I saw this:
44 packages can be update
so I did this:
that didn't work. how to update the packages it's talking about?
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The packages it's talking about are not snap packages, ie. a
sudo apt full-upgrade will upgrade your deb packages that can be updated.
Normally I'd use a
sudo apt update to update the software lists so it finds all packages that can be updated, but your system has already detected 44 packages that can be upgraded. It may be worthwhile doing
sudo apt update to ensure it's not going to find some more when very soon, but it's optional.
sudo apt upgrade will upgrade most (if not all) packages, but
sudo apt full-upgrade upgrades all [deb] packages on your system from your software lists. Snap & other types of packages use different tools; these commands work on core deb packages.
upgrade (apt-get(8)) upgrade is used to install available upgrades of all packages currently installed on the system from the sources configured via sources.list(5). New packages will be installed if required to satisfy dependencies, but existing packages will never be removed. If an upgrade for a package requires the removal of an installed package the upgrade for this package isn't performed. full-upgrade (apt-get(8)) full-upgrade performs the function of upgrade but will remove currently installed packages if this is needed to upgrade the system as a whole.