mainlog shows ppa packages

[EmilDo]

drgb@HPUb:~$ ppa-purge
Warning: Required ppa-name argument was not specified
Usage: sudo ppa-purge [options] <ppa:ppaowner>[/ppaname]

ppa-purge will reset all packages from a PPA to the standard
versions released for your distribution.

Options:
 -p [ppaname] PPA name to be disabled (default: ppa)
 -o [ppaowner] PPA owner
 -s [host] Repository server (default: ppa.launchpad.net)
 -d [distribution] Override the default distribution choice.
 -y Pass -y --force-yes to apt-get or -y to aptitude
 -i Reverse preference of apt-get upon aptitude.
 -h Display this help text

Example usage commands:
 sudo ppa-purge -o xorg-edgers
 will remove https://launchpad.net/~xorg-edgers/+archive/ppa

 sudo ppa-purge -o sarvatt -p xorg-testing
 will remove https://launchpad.net/~sarvatt/+archive/xorg-testing

 sudo ppa-purge [ppa:]ubuntu-x-swat/x-updates
 will remove https://launchpad.net/~ubuntu-x-swat/+archive/x-updates

Notice: If ppa-purge fails for some reason and you wish to try again,
(For example: you left synaptic open while attempting to run it) simply
uncomment the PPA from your sources, run apt-get update and try again.

drgb@HPUb:~$ ubuntu-bug ubuntu-release-upgrader-core
comm: /var/log/dmesg: Datei oder Verzeichnis nicht gefunden
drgb@HPUb:~$

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
Uname: Linux 4.15.0-118-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 7 17:04:13 2020
InstallationDate: Installed on 2018-08-27 (771 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-10-07 (0 days ago)
VarLogDistupgradeTermlog: