大家好，我遇到了以下问题好几个月了，我不知道该如何解决。每次我启动软件更新程序时，设置和实时补丁按钮都不起作用。如果我搜索软件和更新，应用程序的名称不会显示在搜索结果中。即使在系统设置中，我也无法执行软件和更新按钮。
sudo apt-cache policy
Package files:
100 /var/lib/dpkg/status
release a=now
500 http://ppa.launchpad.net/ubuntu-desktop/ppa/ubuntu focal/main i386 Packages
release v=20.04,o=LP-PPA-ubuntu-desktop,a=focal,n=focal,l=PPA for Ubuntu Desktop,c=main,b=i386
origin ppa.launchpad.net
500 http://ppa.launchpad.net/ubuntu-desktop/ppa/ubuntu focal/main amd64 Packages
release v=20.04,o=LP-PPA-ubuntu-desktop,a=focal,n=focal,l=PPA for Ubuntu Desktop,c=main,b=amd64
origin ppa.launchpad.net
500 https://packages.microsoft.com/repos/ms-teams stable/main amd64 Packages
release o=ms-teams stable,a=stable,n=stable,l=ms-teams stable,c=main,b=amd64
origin packages.microsoft.com
500 http://ppa.launchpad.net/lutris-team/lutris/ubuntu focal/main i386 Packages
release v=20.04,o=LP-PPA-lutris-team-lutris,a=focal,n=focal,l=Lutris stable,c=main,b=i386
origin ppa.launchpad.net
500 http://ppa.launchpad.net/lutris-team/lutris/ubuntu focal/main amd64 Packages
release v=20.04,o=LP-PPA-lutris-team-lutris,a=focal,n=focal,l=Lutris stable,c=main,b=amd64
origin ppa.launchpad.net
500 http://ppa.launchpad.net/linuxuprising/java/ubuntu focal/main i386 Packages
release v=20.04,o=LP-PPA-linuxuprising-java,a=focal,n=focal,l=Oracle Java,c=main,b=i386
origin ppa.launchpad.net
500 http://ppa.launchpad.net/linuxuprising/java/ubuntu focal/main amd64 Packages
release v=20.04,o=LP-PPA-linuxuprising-java,a=focal,n=focal,l=Oracle Java,c=main,b=amd64
origin ppa.launchpad.net
1001 http://archive.lambdalabs.com/ubuntu focal/main i386 Packages
release o=lambdalabs.com,n=focal,l=Lambda Labs Ubuntu repository (Focal),c=main,b=i386
origin archive.lambdalabs.com
1001 http://archive.lambdalabs.com/ubuntu focal/main amd64 Packages
release o=lambdalabs.com,n=focal,l=Lambda Labs Ubuntu repository (Focal),c=main,b=amd64
origin archive.lambdalabs.com
500 http://dl.google.com/linux/chrome/deb stable/main amd64 Packages
release v=1.0,o=Google LLC,a=stable,n=stable,l=Google,c=main,b=amd64
origin dl.google.com
500 https://download.docker.com/linux/ubuntu focal/stable amd64 Packages
release o=Docker,a=focal,l=Docker CE,c=stable,b=amd64
origin download.docker.com
500 https://dl.winehq.org/wine-builds/ubuntu focal/main all Packages
release o=dl.winehq.org,a=focal,n=focal,l=winehq,c=main,b=all
origin dl.winehq.org
500 https://dl.winehq.org/wine-builds/ubuntu focal/main i386 Packages
release o=dl.winehq.org,a=focal,n=focal,l=winehq,c=main,b=i386
origin dl.winehq.org
500 https://dl.winehq.org/wine-builds/ubuntu focal/main amd64 Packages
release o=dl.winehq.org,a=focal,n=focal,l=winehq,c=main,b=amd64
origin dl.winehq.org
500 http://security.ubuntu.com/ubuntu focal-security/multiverse i386 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=multiverse,b=i386
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=multiverse,b=amd64
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu focal-security/universe i386 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=universe,b=i386
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu focal-security/universe amd64 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=universe,b=amd64
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu focal-security/restricted i386 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=restricted,b=i386
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu focal-security/restricted amd64 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=restricted,b=amd64
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu focal-security/main i386 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=main,b=i386
origin security.ubuntu.com
500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=main,b=amd64
origin security.ubuntu.com
100 http://de.archive.ubuntu.com/ubuntu focal-backports/universe i386 Packages
release v=20.04,o=Ubuntu,a=focal-backports,n=focal,l=Ubuntu,c=universe,b=i386
origin de.archive.ubuntu.com
100 http://de.archive.ubuntu.com/ubuntu focal-backports/universe amd64 Packages
release v=20.04,o=Ubuntu,a=focal-backports,n=focal,l=Ubuntu,c=universe,b=amd64
origin de.archive.ubuntu.com
100 http://de.archive.ubuntu.com/ubuntu focal-backports/main i386 Packages
release v=20.04,o=Ubuntu,a=focal-backports,n=focal,l=Ubuntu,c=main,b=i386
origin de.archive.ubuntu.com
100 http://de.archive.ubuntu.com/ubuntu focal-backports/main amd64 Packages
release v=20.04,o=Ubuntu,a=focal-backports,n=focal,l=Ubuntu,c=main,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/multiverse i386 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=multiverse,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=multiverse,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/universe i386 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=universe,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=universe,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/restricted i386 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=restricted,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/restricted amd64 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=restricted,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/main i386 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=main,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=main,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/multiverse i386 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=multiverse,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/multiverse amd64 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=multiverse,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/universe i386 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=universe,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=universe,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/restricted i386 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=restricted,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/restricted amd64 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=restricted,b=amd64
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/main i386 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=main,b=i386
origin de.archive.ubuntu.com
500 http://de.archive.ubuntu.com/ubuntu focal/main amd64 Packages
release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=main,b=amd64
origin de.archive.ubuntu.com
sudo apt update
Hit:1 http://ppa.launchpad.net/linuxuprising/java/ubuntu focal InRelease
Hit:2 http://ppa.launchpad.net/lutris-team/lutris/ubuntu focal InRelease
Hit:3 https://download.docker.com/linux/ubuntu focal InRelease
Hit:4 http://de.archive.ubuntu.com/ubuntu focal InRelease
Hit:5 https://dl.winehq.org/wine-builds/ubuntu focal InRelease
Hit:6 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:7 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:8 http://ppa.launchpad.net/ubuntu-desktop/ppa/ubuntu focal InRelease
Hit:9 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:10 https://packages.microsoft.com/repos/ms-teams stable InRelease
Hit:11 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:12 http://archive.lambdalabs.com/ubuntu focal InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
sudo apt full-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
libfwupdplugin1 libnvidia-cfg1-470 libnvidia-common-470
libnvidia-compute-470 libnvidia-compute-470:i386 libnvidia-decode-470
libnvidia-decode-470:i386 libnvidia-encode-470 libnvidia-encode-470:i386
libnvidia-extra-470 libnvidia-extra-470:i386 libnvidia-fbc1-470
libnvidia-fbc1-470:i386 libnvidia-gl-470 libnvidia-gl-470:i386
libnvidia-ifr1-470 libnvidia-ifr1-470:i386 nvidia-compute-utils-470
nvidia-utils-470 xserver-xorg-video-nvidia-470
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
