nodemon command is not recognized in terminal for node js server

You need to install it globally

npm install -g nodemon
# or if using yarn
yarn global add nodemon

And then it will be available on the path (I see now that you have tried this and it didn't work, your path may be messed up)

If you want to use the locally installed version, rather than installing globally then you can create a script in your package.json

"scripts": {
    "serve": "nodemon server.js"
  },

and then use

npm run serve

optionally if using yarn

# without adding serve in package.json
yarn run nodemon server.js
# with serve script in package.json
yarn run serve

npm will then look in your local node_modules folder before looking for the command in your global modules

npm install -g nodemon
npm WARN deprecated fsevents@2.1.3: Please update to v 2.2.x
C:UserscluAppDataRoaming pm odemon -> C:UserscluAppDataRoaming pm ode_modules odemonin odemon.js

> nodemon@2.0.6 postinstall C:UserscluAppDataRoaming pm ode_modules odemon
> node bin/postinstall || exit 0

Love nodemon? You can now support the project via the open collective:
> https://opencollective.com/nodemon/donate

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@~2.1.2 (node_modules odemon ode_moduleschokidar ode_modulesfsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

https://github.com/remy/nodemon

Monitor for any changes in your node.js application and automatically restart the server - perfect for development

nodemon is a tool that helps develop node.js based applications by automatically restarting the node application when file changes in the directory are detected.

nodemon does not require any additional changes to your code or method of development. nodemon is a replacement wrapper for node. To use nodemon, replace the word node on the command line when executing your script.

Monitoring multiple directories

By default nodemon monitors the current working directory. If you want to take control of that option, use the --watch option to add specific paths:

Now nodemon will only restart if there are changes in the ./app or ./libs directory. By default nodemon will traverse sub-directories, so there's no need in explicitly including sub-directories.

Don't use unix globbing to pass multiple directories, e.g --watch ./lib/*, it won't work. You need a --watch flag per directory watched.

Specifying extension watch list

By default, nodemon looks for files with the .js, .mjs, .coffee, .litcoffee, and .json extensions. If you use the --exec option and monitor app.py nodemon will monitor files with the extension of .py. However, you can specify your own list with the -e (or --ext) switch like so:

Now nodemon will restart on any changes to files in the directory (or subdirectories) with the extensions .js, .pug.