The lens server installation comes with lens-ctl which provides following commands.
       bin/lens-ctl start // Start the server
       bin/lens-ctl stop // Stop the server
       bin/lens-ctl restart // Restart the server, stop followed by start
       bin/lens-ctl force [stop|restart] // Forcefully stop/restart the server
       bin/lens-ctl status // Server status
       bin/lens-ctl stack // Dump the thread stacks
       bin/lens-ctl memory-histogram // Server's memory histogram
       bin/lens-ctl memory-dump // Server's memory dump dumped to file in log directory
lens-ctl accepts the following options for all the commands