Script to check a list of proxy IP addresses

Variant 1:
sed '/^$/d' proxy-list.txt > proxy-list2.txt

for sLine in $(< proxy-list2.txt); do
  export http_proxy="http://$sLine"
  echo "Testing $sLine"
  wget --spider --timeout=5 --tries=1 http://www.example.com
done
rm proxy-list2.txt

Variant 2:
sed '/^$/d' proxy.txt > proxylist.txt

for sLine in $(< proxylist.txt); do
  export http_proxy="http://$sLine"
  echo "Testing $sLine"
  curl --proxy $sLine
done
rm proxylist.txt