How to index in Solr?

Question

Search Engine Optimization

Hi all !!
i started solr via
java -jar start.jar command
then i tried to index data but got bad request 400 for url ....
indexed via post.jar in solr and via curl here are the commands i used
$ java -Dc=testcore -jar post .jar hd.xml

$ java -Durl= localhost:8983/solr/testcore/update -jar post.jar hd.xml
curl ' localhost:8983/solr/update/json?commit=true ' --data-binary @books .json -H 'Content-type:application/json'