if you stop/kill the process (closing pharo), jupyter start it again. By now kernel.json file do not open pharo in "headless" mode, because JupiterTalk is not released and I'm suddenly updating the code, anyway...there's nothing like Pharo debugger...
Did you find libzeromq.so ? what version do you have? -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html