[gentoo-user] About update question

[Stephen Liu]

Hi folks,

Gentoo-amd64

I need to update all running packages to their latest version, if available on Internet.  Performed following steps;

# emerge --sync
# emerge --update world

Please advise whether any further step is necessary thereafter.

If I expect to clear all empty files on the box which will take up space, which command shall I run.  How can I ascertain whether they are needed there.  TIA

B.R.
SL