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node.js installation of express isn't working

i'm trying to learn Node.js and am wanting to add express to it's library.
i'm on a 2020 macbook pro with i& core (i think some said 1M is a little different)
i'm able to use node.js. but other then downloading node.js i can't update anything else. i've tried:
adding express: $ npm install express --save
NPM error code EACCES permission denied.
adding 'nvm' : curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.3/install.sh | bash
NPM error code EACCES permission denied.
then found online that some need to download the express generator, tried this:
sudo npm install -g express-generator.
which indicated 10 packages were added, 11 were oddited. with 4 vulnerabilities.
then trying its reccomendation of npm audit fix --force gave an error of ENOLOCK.
I've updated to the newest Node.js. and have been dealing with this issue over an hour.
thank you

Error in installing openVPN module in node js

I am trying to connect Sophos VPN using nodejs. For this I am referring below link
https://github.com/luigiplr/node-openvpn
So while executing npm install node-openvpn --save command I am getting error. Can anyone please help me with this issue? Below is the screenshot of error
enter image description here

Clean your cache and try again:
npm cache clean --force
npm install node-openvpn --save

Express-generator is not working

I suspect i could have changed where node modules are installed.I have installed express-generator globally.
D:\chirp> npm install express-generator -g
When i try running
D:\chirp> express --ejs
An error popsup in the Command prompt saying
'express' is not recognised as an internal or external
command,operable program or batch file
Here is a screenshot image

Run
npm bin -g
To see where npm installs it's global binaries. Then add that directory to your PATH.
SET PATH=%PATH%;[new directory]
And add it permanently using the way that you should on your system.

simply use
npx express-generator [your projectName]

NodeJS command "npm install express --save" raising exception

I have NodeJS installed and am trying to do this tutorial for making a NodeJS chat app: http://socket.io/get-started/chat/
I created the package.json file in it's own dedicated folder, and executed in the windows command prompt this npm command from the tutorial I linked.
npm install --save express#4.10.2
The error I receive is as follows:
Error: ENOENT, stat 'C:\Users\david\AppData\Roaming\npm'
So I wemt to the ExpressJS page, tried the command they list on their site, which is.
npm install express --save
And I receive the same error. Anyone know how to fix this, please?

Error when starting Node Application - MEAN Stack

I have started to create a Node js application using MEAN Stack so i have followed the steps in the following URL to intialize a node js Application using MEAN.
Link
When i provide GRUNT or Started the Node js Application in Terminal, I am getting the following error.
events.js:72
throw er; // Unhandled 'error' event
^
Error: ENOENT, open '/home/vigneshmoha/Documents/node/branding/public/system/lib/bootstrap/dist/css/bootstrap.css'
[nodemon] app crashed - waiting for file changes before starting...
npm version 1.4.15
Node js version v0.10.28
MongoDB version v2.6.1
I haven't changed anything else. Am i missing anything?

I am not sure about this but try installing bower with the command..
npm install -g bower
and then sudo bower install --allow -root
Now check if the files are created

try this
npm cache clean
npm install

I just had the exact same problem (on Mac OS X 10.9). Running npm install without sudo fixed it. Seems like bower is causing some troubles when used with sudo.

This error might be also due to errors in your Nodejs application. Fix the errors. You might also need to install bower:
npm install -g bower . tested on windows 10 and it worked.

Had the same issue., tried to delete node_modules, did npm install., but the scenario remained same.
On restarting the system, it seems to be back to normal.