System set (Portage)
From Gentoo Wiki
The system set, also referred to as @system in Portage development, contains the software packages required for a standard Gentoo Linux installation to run properly.
The system packages are defined by the Gentoo profiles (through the packages files). An end-user can easily see which packages are seen as part of the system set by running the following emerge command:
emerge --pretend @system
Listing the system set
Various tools can be used to list the system set.
For eix, issue:
eix -c --system
- World set (Portage) — encompasses the system set, the selected set, and the @profile set.
- /etc/portage/sets — an optional directory that is used to create user defined package sets
- Selected set (Portage) — contains the packages the admin has explicitly installed
- Selected-packages_set_(Portage) — contains the user-selected "world" packages that are listed in the /var/lib/portage/world file.