After some paranoiac permission setting in my home folder I wanted to update repository and received error:
root@zzz:~# aptitude update
Hit http://ru.archive.ubuntu.com maverick-updates/multiverse amd64 Packages
Fetched 2,952B in 17s (167B/s)
W: GPG error: http://ppa.launchpad.net maverick Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0EE1BF5F3C8E2A7F
