Many thanks it works when I unzipped the file using command and use your command.
floyd run --gpu --env tensorflow-1.5 "gunzip mallet-2.0.8.tar.gz && tar xvf mallet-2.0.8.tar && ls && cd mallet-2.0.8/bin/ && chmod +x * &&cd .. &&cd .. && export MALLET_HOME=mallet-2.0.8/ && python test.py"