System Changes / Package changes caused proftpd-common proftpd

root@beta:/etc/postfix/ssl# apt-get install proftpd proftpd-common ucf

Reading package lists... Done Building dependency tree Reading state information... Done Package proftpd-common is a virtual package provided by: proftpd 1.3.0-9ubuntu0.1 You should explicitly select one to install. E: Package proftpd-common has no installation candidate

root@beta:/etc/postfix/ssl# apt-get install proftpd ucf Works perfectly so far