Check if list of sites are up or down

doublecheck.sh

#!/bin/bash
# Down verification via dns/dig by Griffin ^_^
# basically the same thing as before, just running the "down" sites through dig
# to make sure they are really not available.  Sites that pass this test
# are placed in a third site category, as they may be unavailable or blocked in
# the test location, but have defined nameservers in DNS records.

readarray -t array < sitesdown.txt

    for i in "${array[@]}"
      do (
            if [[ $(dig @8.8.8.8 +short NS "$i") ]]
              then echo "$i" >> sitemeh.txt
            fi
       )
done

sitesupdown.sh

#!/bin/bash
# Up/Down checker by Griffin ^_^
# Run both with the following command (making sure to change the folder name):
# find ~/by -type d -exec sh -c 'cd "{}" ; ~/by/sitesup.sh ;' \;

readarray -t array < *seeds.txt

    for i in "${array[@]}"
      do (
            if curl -s --head --request GET "$i" | grep -E '200|300|301|302' > /dev/null
              then echo "$i" >> sitesup.txt
            else echo "$i" >> sitesdown.txt
            fi
       )
done