Gentoo update
From thelinuxwiki
commands to run to update gentoo devices
emerge --sync
emerge -uavND --quiet world
revdep-rebuild --quiet
emerge --depclean -p
- Review what depclean will remove... if ok, rerun without -p option.
Re-compiling everything (advisable after gcc or glibc update)
emerge -e --quiet system
world package list
/var/lib/portage/world