在Bash里使用交互式命令连接MySQL数据库，并执行一次查询

首先，我们是使用一台Linux终端来连接远程服务器上的MySql数据库，所以操作系统上需要安装客户端。

# yum install mysql

注意，书写安装的是MySQL, 可实际安装的确是MariaDB, 这后面的故事可以看看参考资料里的知乎里的一篇文章。

之后，使用命令来连接数据库。

# mysql -h 10.XXX.XXX.150 -u root -D performance_data -p

连上数据库之后，就可以在mysql shell里运行命令了。

MySQL [performance_data]> show tables;

MySQL [performance_data]> select id, automation_label, description from hardware where automation_label = 'f8101';

注意，MySQL的命令之后需要输入分号，单纯的换行是不能触发命令的执行的。

参考资料

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YUM COMMAND CHEAT SHEET

https://access.redhat.com/sites/default/files/attachments/rh_yum_cheatsheet_1214_jcs_print-1.pdf

Yum Command Fails with “Another app is currently holding the yum lock” in CentOS/ RHEL 7

https://www.thegeekdiary.com/yum-command-fails-with-another-app-is-currently-holding-the-yum-lock-in-centos-rhel-7/

How to execute MySQL queries from command line/Bash shell ?

https://hoststud.com/resources/how-to-execute-mysql-queries-from-command-line-bash-shell.136/

How to Run MySQL/MariaDB Queries Directly from the Linux Command Line

https://www.tecmint.com/run-execute-mysql-mariadb-queries-directly-linux-commandline/

MySQL CLI Cheatsheet

https://gist.github.com/hofmannsven/9164408

CentOS 7为什么放弃了MySQL，而改使用MariaDB？

https://www.zhihu.com/question/41832866