mysqld.log中没有临时密码

Question

我使用了mysql 5.7.16社区和centos 7。

我正在关注视频tutorial安装mysql：

1. wget http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
2. yum localinstall dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
3. yum repolist enabled | grep＆＃34; mysql。 -community。＆＃34;
4. yum install mysql-community-server
5. service mysqld start

启动mysql后，我可以看到状态为service mysqld status的活动（正在运行）。

但我可以＆＃39;得到任何东西：grep 'temporary password' /var/log/mysqld.log

msyqld.log（忽略普通日志）：

[Warning] InnoDB: Cannot open table mysql/plugin from the internal data dictionary of InnoDB though the .frm file for the table exists.
mysqld: Table 'mysql.plugin' doesn't exist

[ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

[Warning] InnoDB: Cannot open table mysql/gtid_executed from the internal data dictionary of InnoDB though the .frm file for the table exists.
mysqld: Table 'mysql.gtid_executed' doesn't exist

[Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.

[Warning] InnoDB: Cannot open table mysql/server_cost from the internal data dictionary of InnoDB though the .frm file for the table exists.

[Warning] Failed to open optimizer cost constant tables

[Warning] InnoDB: Cannot open table mysql/time_zone_leap_second from the internal data dictionary of InnoDB though the .frm file for the table exists.

[Warning] Can't open and lock time zone table: Table 'mysql.time_zone_leap_second' doesn't exist trying to live without them

[Warning] InnoDB: Cannot open table mysql/servers from the internal data dictionary of InnoDB though the .frm file for the table exists.

[ERROR] Can't open and lock privilege tables: Table 'mysql.servers' doesn't exist

感谢任何帮助！

Answer 1

我想出来了。

1. 我安装了选择了mysql的centos 7，mysql版本是5.5。
2. 删除它：yum remove mysql-serverl。
3. 本教程安装5.7.16。
4. 有这些错误。
5. Yum删除mysql-community-server，再次安装5.7。
6. 仍有这些错误。
7. Yum删除mysql-community-server，但删除dir / var / lib / mysql。
8. 然后重新安装，它可以正常工作。

关键是需要手动删除/ var / lib / mysql。

Answer 2

如果没有密码，请不要担心。 做吧。

sudo mysql_secure_installation

如果没有密码，请按Enter。

Answer 3

我只是重新启动mysql并搜索：

service mysqld start

grep 'temporary password' /var/log/mysqld.log

显示了默认密码。