check_dead.sh

#!/bin/bash
# usage: 
# cd Resources
# sh check_dead.sh

for file in *.md; do
    echo "====== Reading file: ${file} ======"
    while read line; do

        url=$(echo "$line" | sed s/.*\(// | sed s/\)// | sed s/^##.*//)

        if [[ ! -z "$url" ]]; then
            echo "- Checking URL: ${url}"
            curl -s --head "${url}" | head -n 1 | grep "HTTP/1.[01] [^23].."
        fi
    done <"$file"
done