RaspberryPi（树莓派）如何安装 MariaDB / MySQL 数据库

执行上面 SQL 的意图是，创建一个用户，为用户赋权。

修改配置允许远程访问

如果你现在进行远程连接  MariaDB / MySQL 的时候，你会收到连接 10061 的错误。

按照我们前面的提示，这是因为绑定的问题。

旧版本的MySQL修改/etc/mysql/my.cnf文件，修改内容相同。

如果你的服务上的版本没有这个文件的话，新版本的服务器，你需要修改：

/etc/mysql/mariadb.conf.d/50-server.cnf 这个文件。

注释掉 ’bind-address

必要的话，可以尝试重启服务器。

重启服务器的命令是：

root@raspberrypi:~# service mariadb restart

查看数据库服务器进程是是否运行的命令是：

service mariadb status

如果服务器输出下面的信息，表示服务器已经运行了，你可以尝试使用 Client 远程进行连接了。

root@raspberrypi:~# service mariadb status
● mariadb.service - MariaDB 10.3.22 database server
   Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2020-04-05 10:57:14 EDT; 11s ago
     Docs: man:mysqld(8)
           https://mariadb.com/kb/en/library/systemd/
  Process: 1691 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (code=exited, status=0/SUCCESS)
  Process: 1692 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)
  Process: 1694 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= ||   VAR=`/usr/bin/galera_recovery`; [ $? -eq 0 ]   && systemctl set-environment _WSREP_START_POSITION=$VAR || exit 1 (code=exited, status=0/SUCCESS
  Process: 1771 ExecStartPost=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)
  Process: 1773 ExecStartPost=/etc/mysql/debian-start (code=exited, status=0/SUCCESS)
 Main PID: 1740 (mysqld)
   Status: "Taking your SQL requests now..."
    Tasks: 31 (limit: 4035)
   Memory: 47.7M
   CGroup: /system.slice/mariadb.service
           └─1740 /usr/sbin/mysqld

Apr 05 10:57:13 raspberrypi systemd[1]: Starting MariaDB 10.3.22 database server...
Apr 05 10:57:14 raspberrypi mysqld[1740]: 2020-04-05 10:57:14 0 [Note] /usr/sbin/mysqld (mysqld 10.3.22-MariaDB-0+deb10u1) starting as process 1740 ...
Apr 05 10:57:14 raspberrypi systemd[1]: Started MariaDB 10.3.22 database server.
Apr 05 10:57:14 raspberrypi /etc/mysql/debian-start[1775]: Upgrading MySQL tables if necessary.
Apr 05 10:57:14 raspberrypi /etc/mysql/debian-start[1778]: /usr/bin/mysql_upgrade: the ‘--basedir‘ option is always ignored
Apr 05 10:57:14 raspberrypi /etc/mysql/debian-start[1778]: Looking for ‘mysql‘ as: /usr/bin/mysql
Apr 05 10:57:14 raspberrypi /etc/mysql/debian-start[1778]: Looking for ‘mysqlcheck‘ as: /usr/bin/mysqlcheck
Apr 05 10:57:14 raspberrypi /etc/mysql/debian-start[1778]: This installation of MySQL is already upgraded to 10.3.22-MariaDB, use --force if you still need to run mysql_upgrade
Apr 05 10:57:14 raspberrypi /etc/mysql/debian-start[1786]: Checking for insecure root accounts.
Apr 05 10:57:14 raspberrypi /etc/mysql/debian-start[1790]: Triggering myisam-recover for all MyISAM tables and aria-recover for all Aria tables

另外，你可以查看 MariaDB 运行的端口：

MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE ‘port‘;
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.004 sec)

MariaDB [(none)]>

https://www.cwiki.us/questions/57938848

RaspberryPi（树莓派）如何安装 MariaDB / MySQL 数据库

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