-### for kerberos access; need keytab ###
-aptitude install krb5-user ntpdate
-cat >>/etc/ssh/sshd_config <<EOF
-# accept Kerberos
-GSSAPIAuthentication yes
-GSSAPICleanupCredentials yes
-GSSAPIKeyExchange yes
-EOF
-# install keytab
-# install /root/.k5login
-ntpdate
-
-### for collaboration ###
-aptitude install screen
-
-### the main event ###
-scp black-mesa:/etc/apt/sources.list.d/* /etc/apt/sources.list