Check for the latest versions on https://github.com/firecracker-microvm/firecracker/releases and https://github.com/firecracker-microvm/firectl/releases ; for our example we'll go with 0.24.6 and 0.1.0.
wget https://github.com/firecracker-microvm/firecracker/releases/download/v0.24.6/firecracker-v0.24.6-x86_64.tgz
wget https://firectl-release.s3.amazonaws.com/firectl-v0.1.0
tar xzf firecracker-v0.24.6-x86_64.tgz
mv release-*/* .