无法打开 /proc/net/unix：没有这样的文件或目录 //invoke-rc.d：无法确定当前运行级别

Question

我正在尝试在我的 wsl Ubuntu 18.04 上重新安装 mysql-server。

（我在 Windows 10 上有 MySQL 服务器，但在端口 3307 上。如果这很重要，但以防万一！）

我不能sudo service mysql start 也不能sudo /etc/init.d/mysql start 并且它返回了

No directory, logging in with HOME=/
mkdir: cannot create directory ‘//.cache’: Permission denied
-su: 19: /etc/profile.d/wsl-integration.sh: cannot create //.cache/wslu/integration: Directory nonexistent [Failed]

我搜索了有关在 Ubuntu 中重新安装 mysql 的信息，并按照以下步骤操作。
- https://github.com/microsoft/WSL/issues/1761

sudo su
apt-get remove --purge 'mysql*'
apt-get autoremove
apt-get autoclean
rm -f /etc/mysql /var/lib/mysql
apt-get install mysql-server

但在尝试 apt-get install mysql-server 时，我收到了以下错误。

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/5/fd/7: Operation not permitted
Cannot stat file /proc/5/fd/10: Operation not permitted
Cannot stat file /proc/5/fd/5: Operation not permitted
Cannot stat file /proc/843/fd/7: Operation not permitted
Cannot stat file /proc/843/fd/10: Operation not permitted
Cannot stat file /proc/843/fd/5: Operation not permitted
dpkg: error processing package mysql-server-5.7 (--configure):
 installed mysql-server-5.7 package post-installation script subprocess 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.

我一直在谷歌上搜索Cannot open /proc/net/unix: No such file or directory 和invoke-rc.d: could not determine current runlevel 问题，但找不到适合此问题的解决方案。

如果你能给我一些建议，我真的很感激。谢谢！

Answer 1

当我查看日志文件/var/log/mysql/error.log时，我发现

[ERROR] [MY-012585] [InnoDB] Linux Native AIO interface is not supported on this platform. Please check your OS documentation and install appropriate binary of InnoDB.

我通过创建一个新的配置文件 /etc/mysql/conf.d/no_native_aio.conf 禁用了 Native AIO：

[mysqld]
innodb_use_native_aio = 0 

然后我就可以像这样启动数据库服务器了：

sudo service mysql start

我也不得不跑

 sudo mysql_secure_installation

为root用户设置密码。

我不得不欺骗dpkg 相信安装后脚本已经运行 成功通过：

• 在/var/lib/dpkg/info/mysql-server-8.0.postinst 中添加exit 0 作为第二行
• 正在运行sudo dpkg --configure -a
• 从/var/lib/dpkg/info/mysql-server-8.0.postinst 中删除exit 0

Answer 2

这将是 WSL1 与 WSL2 的问题。 /proc 目录未完全填充 WSL1。检查您的版本运行（从 powershell）wsl -l -v。如果它没有给你任何版本信息，那么你在 WSL1 上。