riptidewave93

#!/bin/bash

NumCPU=$(grep -c ^processor /proc/cpuinfo)
NumJobs=$(calc -p "ceil(2*$NumCPU+1)")
export CONCURRENCY_LEVEL=$NumJobs

baseURL="https://www.kernel.org/pub/linux/kernel/v3.x/"
latest="$(curl -s $baseURL | sed -n 's|\(.*\)\(linux-\)\(.*\)\(\.tar\.xz<\)\(.*\)|\3|p' | sort --version-sort | tail -n1)"

[ ! "$latest" ]  &&  { echo "Are we offline?" >&2; exit 1; }