tronyx@wrekx:~/Desktop$ sudo dpkg -i Nessus-3.0.6-debian3_i386.deb
(Reading database ... 134775 files and directories currently installed.)
Unpacking nessus (from Nessus-3.0.6-debian3_i386.deb) ...
dpkg: error processing Nessus-3.0.6-debian3_i386.deb (--install):
 trying to overwrite `/etc/init.d/nessusd', which is also in package nessusd
Errors were encountered while processing:
 Nessus-3.0.6-debian3_i386.deb