...
sudo su - root
cd /var/lib/tomcat7
mkdir indexes
cd indexes
unzip /home/ihtsdo/refset/data/refset-indexes.zip -d .
mv indexes refset
chmod -R a+rw rwx /var/lib/tomcat7/indexes/refset/*
chown -R tomcat7:tomcat7 /var/lib/tomcat7/indexes/refset/*
...