Below are the steps I took to download parquet-tools, and create a command to execute it.

git clone https://github.com/Parquet/parquet-mr.git
cd parquet-tools && mvn clean package -Plocal
mkdir -p /usr/local/parquet-tools-1.6.0/jars
cp target/parquet-tools-1.6.0.jar /usr/local/parquet-tools-1.6.0/jars
cd /usr/local/parquet-tools-1.6.0
mkdir bin
touch bin/parquet-tools
echo $'#!/bin/bash\nexec java -jar /usr/local/parquet-tools-1.6.0/jars/parquet-tools-1.6.0.jar "$@"' > /usr/local/parquet-tools-1.6.0/bin/parquet-tools
chmod +x bin/parquet-tools

Make sure to add your parquet-tools script to your $PATH. Add this to your bash config:

export PATH=$PATH:/usr/local/parquet-tools-1.6.0/bin