请原谅，但我对 Ubuntu 故障排除还是个新手，这确实是我第一次尝试升级。
当我运行“sudo apt update”时，我遇到了许多错误，具体来说是在一长串的 Hit 和 Get 结果中出现的以下错误：
Err:2 https://cli.github.com/packages stable InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059
-- 有没有可以运行来修复此问题的命令？ 如果有，它是什么？
Err:11 http://security.ubuntu.com/ubuntu impish-security Release
404 Not Found [IP: 91.189.91.38 80]
--我该如何解决这些 404 错误？有地方可以找到实时 IP 吗？
Err:11 http://security.ubuntu.com/ubuntu impish-security Release
404 Not Found [IP: 91.189.91.38 80]
Err:13 https://content.runescape.com/downloads/ubuntu trusty InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7373B12CE03BEB4B
--我已卸载它，所以我不知道如何追踪它！
Err:20 https://ppa.launchpadcontent.net/gabor-karsay/parlatype/ubuntu jammy Release
404 Not Found [IP: 185.125.190.52 443]
然后有这个块：
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://cli.github.com/packages stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059
W: Target Sources (restricted/source/Sources) is configured multiple times in /etc/apt/sources.list:2 and /etc/apt/sources.list:7
E: The repository 'http://security.ubuntu.com/ubuntu impish-security Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://content.runescape.com/downloads/ubuntu trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7373B12CE03BEB4B
E: The repository 'https://ppa.launchpadcontent.net/gabor-karsay/parlatype/ubuntu jammy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: Target Sources (restricted/source/Sources) is configured multiple times in /etc/apt/sources.list:2 and /etc/apt/sources.list:7
我该如何解决这个问题？我该从哪里开始呢？我不怕终端，但我害怕不小心毁掉我的机器！有人能帮我把它分解成一系列小块，或者给我一些资源，让我更好地理解我正在看的东西吗？我刚刚找到了 man pages 网站，但还不明白如何浏览它来找到我需要的东西！我想如果我能解决上述大多数（如果不是全部）错误，我就可以解决升级错误。它挂在第二步，指向我“网络错误”。
尝试过：浏览 Stack Exchange、Stack Overflow 和几个 Ubuntu 教程网站，偶然发现了手册页的在线副本（我还没有弄清楚如何使用终端来获取它们并导航到那里），关闭 Live Updater，更改设置，将服务器从特定服务器更改为通用（我认为）服务器。
我真的很想升级，任何帮助或资源都非常棒。如果我能澄清任何事情，请告诉我，我会尽力而为！