apt-get update 에러

# apt-get update   ### 아래 에러 발생 시

W: GPG error: http://nebc.nox.ac.uk unstable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B1A598E8128B92BD

# gpg --keyserver pgpkeys.mit.edu --recv-key B1A598E8128B92BD

gpg: requesting key 128B92BD from hkp server pgpkeys.mit.edu

gpg: /root/.gnupg/trustdb.gpg: trustdb created

gpg: key 128B92BD: public key "NEBC Team (Bio-Linux 6 package signing key) <helpdesk@nebc.nox.ac.uk>" imported

gpg: Total number processed: 1

gpg:               imported: 1

# gpg -a --export B1A598E8128B92BD | sudo apt-key add -

OK

# apt-get update