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So i tried to update my package and here its says that

Err:9 https://download.docker.com/linux/debian hirsute Release 404  Not Found [IP: 108.158.251.124 443]

so what does this problem exactly mean and how to solve this? and i am newbie in linux so please tell me what does this "doesn't have release file mean"?"s 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. " and and what does this mean too?

Artur Meinild
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hush345
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  • Ubuntu 21.04 (along with all flavors) is End-of-Life and thus unsupported on this site (https://askubuntu.com/help/on-topic), and many other Ubuntu sites, unless your question is specific to moving to a supported release of Ubuntu. https://fridge.ubuntu.com/2022/01/21/ubuntu-21-04-hirsute-hippo-end-of-life-reached-on-january-20-2022/ https://help.ubuntu.com/community/EOLUpgrades – guiverc Feb 24 '22 at 21:26
  • That source provides support for Debian releases only if you look, open the link up with a browser & peek in the dists/ folder for supported releases. You'll quickly note no Ubuntu support is provided there, but I hope your box is offline given some patches for hirsute were dropped as it reached EOL prior to their time required to be in -proposed was completed; users having got their patches post-upgrade to 21.10 or impish. – guiverc Feb 24 '22 at 21:33

1 Answers1

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First, you should upgrade to Ubuntu 21.10, since 21.04 is out of support.

Then, your repo string is wrong. The Docker repo for Ubuntu Impish should be: (after you upgrade to a supported release)

deb https://download.docker.com/linux/ubuntu impish stable

So you should edit your sources.list to have the correct string. The source file will most likely be either /etc/apt/sources.list or /etc/apt/sources.list.d/docker.list.

See instructions here.

Artur Meinild
  • 26,018