Force.com Migration Tool on Ubuntu (Lucid)

Since the tool is based on Ant, I apt-get the ant package. The Guide on the tool talked about putting the jar file into the lib directory of ANT_HOME. Well, I don't know where the ANT_HOME (not found in env), let alone locating its lib. Eventually I found the lib dir with some Googling. It's /usr/share/ant/lib - well, should be obvious enough to me... With the jar file in place and config files done (build.xml, build.properties, package.xml), the tool did run successfully to do the things I needed.