Well, I downloaded the alfresco tomcat release. First of all I did not find any alfresco.sh only a lousy windows equivalent (alfresco.bat) script as mentioned in the docs. Second, I don't need a whole new installation of tomcat. So i downloaded the war release of alfresco. Unfortunately I could not deploy it on my tomcat, because 1st I got an error message saying that ImageMagick couldn't convert an image because that very same image does not exist and 2nd right after that the deployment process freezes and with it tomcat. Btw I use tomcat 6.