[gentoo-user] Consistency checking

Hi,

I know of three commands to check the consistency of a Gentoo system:


    eix-sync && emerge --color=n -p -v --newuse --update --deep world
    emerge -p -v --depclean
    revdep-rebuild --ignore -p -v

of course, one has to remove the -p and -v flags after checking the
putput of the commands.

What else can be checked and should be checked from time to time or
after each update?

Thank you very much in advance for any help!

Best regards,
mcc