Getting error with downloading and installing Percona Public GPG key on Debian or Ubuntu?

W: GPG error: http://repo.percona.com squeeze Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 1C4CBDCDCD2EFD2A
Run the following command:

gpg –keyserver pgp.mit.edu –recv-keys 1C4CBDCDCD2EFD2A

it will output:

gpg: directory `/root/.gnupg’ created
gpg: new configuration file `/root/.gnupg/gpg.conf’ created
gpg: WARNING: options in `/root/.gnupg/gpg.conf’ are not yet active during this run
gpg: keyring `/root/.gnupg/secring.gpg’ created
gpg: keyring `/root/.gnupg/pubring.gpg’ created
gpg: requesting key CD2EFD2A from hkp server pgp.mit.edu
gpg: /root/.gnupg/trustdb.gpg: trustdb created
gpg: key CD2EFD2A: public key “Percona MySQL Development Team <mysql-dev@percona.com>” imported
gpg: Total number processed: 1
gpg:               imported: 1

Then run:

gpg –armor –export 1C4CBDCDCD2EFD2A | apt-key add –