mysqladmin是mysql官方提供的shell命令行工具，它的参数都需要在shell命令行里面执行，当我们使用mysqladmin的时候，必须指定两类参数，一类是连接参数，另外一类是命令参数，连接参数用来指定相应的连接信息，而命令参数用来指定命令信息，例如可以用来检查服务器的配置和当前状态、创建和删除数据库等。它的语法如下：
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mysqladmin [options] command [command-options] [command [command options]] ... |
除此之外，还有一些相关的参数配置(代码可以左滑哦~)：
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--bind-address=name 绑定远程访问主机的ip地址-i, --sleep=# 间隔多长时间执行一次。-c, --count=# 统计计数。与i选项配合使用。-f, --force 强制执行，删除数据库是无需确认信息，多条语句执行时忽略其中某条语句的错误。--default-character-set=name 设置默认字符集。-?, --help 显示帮助信息。-h, --host=name 指定连接主机。-u, --user=name 登录用户。-p, --password[=name] 登录密码，如果不写于参数后，则会提示输入。-p, --port=# 指定数据库端口。--protocol=name 使用的连接协议。（tcp，socket，pipe，memory）-r, --relative 显示前后两次输出的差异。必须与i选项配合使用。-s, --silent 静默退出。-s, --socket=name 指定socket文件。-v, --verbose 显示更多信息。-v, --version 显示版本信息。-w, --wait[=#] 如果连接断开，等待指定的时间后重试 |
这么多参数，想看着比较乱，那么我们来看看它具体能够帮我们做哪些事情吧：
1.查看服务器的状态：
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#每隔两秒查看一次服务器的状态[root@dev01 ~]# mysqladmin -uroot -p -i 2 -c 2 statusenter password: uptime: 42767 threads: 2 questions: 533 slow queries: 0 opens: 346 flush tables: open tables: queries per second avg: 0.012uptime: threads: questions: slow queries: opens: flush tables: open tables: queries per second avg: 0.012 |
2.修改root密码：
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#修改root密码mysqladmin -u root -p原密码 password 'newpassword' |
3.检查mysqlserver是否可用
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#查询服务是否正常[root@dev01 ~]# mysqladmin -uroot -p pingenter password: mysqld is alive |
4.查询服务器的版本
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[root@dev01 ~]# mysqladmin -uroot -p versionenter password: mysqladmin ver 8.42 distrib 5.7.19, for linux-glibc2.12 on x86_64copyright (c) 2000, 2017, oracle and/or its affiliates. all rights reserved.oracle is a registered trademark of oracle corporation and/or itsaffiliates. other names may be trademarks of their respectiveowners.server version 5.7.19protocol version 10connection localhost via unix socketunix socket /tmp/mysql.sockuptime: 12 hours 42 secthreads: 2 questions: 538 slow queries: 0 opens: 346 flush tables: 1 open tables: 285 queries per second avg: 0.012 |
5.查看系统当前的状态值 （省略其中的部分结果）
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[root@dev01 ~]# mysqladmin -uroot -p extended-statusenter password: +-----------------------------------------------+----------+| variable_name | value |+-----------------------------------------------+----------+| aborted_clients | || aborted_connects | || innodb_num_open_files | || innodb_truncated_status_writes | | | uptime | || uptime_since_flush_status | |+-----------------------------------------------+----------+ |
6.查看服务器系统变量值
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[root@dev01 ~]# mysqladmin -uroot -p variablesenter password: ......| key_cache_block_size | || key_cache_division_limit | || large_files_support | on || large_page_size | || large_pages | off || lc_messages | en_us || lc_messages_dir | /usr/local/mysql/share/ |...... |
7.查看当前所有的进程
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[root@dev01 ~]# mysqladmin -uroot -p processlistenter password: +----+------+----------------------+----------+---------+-------+----------+------------------+| id | user | host | db | command | time | state | info |+----+------+----------------------+----------+---------+-------+----------+------------------+| | root | 192.168.56.102: | devopsdb | sleep | | | || | root | localhost | | query | | starting | show processlist |+----+------+----------------------+----------+---------+-------+----------+------------------+ |
8.创建数据库
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[root@dev01 ~]# mysqladmin -uroot -p create db_testenter password: [root@dev01 ~]# mysql -uroot -penter password: mysql: [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 isserver version: 5.7.19 mysql community server (gpl)copyright (c) 2000, 2017, oracle and/or its affiliates. all rights reserved.oracle is a registered trademark of oracle corporation and/or itsaffiliates. other names may be trademarks of their respectiveowners.type 'help;' or '\h' for help. type '\c' to clear the current input statement.mysql> show databases;+--------------------+| database |+--------------------+| information_schema || tkgrowdb_dbo || tkgrowlog_dbo || cydevopsdb || db_test || yeyz |+--------------------+ rows in set (0.00 sec)mysql> exitbye |
从上面的命令我们可以看到，我们已经通过create命令创建了数据库db_test
9.删除特定的数据库：
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[root@dev01 ~]# mysqladmin -uroot -p drop db_testenter 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 'db_test' database [y/n] ydatabase "db_test" dropped[root@dev01 ~]# mysql -uroot -penter password: welcome to the mysql monitor. commands end with ; or \g.your mysql connection id isserver version: 5.7.19 mysql community server (gpl)copyright (c) 2000, 2017, oracle and/or its affiliates. all rights reserved.oracle is a registered trademark of oracle corporation and/or itsaffiliates. other names may be trademarks of their respectiveowners.type 'help;' or '\h' for help. type '\c' to clear the current input statement.mysql> show databases;+--------------------+| database |+--------------------+| information_schema || tkgrowdb_dbo || tkgrowlog_dbo || cydevopsdb || yeyz |+--------------------+ rows in set (0.00 sec) |
在我们日常操作中，drop操作应该谨慎一些，可以看到，mysql也友好的给出了提醒。
10.重载权限表和刷新缓存（无明显输出）
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[root@dev01 ~]# mysqladmin -uroot -p reloadenter password:[root@dev01 ~]# mysqladmin -uroot -p refreshenter password: |
11.启用安全模式关闭数据库
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[root@dev01 ~]# ps -ef|grep mysqldroot : ? :: /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql --pid-file=/data/mysql/dev01.pidmysql : ? :: /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/mysqld.log --pid-file=/data/mysql/dev01.pid --socket=/tmp/mysql.sockroot : pts/ :: grep mysqld[root@dev01 ~]# mysqladmin -uroot -p shutdownenter password: [root@dev01 ~]# ps -ef|grep mysqldroot : pts/ :: grep mysqld |
12.各种刷新命令
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[root@dev01 ~]# mysqladmin -u root -ptmppassword flush-hosts[root@dev01 ~]# mysqladmin -u root -ptmppassword flush-logs[root@dev01 ~]# mysqladmin -u root -ptmppassword flush-privileges[root@dev01 ~]# mysqladmin -u root -ptmppassword flush-status[root@dev01 ~]# mysqladmin -u root -ptmppassword flush-tables[root@dev01 ~]# mysqladmin -u root -ptmppassword flush-threads |
13.停止和启动mysql从节点复制过程
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[root@dev01 ~]# mysqladmin -u root -p stop-slave[root@dev01 ~]# mysqladmin -u root -p start-slave |
以上就是mysqladmin最常用的一些功能，标注为红色的一般在工作中应用的范围及其广泛，可以多留意下。
以上就是mysql mysqladmin客户端的使用简介的详细内容，更多关于mysql mysqladmin客户端的资料请关注服务器之家其它相关文章！
原文链接：https://cloud.tencent.com/developer/article/1533616
