Fix 'Unmet dependencies' Error in Ubuntu/Debian: 'sudo apt upgrade'

This error message indicates that there are unmet dependencies for the packages 'libpam-systemd', 'systemd', and 'udev'. To fix this issue, you can try running the following command:

sudo apt --fix-broken install

This command will attempt to correct any broken dependencies and install any missing packages. Once the command completes, you can then try running 'sudo apt upgrade' again.