sascha@sascha-HP-250-G7-Notebook-PC:~$ sudo apt update
[sudo] Passwort für sascha:
OK:1 http://dl.google.com/linux/chrome/deb stable InRelease
OK:2 http://de.archive.ubuntu.com/ubuntu focal InRelease
Holen:3 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
OK:4 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal InRelease
Holen:5 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Holen:6 http://de.archive.ubuntu.com/ubuntu focal-security InRelease [109 kB]
Ign:7 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 DEP-11 Metadata
Ign:8 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 48x48 Icons
Ign:9 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64 Icons
Ign:10 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64@2 Icons
Ign:11 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 c-n-f Metadata
Ign:7 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 DEP-11 Metadata
Ign:8 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 48x48 Icons
Holen:12 http://de.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages [955 kB]
Ign:9 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64 Icons
Ign:10 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64@2 Icons
Holen:13 http://de.archive.ubuntu.com/ubuntu focal-updates/main i386 Packages [466 kB]
Holen:14 http://de.archive.ubuntu.com/ubuntu focal-updates/main amd64 DEP-11 Metadata [265 kB]
Holen:15 http://de.archive.ubuntu.com/ubuntu focal-updates/universe i386 Packages [567 kB]
Holen:16 http://de.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages [768 kB]
Ign:11 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 c-n-f Metadata
Ign:7 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 DEP-11 Metadata
Holen:17 http://de.archive.ubuntu.com/ubuntu focal-updates/universe amd64 DEP-11 Metadata [303 kB]
Ign:8 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 48x48 Icons
Holen:18 http://de.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 DEP-11 Metadata [2.468 B]
Holen:19 http://de.archive.ubuntu.com/ubuntu focal-backports/universe amd64 DEP-11 Metadata [1.768 B]
Holen:20 http://de.archive.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [24,4 kB]
Holen:21 http://de.archive.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [58,2 kB]
Ign:9 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64 Icons
Ign:10 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64@2 Icons
Ign:11 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 c-n-f Metadata
Ign:7 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 DEP-11 Metadata
Fehl:8 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 48x48 Icons
404 Not Found [IP: 91.189.95.85 80]
Ign:9 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64 Icons
Ign:10 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main DEP-11 64x64@2 Icons
Ign:11 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 c-n-f Metadata
Ign:7 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu focal/main amd64 DEP-11 Metadata
Es wurden 3.733 kB in 2 s geholt (1.530 kB/s).
Paketlisten werden gelesen... Fertig
E: Fehlschlag beim Holen von http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/dists/focal/main/dep11/icons-48x48.tar 404 Not Found [IP: 91.189.95.85 80]
E: Einige Indexdateien konnten nicht heruntergeladen werden. Sie wurden ignoriert oder alte an ihrer Stelle benutzt.
sascha@sascha-HP-250-G7-Notebook-PC:
答案1
这http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/dists/focal/main/dep11/icons-48x48.tar即使没有代理，位置确实也会返回 404。
在最新的 20.04 LTS 上我无法重现此问题。
您可以尝试以下命令来修复该问题：
# remove local package lists
rm /var/lib/apt/lists/* -rf
# re-add PPA again
sudo add-apt-repository ppa:gezakovacs/ppa