concatinated multiple commands to reduces layers and image size

Dockerfile

@@ -1,10 +1,10 @@
 FROM phusion/baseimage:master
 MAINTAINER r0gger
 
-RUN apt-get update
-RUN apt-get install -y wget cabextract hashdeep xmlstarlet trash-cli unzip iputils-ping genisoimage aria2
-RUN apt-get clean -y
-RUN rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+RUN apt-get update && \
+    apt-get install -y wget cabextract hashdeep xmlstarlet trash-cli unzip iputils-ping genisoimage aria2 rsync && \
+    apt-get clean -y && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 ENV SYSTEMS="all"
 ENV OFFICE=""