Sorted:

Apache 2 startup warning: NameVirtualHost *:80 has no VirtualHosts-Collection of common programming errors

problem about wget-Collection of common programming errors

problem about system-monitoring-Collection of common programming errors

problem about rdiff-backup-Collection of common programming errors

problem about pptp-Collection of common programming errors

problem about ppc-Collection of common programming errors

problem about postgresql-9.2-Collection of common programming errors

problem about munin-Collection of common programming errors

problem about minidlna-Collection of common programming errors

problem about mail-Collection of common programming errors