   | ON          |
| Innodb_log_waits                              | 0           |
| Innodb_log_write_requests                     | 21          |
| Innodb_log_writes                             | 11          |
| Innodb_os_log_fsyncs                          | 16          |
| Innodb_os_log_pending_fsyncs                  | 0           |
| Innodb_os_log_pending_writes                  | 0           |
| Innodb_os_log_written                         | 15872       |
| Innodb_page_size                              | 16384       |
| Innodb_pages_created                          | 8           |
| Innodb_pages_read                             | 451         |
| Innodb_pages_written                          | 50          |
| Innodb_row_lock_current_waits                 | 0           |
| Innodb_row_lock_time                          | 0           |
| Innodb_row_lock_time_avg                      | 0           |
| Innodb_row_lock_time_max                      | 0           |
| Innodb_row_lock_waits                         | 0           |
| Innodb_rows_deleted                           | 0           |
| Innodb_rows_inserted                          | 0           |
| Innodb_rows_read                              | 0           |
| Innodb_rows_updated                           | 0           |
| Innodb_num_open_files                         | 10          |
| Innodb_truncated_status_writes                | 0           |
| Innodb_available_undo_logs                    | 128         |
| Key_blocks_not_flushed                        | 0           |
| Key_blocks_unused                             | 6698        |
| Key_blocks_used                               | 0           |
| Key_read_requests                             | 0           |
| Key_reads                                     | 0           |
| Key_write_requests                            | 0           |
| Key_writes                                    | 0           |
| Last_query_cost                               | 0.000000    |
| Last_query_partial_plans                      | 0           |
| Max_used_connections                          | 2           |
| Not_flushed_delayed_rows                      | 0           |
| Open_files                                    | 46          |
| Open_streams                                  | 0           |
| Open_table_definitions                        | 81          |
| Open_tables                                   | 81          |
| Opened_files                                  | 170         |
| Opened_table_definitions                      | 4           |
| Opened_tables                                 | 2           |
| Performance_schema_accounts_lost              | 0           |
| Performance_schema_cond_classes_lost          | 0           |
| Performance_schema_cond_instances_lost        | 0           |
| Performance_schema_digest_lost                | 0           |
| Performance_schema_file_classes_lost          | 0           |
| Performance_schema_file_handles_lost          | 0           |
| Performance_schema_file_instances_lost        | 0           |
| Performance_schema_hosts_lost                 | 0           |
| Performance_schema_locker_lost                | 0           |
| Performance_schema_mutex_classes_lost         | 0           |
| Performance_schema_mutex_instances_lost       | 0           |
| Performance_schema_rwlock_classes_lost        | 0           |
| Performance_schema_rwlock_instances_lost      | 0           |
| Performance_schema_session_connect_attrs_lost | 0           |
| Performance_schema_socket_classes_lost        | 0           |
| Performance_schema_socket_instances_lost      | 0           |
| Performance_schema_stage_classes_lost         | 0           |
| Performance_schema_statement_classes_lost     | 0           |
| Performance_schema_table_handles_lost         | 0           |
| Performance_schema_table_instances_lost       | 0           |
| Performance_schema_thread_classes_lost        | 0           |
| Performance_schema_thread_instances_lost      | 0           |
| Performance_schema_users_lost                 | 0           |
| Prepared_stmt_count                           | 0           |
| Qcache_free_blocks                            | 1           |
| Qcache_free_memory                            | 1031352     |
| Qcache_hits                                   | 0           |
| Qcache_inserts                                | 0           |
| Qcache_lowmem_prunes                          | 0           |
| Qcache_not_cached                             | 17          |
| Qcache_queries_in_cache                       | 0           |
| Qcache_total_blocks                           | 1           |
| Queries                                       | 96          |
| Questions                                     | 15          |
| Select_full_join                              | 0           |
| Select_full_range_join                        | 0           |
| Select_range                                  | 0           |
| Select_range_check                            | 0           |
| Select_scan                                   | 3           |
| Slave_heartbeat_period                        |             |
| Slave_last_heartbeat                          |             |
| Slave_open_temp_tables                        | 0           |
| Slave_received_heartbeats                     |             |
| Slave_retried_transactions                    |             |
| Slave_running                                 | OFF         |
| Slow_launch_threads                           | 0           |
| Slow_queries                                  | 0           |
| Sort_merge_passes                             | 0           |
| Sort_range                                    | 0           |
| Sort_rows                                     | 0           |
| Sort_scan                                     | 0           |
| Ssl_accept_renegotiates                       | 0           |
| Ssl_accepts                                   | 0           |
| Ssl_callback_cache_hits                       | 0           |
| Ssl_cipher                                    |             |
| Ssl_cipher_list                               |             |
| Ssl_client_connects                           | 0           |
| Ssl_connect_renegotiates                      | 0           |
| Ssl_ctx_verify_depth                          | 0           |
| Ssl_ctx_verify_mode                           | 0           |
| Ssl_default_timeout                           | 0           |
| Ssl_finished_accepts                          | 0           |
| Ssl_finished_connects                         | 0           |
| Ssl_server_not_after                          |             |
| Ssl_server_not_before                         |             |
| Ssl_session_cache_hits                        | 0           |
| Ssl_session_cache_misses                      | 0           |
| Ssl_session_cache_mode                        | NONE        |
| Ssl_session_cache_overflows                   | 0           |
| Ssl_session_cache_size                        | 0           |
| Ssl_session_cache_timeouts                    | 0           |
| Ssl_sessions_reused                           | 0           |
| Ssl_used_session_cache_entries                | 0           |
| Ssl_verify_depth                              | 0           |
| Ssl_verify_mode                               | 0           |
| Ssl_version                                   |             |
| Table_locks_immediate                         | 70          |
| Table_locks_waited                            | 0           |
| Table_open_cache_hits                         | 0           |
| Table_open_cache_misses                       | 2           |
| Table_open_cache_overflows                    | 0           |
| Tc_log_max_pages_used                         | 0           |
| Tc_log_page_size                              | 0           |
| Tc_log_page_waits                             | 0           |
| Threads_cached                                | 0           |
| Threads_connected                             | 2           |
| Threads_created                               | 2           |
| Threads_running                               | 1           |
| Uptime                                        | 4320        |
| Uptime_since_flush_status                     | 4320        |
+-----------------------------------------------+-------------+
341 rows in set (0.01 sec)


