Hints about using GENI Infrastructure as well as other tools in the GENI system

git Commands

git clone [url]
git add -A . (add all files and folders in the current directory)
git commit -m "commit message"
git status (to check the status of your local copy)
git fetch origin
git merge origin/master
git push origin master (upload your local copy to master (global) repository)

OpenFlow Trema

To restart Trema controller as well as the attached switch:

1. kill trema process: kill $(pidof ruby) 
2. delete lock file: rm /opt/trema...../tmp/pid/controller.pid  (controller is the name of your controller, in the case of Load Balancing, its `Load_Balancer`)
3. unlink the switches from controller: ovs-vsctl del-controller br0
4. start controller: /opt/trema....../trema run controller.rb (controller is the name of your controller, in the case of Load Balancing, its  load_balancer.rb)
5. link switches to the controller: ovs-vsctl set-controller br0 tcp:127.0.0.1 
 (might need to wait for 2 seconds for the switch to connect to the controller, to verify that, print something in the "switch_ready" function so that you can see the output when switch is connected)