hi, i've a VM in Virtualbox with System as described above. 
I downloaded alfresco 4.0d and tried to execute this: 
 ./alfresco-community-4.0.d-installer-linux-x64.bin 
bash: ./alfresco-community-4.0.d-installer-linux-x64.bin: Kann die Datei nicht ausführen.
but filepermissions are :
-rwxrwxrwx  1 root   root  548037361 31. Mai 11:34 alfresco-community-4.0.d-installer-linux-x64.bin*
so how could i execute this file ?
i tried it also on a ubuntu 1204lts but i got the same error and every time a downloaded alfresco 4.0d