Menu System Tools/Software Updater not working after, Lubuntu upgrade from 16.04 to 18.04

[Ralf Mardorf]

On Sun, 2018-08-26 at 09:22 +0200, Ralf Mardorf wrote:
> On Sun, 2018-08-26 at 08:20 +0200, grasso wrote:
> > My question is now:
> > Is it a good check to try running "sudo apt-get upgrade" to see if
> > update will then be performed, because I did not yet tried.
> 
> Yesno. Don't follow the link you posted.
> 
> First run
> 
>   sudo apt upgrade
             ^^^^^^^
             ^^^^^^^
This is a typo, it should read

first run

  sudo apt update

_update_, not _upgrade_

> 
> (alternatively you could run
> 
>   sudo apt-get update)
> 
> this will sync the package index files, not the packages.
> 
> Then run
> 
>   sudo apt full-upgrade
> 
> ('sudo apt-get upgrade' isn't good, an alternative would be
> 
>   sudo apt-get dist-upgrade)
> 
> If there should be upgrades, they will be shown. You need to confirm if
> you want to continue and do the upgrade or if you don't want to upgrade.
> 
> See
> 
> http://manpages.ubuntu.com/manpages/bionic/man8/apt-get.8.html
> 
> and
> 
> http://manpages.ubuntu.com/manpages/bionic/man8/apt.8.html
> 
> if you want to understand the difference between 'upgrade' and 'full-
> upgrade' or 'dist-upgrade'.
> 
> By default there is one important difference between the "old"
> 'sudo apt-get dist-upgrade' and the "new" 'sudo apt full-upgrade'.
> 
> By default 'apt-get' caches the packages in /var/cache/apt/archives/,
> 'apt' doesn't.
> 
> If you want to use the "new" apt, but cache the packages, too, run
> 
>   sudo apt full-upgrade -o APT::Keep-Downloaded-Packages=1
> 
> 
>