eselect
Gentoo's multi-purpose configuration and management tool.
It consists of various modules that take care of individual administrative tasks.
Some subcommands such as kernel, locale, profile, etc. have their own usage documentation.
More information: https://wiki.gentoo.org/wiki/Eselect.
- Display a list of installed modules:
eselect
- View documentation for a specific module:
tldr eselect module
- Display a help message for a specific module:
eselect module help