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UC Davis Center for Integrated Computing and STEM Education (C-STEM) --- Research and Outreach
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Q: I cannot launch Linkbot Labs from C-STEM Studio in Raspberry Pi.
A: In the current version of Linkbot Labs for Raspberry Pi, you will need to connect to the internet in order to launch Linkbot Labs.


Q: In C-STEM Studio, when I click “Web-Based Computing”, it display that “This site can’t be reached, refused to connect”. How can I fix this?
A: By default, the Apache web server in C-STEMbian is not started. You can start, stop, reload and restart it by the commands below.

  • start it with: sudo /etc/init.d/apache2 start
  • stop it: sudo /etc/init.d/apache2 stop
  • reload the config with: sudo /etc/init.d/apache2 reload
  • restart (stop followed by start): sudo /etc/init.d/apache2 restart


Q: If I do not use Linkbot lab, how can I disable the service for Linkbot lab to save CPU time?
A: baromeshd is an auto-start service during start-up.  You can use the command ‘sudo systemctl stop baromeshd.service’ to temporary stop it and the command ‘sudo systemctl disable baromeshd.service’ to permanently stop it from auto starting.

Q: Linkbot Labs is open but it says I am in Offline Mode even though I am connected to the internet.

A: You may need to restart the baromeshd service. You can use the command ‘sudo service baromeshd start’