I am using this command to try to download qBittorrent
sudo add-apt-repository ppa:qbittorrent-team/qbittorrent-stable
However, I am getting this error:
Hit:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu focal InRelease
Get:3 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:4 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Get:5 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages [1,031 kB]
Get:6 http://us.archive.ubuntu.com/ubuntu focal-updates/main i386 Packages [490 kB]
Get:7 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 DEP-11 Metadata [283 kB]
Get:8 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages [781 kB]
Get:9 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 DEP-11 Metadata [330 kB]
Get:10 http://us.archive.ubuntu.com/ubuntu focal-updates/universe DEP-11 48x48 Icons [205 kB]
Get:11 http://us.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 DEP-11 Metadata [2,468 B]
Get:12 http://us.archive.ubuntu.com/ubuntu focal-backports/universe amd64 DEP-11 Metadata [1,768 B]
Hit:13 https://packagecloud.io/slacktechnologies/slack/debian jessie InRelease
Get:14 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Ign:15 https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 InRelease
Get:16 https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 Release [5,378 B]
Get:17 https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 Release.gpg [801 B]
Get:18 https://brave-browser-apt-release.s3.brave.com stable InRelease [4,317 B]
Get:19 https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4/multiverse arm64 Packages [9,065 B]
Hit:20 http://ppa.launchpad.net/apandada1/brightness-controller/ubuntu focal InRelease
Get:21 https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4/multiverse amd64 Packages [12.2 kB]
Get:22 https://brave-browser-apt-release.s3.brave.com stable/main amd64 Packages [4,887 B]
Get:23 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages [704 kB]
Ign:24 http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu focal InRelease
Get:25 http://security.ubuntu.com/ubuntu focal-security/main Translation-en [141 kB]
Get:26 http://security.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [24.5 kB]
Get:27 http://security.ubuntu.com/ubuntu focal-security/restricted amd64 Packages [251 kB]
Get:28 http://security.ubuntu.com/ubuntu focal-security/restricted Translation-en [36.5 kB]
Get:29 http://security.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [58.3 kB]
Get:30 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 DEP-11 Metadata [2,464 B]
Get:31 http://ppa.launchpad.net/ethereum/ethereum/ubuntu focal InRelease [17.5 kB]
Hit:32 http://ppa.launchpad.net/obsproject/obs-studio/ubuntu focal InRelease
Hit:33 http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu focal InRelease
Hit:34 http://ppa.launchpad.net/wireshark-dev/stable/ubuntu focal InRelease
Err:35 http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu focal Release
404 Not Found [IP: 91.189.95.85 80]
Get:36 http://ppa.launchpad.net/ethereum/ethereum/ubuntu focal/main amd64 Packages [2,808 B]
Hit:37 https://repo.windscribe.com/ubuntu bionic InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu focal 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.
Why does the "bitcoin" repository cause an error for bittorrent, which is something totally different? Obviously, there is something I don't understand here about packages/repositories, but why does this request for many other applications (ubuntu, mongodb, ethereum, etc.)?
