How to query an unknown solr instance for its solr-spec from the command line

Question

I have inherited a big compressed archive file containing a solr instance of uncertain origin. If I unpack it on my linux box and want to find out what version it is, is there a better way than starting it up with bin/solr start etc.?

When I start solr up the dashboard knows what its solr-spec is; can I find out what it is from the command line?

Answer 1

Most of the library jars have a version string embedded in the name. So, just grep the file list for solr-*.jar

Oh, and if you have bin/solr , you already must be on Solr 4.10+ or Solr 5. Before that, you started by doing java -jar start.jar in the example directory.