Step 1. Download and Install Gradle.
# cd /opt
# sudo wget https://services.gradle.org/distributions/gradle-3.1-bin.zip
# sudo unzip gradle-3.1-bin.zip
# sudo ln -s gradle-3.1 gradle
Step 2. Set Gradle Environment Value.
# sudo vim /etc/profile.d/gradle-env.sh
export GRADLE_HOME=/opt/gradle
export PATH=$PATH:$GRADLE_HOME/bin
# sudo source /etc/profile.d/gradle-env.sh
