我今天必须白白更新我的VPS服务器，但是其中存在这些404错误。我该如何摆脱它们？
因为否则我没有安装SinusBot
Err:9 http://ppa.launchpad.net/ondrej/php/ubuntu focal/main amd64 Packages
404 Not Found
Ign:10 http://ppa.launchpad.net/ondrej/php/ubuntu focal/main all Packages
Ign:13 http://ppa.launchpad.net/ondrej/php/ubuntu focal/main Translation-en_US
Ign:15 http://ppa.launchpad.net/ondrej/php/ubuntu focal/main Translation-en
Ign:16 http://ppa.launchpad.net/texlive-backports/ppa/ubuntu focal/main all Pack ages
Err:17 http://ppa.launchpad.net/texlive-backports/ppa/ubuntu focal/main amd64 Pa ckages
404 Not Found
Ign:18 http://ppa.launchpad.net/texlive-backports/ppa/ubuntu focal/main Translat ion-en_US
Ign:19 http://ppa.launchpad.net/texlive-backports/ppa/ubuntu focal/main Translat ion-en
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/ondrej/php/ubuntu focal Release' doe s not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potential ly dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration deta ils.
W: The repository 'http://ppa.launchpad.net/texlive-backports/ppa/ubuntu focal R elease' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potential ly dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration deta ils.
E: Failed to fetch http://ppa.launchpad.net/ondrej/php/ubuntu/dists/focal/main/b inary-amd64/Packages 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/texlive-backports/ppa/ubuntu/dists/f ocal/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
PPA ondrey PHP和texlive不支持focus dist。
尝试在/etc/apt/sources.list.d/ondrej-ubuntu-php-focal.list（或类似的东西）中将焦距从eoan更改为eoan。
与texlive-backports相同，但尝试将其从焦点更改为精确。