The easiest way to upgrade node.js and npm, in my opinion is to uninstall existing node.js and npm and which can be done with this single command
sudo apt-get remove nodejs
Now we need to install latest version of nodejs and npm and both can be achieved with single command as in the previous case. But before that we need to update the repossitory. For that try running the following terminal command
curl -sL https://deb.nodesource.com/setup | sudo bash -
If you don’t have “curl” installed in your system, you will have to do that with the following command
sudo apt-get install curl
Now finally it is time to run the command sudo apt-get install nodejs to install nodejs and npm in a single go (installing nodejs will install npm also).
Now check the node js and npm versions using the command
You can see that both are of the latest versions
1. SSL Error: SELF_SIGNED_CERT_IN_CHAIN
When you try to install nodeJs packages like expressJS via package.json you may stuck up with this error. This is due to the fact that you are using an older version of npm and npm no longer supports its self-signed certificates.
To fix this
you can either upgrade your npm (it is what i did) using following command
npm install npm -g –ca=null
Or you can tell the npm to use existing registrars as below.
npm config set ca=””
This experiment has got three parts.
1. Front end :
2. Back end
Processing(java flavour) installed with openni and OSC libraries to capture the hand movements and send them as OSC signals.
This is used as connector between the above two parts. Continue reading