emerge --help
This is the output of emerge --help
emerge (manual) is a Gentoo Linux package management tool.
emerge: the other white meat (command-line interface to the Portage system)
Usage:
emerge [ options ] [ action ] [ ebuild | tbz2 | file | @set | atom ] [ ... ]
emerge [ options ] [ action ] < system | world >
emerge < --sync | --metadata | --info >
emerge --resume [ --pretend | --ask | --skipfirst ]
emerge --help [ --verbose ]
Options: -[abBcCdDefgGhjkKlnNoOpPqrsStuvV]
[ --color < y | n > ] [ --columns ]
[ --complete-graph ] [ --deep ]
[ --jobs JOBS ] [ --keep-going ] [ --load-average LOAD ]
[ --newuse ] [ --noconfmem ] [ --nospinner ]
[ --oneshot ] [ --onlydeps ] [ --quiet-build [ y | n ] ]
[ --reinstall changed-use ] [ --with-bdeps < y | n > ]
Actions: [ --depclean | --list-sets | --search | --sync | --version ]
For more help consult the man page.