updating ALL installed packages

[sven]

How do I update all installed packages? emerge --update system and emerge --update world just updates the packages listed in the system and world variables, but these are not all...

[Jeevz]

As far as I know, that should be everything unless you installed something without Portage. The list of packages for world are stored in /var/cache/edb/world

For more info you can always check out the Portage manual (if you haven't already).