I deleted the Zimbra directory and tried both the ./install.sh and dpkg -i zimbra-core_4.5.3_GA_733.DEBIAN3.1_i386.deb.
The first still asks if I want to upgrade (both yes and no finally end up in the same error as before). Do I need to remove more files?
The second give me this error now:
h1199365:/usr/src/zcs/packages# dpkg -i zimbra-core_4.5.2_GA_699.DEBIAN3.1_i386.deb
(Reading database ... 35362 files and directories currently installed.)
Preparing to replace zimbra-core 4.5.2_GA_699.DEBIAN3.1 (using zimbra-core_4.5.2_GA_699.DEBIAN3.1_i386.deb) ...
Unpacking replacement zimbra-core ...
Setting up zimbra-core (4.5.2_GA_699.DEBIAN3.1) ...
chown: cannot access `/opt/zimbra/a*': No such file or directory
chown: cannot access `/opt/zimbra/s[a-su-z]*': No such file or directory
chown: cannot access `/opt/zimbra/perdition-1.17': No such file or directory
chown: cannot access `/opt/zimbra/apache-tomcat-*': No such file or directory
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
dpkg: error processing zimbra-core (--install):
subprocess post-installation script returned error exit status 1
Errors were encountered while processing: