I am getting the same message following the instructions as noted above. Code:
brucew@ubuntu:~/zimbra/zdesktop/zimlets$ java -cp jetty/lib/log4j-1.2.8.jar:jetty/common/lib/commons-httpclient-3.0.jar:jetty/common/lib/mail.jar:jetty/common/lib/commons-logging.jar:jetty/common/lib/commons-codec-1.3.jar:jetty/common/lib/json.jar:jetty/common/lib/dom4j-1.5.jar:jetty/common/lib/zimbracommon.jar:jetty/webapps/service/WEB-INF/lib/zimbrastore.jar -Dzimbra.config=conf/localconfig.xml com.zimbra.cs.zimlet.ZimletUtil deploy zimlets/com_zimbra_collector.zip
Exception in thread "main" java.lang.NoClassDefFoundError: com/zimbra/cs/zimlet/ZimletUtil
Caused by: java.lang.ClassNotFoundException: com.zimbra.cs.zimlet.ZimletUtil
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:336)
Could not find the main class: com.zimbra.cs.zimlet.ZimletUtil. Program will exit.
brucew@ubuntu:~/zimbra/zdesktop/zimlets$