checks your coin's dnsseed response node count
get ruby, then:
git clone https://github.com/linki/dnsseed.git
cd dnsseed
bundle install
./dnsseed.rb dnsseed.bluematt.me
=> 21 active nodes
it prints the number of IPs returned by your dnsseed node. pass it a threshold and check the exit code to make sure your dnsseed node still works, e.g. for use in a ci server.
./dnsseed.rb dnsseed.bluematt.me 20
=> 21 active nodes
echo $?
=> 0
./dnsseed.rb dnsseed.bluematt.me 22
=> 21 active nodes
echo $?
=> 1
works for other coins as well:
./dnsseed.rb dnsseed.earthcointools.org
=> 12 active nodes
don't have ruby? use docker:
docker run quay.io/linki/dnsseed dnsseed.earthcointools.org
=> 12 active nodes