I am extremely new to Ubuntu and linux in general. I have installed Ubuntu 10.04 and followed the steps outlined in several postings. After a little trial and error I was able to set up and access the CalendarServer and configure users by modifying the accounts.xml and caldavd-dev.plist. I could connect via iCal and the two iphones in my network. Since i was able to get it up and running I decided to build a server to host the Calendar Server, afp file sharing, samba and use the server for time Machine backups. Using a pentium 4 box I installed Ubuntu 10.04 server and followed these steps: 1) edit /etc/fstab to enable xattrs by adding the “user_xattr” option. e.g. (all on one line): UUID=8f2bb850-0e8f-4d81-bba5-fb93ef9b9990 / ext4 errors=remount-ro,user_xattr 0 1 after doing the above you need to reboot, or “sudo mount / -o remount” 2) sudo apt-get build-dep postgresql 3) sudo apt-get install python-setuptools python-xattr python-twisted subversion curl 4) svn co http://svn.macosforge.org/repository/calendarserver/CalendarServer/trunk CalendarServer 5) cd CalendarServer ; ./run -s when I run ./run -s i get this: Downloading libevent... % Total %Received % Xferd AverageSpeed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- 0:40:24 --:--:-- The successful i