"Why did I use Ubuntu 6.06 LTS? unfortunately so far Zimbra provides a package for Ubuntu 6.06 LTS and not 8.04, you can download Zimbra source from other community groups which is modified to be installed on Ubuntu 8.04 but I just preferred to go with the officially supported version, for samba it doesn't really matter as it's a different server but I used 6.06 also in this tutorial."