Install GraalVM on Ubuntu 18.04 LTS

cd ~/
wget "https://github.com/oracle/graal/releases/download/vm-19.1.1/graalvm-ce-linux-amd64-19.1.1.tar.gz" -O graalvm.tar.gz
tar xvf graalvm.tar.gz
rm graalvm.tar.gz

echo "export PATH=$HOME/graalvm-ce-19.1.1/bin:$PATH" >> ~/.bashrc
echo "export \"JAVA_HOME=$HOME/graalvm-ce-19.1.1\"" >> ~/.bashrc

source ~/.bashrc

For adding Native Image support

gu install native-image

Make sure you have GCC installed

sudo apt install build-essential zlib1g-dev -y