无法安装或删除 MySQL

Question

所以今天我安装了 MariaDB，所以我可以通过 phpmyadmin 登录，显然它不起作用所以我删除了它，再试了四次，但我失败了。决定改用 MySQL 服务器。删除 MariaDB 后我无法安装它。

这是我正在尝试做的事情和输出：

shavit@dedi:~$ sudo apt-get install mysql-server
[sudo] password for shavit:
Reading package lists... Done
Building dependency tree
Reading state information... Done
mysql-server is already the newest version (5.7.12-0ubuntu1).
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up mysql-server-5.7 (5.7.12-0ubuntu1) ...
mysql_upgrade: Got error: 1524: Plugin 'unix_socket' is not loaded while connect                                                                                                                                                             ing to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates it's a follow-up er                                                                                                                                                             ror from a previous failure.
                            Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

shavit@dedi:~$ sudo apt-get remove mysql-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libaio1 mysql-client-5.7 mysql-client-core-5.7 mysql-common mysql-server-5.7
  mysql-server-core-5.7
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED
  mysql-server
0 to upgrade, 0 to newly install, 1 to remove and 0 not to upgrade.
2 not fully installed or removed.
After this operation, 159 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 35749 files and directories currently installed.)
Removing mysql-server (5.7.12-0ubuntu1) ...
Setting up mysql-server-5.7 (5.7.12-0ubuntu1) ...
mysql_upgrade: Got error: 1524: Plugin 'unix_socket' is not loaded while connecting to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 mysql-server-5.7
E: Sub-process /usr/bin/dpkg returned an error code (1)

我现在真的迷路了..谷歌搜索告诉我我应该跑步，apt-get install -f但这就是我得到的：

shavit@dedi:~$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up mysql-server-5.7 (5.7.12-0ubuntu1) ...
mysql_upgrade: Got error: 1524: Plugin 'unix_socket' is not loaded while connecting to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
No apport report written because the error message indicates it's a follow-up error from a previous failure.
                                                                                                            dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

所以我运行sudo apt-get autoremove并继续安装：

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.23-0ubuntu3) ...
No apport report written because the error message indicates it's a follow-up error from a previous failure.
                            Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

我是与 Linux 尤其是 Ubuntu 相关的任何东西的新手。有人可以伸出手帮助我吗？非常感激！

Answer 1

我认为您安装了 MariaDB 的事实导致了这个问题。MariaDB 设置的配置与 vanilla MySQL 并不完全一致。如果您要清除所有旧配置并从头开始设置所有内容，它应该可以工作。请注意，这将删除您当前的数据库！备份任何重要数据。

尝试运行以下命令来重置和清除所有与 MySQL 相关的内容：

sudo apt purge mysql-client-5.7 mysql-client-core-5.7 mysql-common mysql-server-5.7 mysql-server-core-5.7 mysql-server

完成此操作后，运行以下命令以更新您的系统并“清理”您的包缓存。

sudo apt update && sudo apt dist-upgrade && sudo apt autoremove && sudo apt -f install

然后，尝试重新安装 MySQL 服务器：

sudo apt install mysql-server

Answer 2

mariadb-server之前安装时可能会发生此错误mysql-server。要解决此错误，您必须在尝试再次安装 MySQL 之前删除目录/var/lib/mysql*并/etc/mysql*删除所有配置和依赖项文件。

sudo apt purge mysql-client-5.7 mysql-client-core-5.7 mysql-common mysql-server-5.7 mysql-server-core-5.7 mysql-server
sudo apt update && sudo apt dist-upgrade && sudo apt autoremove && sudo apt -f install
sudo apt install mysql-server