http://ppa.launchpad.net/ondrej/pkg-gearman/ubuntu impish 릴리스 404 찾을 수 없음 [닫기]

안녕하세요, 저는 Linux 서버(debian 10 Buster)를 가지고 있습니다.

명령어 입력 후 : sudo apt-get update업데이트를 위해

디스플레이 오류:

Hit:1 http://deb.debian.org/debian buster InRelease
Hit:2 http://deb.debian.org/debian buster-updates InRelease                                                                                       
Hit:3 http://security.debian.org buster/updates InRelease                                                                                         
Get:4 http://apt.postgresql.org/pub/repos/apt buster-pgdg InRelease [110 kB]                                                                                                           
Ign:5 http://ppa.launchpad.net/ondrej/pkg-gearman/ubuntu impish InRelease                                                                                                              
Get:6 http://ppa.launchpad.net/ondrej/php/ubuntu impish InRelease [23.9 kB]                                                                                
Hit:7 https://packages.sury.org/php buster InRelease                                       
Err:8 http://ppa.launchpad.net/ondrej/pkg-gearman/ubuntu impish Release
  404  Not Found [IP: 1200:89c:6950:8000::17 80]
Get:9 http://apt.postgresql.org/pub/repos/apt buster-pgdg/main amd64 Packages [246 kB]
Err:6 http://ppa.launchpad.net/ondrej/php/ubuntu impish InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4F4E..
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/ondrej/pkg-gearman/ubuntu impish 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: GPG error: http://ppa.launchpad.net/ondrej/php/ubuntu impish InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4F4E.....
E: The repository 'http://ppa.launchpad.net/ondrej/php/ubuntu impish InRelease' is not signed.
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 Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1
W: Target Translations (main/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1
W: Target Translations (main/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/php.list:1 and /etc/apt/sources.list.d/php7.list:1

이 문제를 어떻게 해결할 수 있나요?