For example there is no VirtualBox, Texmaker, LyX, calibre, Redshift.
I have ran sudo apt update and sudo apt full-upgrade. I have not used BleachBit. The only thing wrong in my computer seems to be that I often get an error message like this one when I run sudo apt update:
AppStream system cache was updated, but problems were found: Metadata files have errors: /var/cache/app-info/xmls/fwupd.xml
Reading package lists... Done
E: Problem executing scripts APT::Update::Post-Invoke-Success 'if /usr/bin/test -w /var/cache/app-info -a -e /usr/bin/appstreamcli; then appstreamcli refresh-cache > /dev/null; fi'
E: Sub-process returned an error code
, which I would also like to fix by the way.
Things I tried that did not help:
As advised in Library corruption error during apt-get update, I ran sudo apt install --reinstall libappstream3 and then sudo apt purge libappstream3, and then I also restarted my computer. Then I ran sudo apt install --reinstall libappstream3 again sudo apt install --reinstall libappstream4 and I restarted the computer again.
