小编Man*_*dan的帖子

我安装了一些 Ubuntu Server 20.04，但仅其中之一会发生以下情况：

sudo apt update
... password
Hit:1 http://repo.mysql.com/apt/ubuntu groovy InRelease
Ign:2 http://pe.archive.ubuntu.com/ubuntu groovy InRelease
Ign:3 http://pe.archive.ubuntu.com/ubuntu groovy-updates InRelease
Hit:4 http://apt.postgresql.org/pub/repos/apt groovy-pgdg InRelease
Ign:5 http://pe.archive.ubuntu.com/ubuntu groovy-backports InRelease
Ign:6 http://pe.archive.ubuntu.com/ubuntu groovy-security InRelease
Err:7 http://pe.archive.ubuntu.com/ubuntu groovy Release
  404  Not Found [IP: 200.236.31.4 80]
Err:8 http://pe.archive.ubuntu.com/ubuntu groovy-updates Release
  404  Not Found [IP: 200.236.31.4 80]
Err:9 http://pe.archive.ubuntu.com/ubuntu groovy-backports Release
  404  Not Found [IP: 200.236.31.4 80]
Err:10 http://pe.archive.ubuntu.com/ubuntu groovy-security Release
  404  Not Found [IP: 200.236.31.4 80]
Reading package lists... Done
E: The repository …

通过 VirtualBox，即使在不同的机器上，我也有 2 个 Ubuntu Server 20.04 实例运行，并具有以下信息：

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.3 LTS
Release:        20.04
Codename:       focal

两者都安装了 MySQL，其说明与我几个月前使用的说明相同。当我这样做时，突然间，对于其中一个人来说，sudo apt update出现以下内容：

Get:2 http://repo.mysql.com/apt/ubuntu focal InRelease [12.9 kB]
Hit:3 http://pe.archive.ubuntu.com/ubuntu focal InRelease
Ign:4 https://packages.erlang-solutions.com/ubuntu focal InRelease
Hit:5 https://packages.erlang-solutions.com/ubuntu focal Release
Get:6 http://pe.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Err:2 http://repo.mysql.com/apt/ubuntu focal InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
Get:9 http://pe.archive.ubuntu.com/ubuntu focal-backports InRelease [108 …

在通过 VirtualBox 将 Ubuntu Desktop 20.04 升级到 22.04 后，focal目录jammy中/etc/apt/sources.list.d存在该mysql.list文件。

根据一项研究，建议打开该文件并将其从 更改local为jammy. 因此我现在有

### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out entries below, but any other modifications may be lost.
# Use command 'dpkg-reconfigure mysql-apt-config' as root for modifications.
deb http://repo.mysql.com/apt/ubuntu/ jammy mysql-apt-config
deb http://repo.mysql.com/apt/ubuntu/ jammy mysql-8.0
deb http://repo.mysql.com/apt/ubuntu/ jammy mysql-tools
#deb http://repo.mysql.com/apt/ubuntu/ jammy mysql-tools-preview
deb-src http://repo.mysql.com/apt/ubuntu/ jammy mysql-8.0
manueljordan@mac2013-vb143:/etc/apt/sources.list.d$ 

现在，当执行该sudo apt update命令时，会发生以下情况： …

This is closely related to this question: How can I tell Ubuntu to do nothing when I close my laptop lid?.

I would like to stop Ubuntu from suspending or sleeping when the laptop lid is closed, while still turning the screen off to save power. How can I do that?

This is for a Dell Precision 5550 running Ubuntu 20.04 preinstalled.

VirtualBox 在6.1.38之前的许多主机中，对于许多虚拟机：Ubuntu 桌面/服务器已完成从 20.04 到 22.04 的升级。该过程很成功。

现在，对于所有桌面环境（不确定服务器是否会发生），当 Ubuntu 加载时会出现以下消息：

RETBleed: WARNING: Spectre v2 mitigation leaves CPU vulnerable to RETBleed attacks, data leaks possible!

此消息仅出现在该22.04版本中 - 因此从未18.04出现在以前的版本中，例如20.04

我关心的是：

• 这是关于 Ubuntu 本身安全性的直接错误吗？- 或者
• 是 VirtualBox 引起的“某些东西”吗？

如何解决这种情况？

请注意，我可以通过所有这些虚拟机平静地工作。

我了解交互式登录和交互式非登录之间的区别

+----------------+-----------+-----------+------+\n|                |Interactive|Interactive|Script|\n|                |login      |non-login  |      |\n+----------------+-----------+-----------+------+\n|/etc/profile    |   A       |           |      |\n+----------------+-----------+-----------+------+\n|/etc/bash.bashrc|           |    A      |      |\n+----------------+-----------+-----------+------+\n|~/.bashrc       |           |    B      |      |\n+----------------+-----------+-----------+------+\n|~/.bash_profile |   B1      |           |      |\n+----------------+-----------+-----------+------+\n|~/.bash_login   |   B2      |           |      |\n+----------------+-----------+-----------+------+\n|~/.profile      |   B3      |           |      |\n+----------------+-----------+-----------+------+\n|BASH_ENV        |           |           |  A   |\n+----------------+-----------+-----------+------+\n|                |           |           |      |\n+----------------+-----------+-----------+------+\n|                |           |           |      |\n+----------------+-----------+-----------+------+\n|~/.bash_logout  |    C      |           |      |\n+----------------+-----------+-----------+------+\n