mysql> show variables like 'slow%';
+---------------------+----------------------------------------------+
| Variable_name       | Value                                        |
+---------------------+----------------------------------------------+
| slow_launch_time    | 2                                            |
| slow_query_log      | OFF                                          |
| slow_query_log_file | /data/mysql/iZbp1e0xboek6oow616aoiZ-slow.log |
+---------------------+----------------------------------------------+
3 rows in set (0.00 sec)

mysql> show processlist;
+----+------+-----------+-------+---------+------+-------+------------------+
| Id | User | Host      | db    | Command | Time | State | Info             |
+----+------+-----------+-------+---------+------+-------+------------------+
|  6 | root | localhost | mysql | Sleep   | 3421 |       | NULL             |
|  9 | root | localhost | db1   | Query   |    0 | init  | show processlist |
+----+------+-----------+-------+---------+------+-------+------------------+
2 rows in set (0.00 sec)

mysql> show full processlist;
+----+------+-----------+-------+---------+------+-------+-----------------------+
| Id | User | Host      | db    | Command | Time | State | Info                  |
+----+------+-----------+-------+---------+------+-------+-----------------------+
|  6 | root | localhost | mysql | Sleep   | 3448 |       | NULL                  |
|  9 | root | localhost | db1   | Query   |    0 | init  | show full processlist |
+----+------+-----------+-------+---------+------+-------+-----------------------+
2 rows in set (0.00 sec)

扩展
mysql5.7 root密码更改 http://www.apelearn.com/bbs/thread-7289-1-1.html
myisam 和innodb引擎对比 http://www.pureweber.com/article/myisam-vs-innodb/
mysql 配置详解: http://blog.linuxeye.com/379.html
mysql调优: http://www.aminglinux.com/bbs/thread-5758-1-1.html
同学分享的亲身mysql调优经历: http://www.apelearn.com/bbs/thread-11281-1-1.html

文章来源于互联网:设置更改root密码、连接MySQL、MySQL常用命令

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