无法在纯 ubuntu 20.04 上安装 mysql

Question

我刚刚安装了 WSL Ubuntu 20.04，我做的第一件事就是

 sudo apt-get update
 sudo apt-get upgrade
 sudo apt-get install mysql-server

它给了我什么

Setting up mysql-server-8.0 (8.0.20-0ubuntu0.20.04.1) ...
invoke-rc.d: could not determine current runlevel
 * Stopping MySQL database server mysqld                                                                                                                         [ OK ]
update-alternatives: using /etc/mysql/mysql.cnf to provide /etc/mysql/my.cnf (my.cnf) in auto mode
Renaming removed key_buffer and myisam-recover options (if present)
Cannot open /proc/net/unix: No such file or directory
Cannot stat file /proc/1/fd/5: Operation not permitted
Cannot stat file /proc/1/fd/10: Operation not permitted
Cannot stat file /proc/1/fd/6: Operation not permitted
Cannot stat file /proc/42/fd/7: Operation not permitted
Cannot stat file /proc/42/fd/10: Operation not permitted
Cannot stat file /proc/42/fd/5: Operation not permitted
mysqld will log errors to /var/log/mysql/error.log
mysqld is running as pid 3726
sleep: cannot read realtime clock: Invalid argument
dpkg: error processing package mysql-server-8.0 (--configure):
 installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1

和

dpkg：依赖问题阻止了 mysql-server 的配置：

 mysql-server depends on mysql-server-8.0; however:
  Package mysql-server-8.0 is not configured yet.

    dpkg: error processing package mysql-server (--configure):
     dependency problems - leaving unconfigured
    Setting up libcgi-pm-perl (4.46-1) ...
    No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                              Setting up libhtml-template-perl (2.97-1) ...
    Setting up libcgi-fast-perl (1:2.15-1) ...
    Processing triggers for systemd (245.4-4ubuntu3.1) ...
    Processing triggers for man-db (2.9.1-1) ...
    Processing triggers for libc-bin (2.31-0ubuntu9) ...
    Errors were encountered while processing:
     mysql-server-8.0
     mysql-server
    E: Sub-process /usr/bin/dpkg returned an error code (1)

然后我试过了 sudo mysql_secure_installation

Error: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

这不仅在 WSL 上。

Answer 1

我和你有同样的问题；Ubuntu 20.04 WSL我在Windows 10中使用了以下版本，它对我有帮助。首先，由于dependency problems - leaving unconfigured错误，我按照这里的答案清除MySQL并尝试重新安装：

sudo apt-get purge mysql*
sudo apt-get autoremove
sudo apt-get autoclean
sudo apt-get dist-upgrade

sudo apt-get install mysql-server

完成此操作后，问题仍然存在（但无论如何这肯定是有帮助的）。

下一个线索是Can't connect to local MySQL server through socket错误... MySQL命令要求输入密码并提供错误的密码会导致此错误。密码还没设置吧？错误的！阅读MySQL 8.0 参考手册 - 默认权限安装最初会设置一个随机密码。所以必须先更改root密码。

为此，我遵循了这个答案。为了方便起见，我将答案复制在这里：

在 ubuntu 上我做了以下操作：

sudo service mysql stop
sudo mysqld_safe --skip-grant-tables --skip-syslog --skip-networking

然后在新终端中运行 mysql：

mysql -u root

并运行以下查询来更改密码：

UPDATE mysql.user SET authentication_string=PASSWORD('password') WHERE User='root';
FLUSH PRIVILEGES;

在 MySQL 5.7 中，mysql.user 表字段中的密码字段被删除，现在字段名称为“authentication_string”。

引用答案后，请注意该PASSWORD()函数已被弃用，如在此答案中共享的那样。正如那里所述，只需使用我使用过的任何MySQL 加密函数MD5()替换它即可。

最后：

sudo service mysql start
* Starting MySQL database server mysqld                     [ OK ]