Major Description
Mahout directory layout is mahout-distribution-0.6/examples/bin which no longer exists under the bigtop installation of mahout.
Bigtop installs under /usr/share/doc/mahout; the script cluster-reuters.sh defines MAHOUT=../../bin/mahout which is not valid under bigtop mahout installation. Fix is to change MAHOUT executable from ../../ to MAHOUT_HOME/bin/mahout like the other HADOOP_COMPONENTS.