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How to install npm using command prompt

npm update check failed │
│ Try running with sudo or get access │
│ to the local update config store via │
│ sudo chown -R $USER:$(id -gn $USER) C:\Users\Acg-Tech\.config
I am getting this issue in command prompt. i have tried these commands sudo npm i -g npm, npm i -g npm-upgrade, by running in command prompt but it's not working for me. How to resolve this issue.can anyone please help me.

I'm assuming you don't have it installed. (Even in the case you have it, it can be easily updated by this method).
If you have a Mac, install Brew and if you are on Windows, Chocolatey and then follow their respective commands to install/update npm. They will mostly take care of all the necessities to install/download anything.
The command will be mostly:
brew/chocolatey install npm

if this a windows system you need to run cmd with administrator rights and try it.

Download and install nodejs
Also add nodejs path and npm in roaming folder paths to env variables

REACT - not working npm while installing it

Did all the command on command line
from installing the npm globally npm install -g create-react-app along with following codes:
npx create-react-app <myprojectname>
and also cleared the npm cache but it always get stuck on the line in the image showing the following error. Along with the error:
┌──────────────────────────────────────────────────────────────────┐
│ npm update check failed │
│ Try running with sudo or get access │
│ to the local update config store via │
│ sudo chown -R $USER:$(id -gn $USER) C:\Users\Smart Sites\.config │
└──────────────────────────────────────────────────────────────────
along with 65 packages are looking for funding
[1]: https://i.stack.imgur.com/KJVVp.png

Here is what i found form the getting started page of create react app.
If you've previously installed create-react-app globally via
npm install -g create-react-app,
we recommend you uninstall the package using
npm uninstall -g create-react-app
to ensure that npx always uses the latest version.
npx create-react-app my-app
cd my-app
npm start
But always ensure that you have an existing folder before using npx.

Create React App Folders Not Being Installed Properly Upon using NPX

Running into this error below when using npx create-react-app
Husna#LAPTOP-LPCC954R MINGW64 ~/Desktop/React GitHib Project (master)
$ npx create-react-app github2020
Creating a new React app in C:\Users\Husna\Desktop\React GitHib Project\github2020.
Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts...
core-js#2.6.11 postinstall C:\Users\Husna\Desktop\React GitHib Project\github2020\node_modules\babel-runtime\node_modules\core-js
node -e "try{require('./postinstall')}catch(e){}"
core-js#3.6.5 postinstall C:\Users\Husna\Desktop\React GitHib Project\github2020\node_modules\core-js
node -e "try{require('./postinstall')}catch(e){}"
core-js-pure#3.6.5 postinstall C:\Users\Husna\Desktop\React GitHib Project\github2020\node_modules\core-js-pure
node -e "try{require('./postinstall')}catch(e){}"
+ react-dom#16.13.1
+ react-scripts#3.4.1
+ react#16.13.1
added 1601 packages from 751 contributors and audited 1605 packages in 869.821s
59 packages are looking for funding
run `npm fund` for details
found 4981 low severity vulnerabilities
run `npm audit fix` to fix them, or `npm audit` for details
A template was not provided. This is likely because you're using an outdated version of create-react-app.
Please note that global installs of create-react-app are no longer supported.

In my case, npx sometimes create issues for me to if you have already install yarn then try to create your react app through it.
In case you don't have yarn already.
you can install yarn through npm i -g yarn
and then you can just create your react app directly without using npx
create-react-app github2020

sh: 1: concurrent: not found while npm start

I am trying to setup angular2 on my local machine, I installed node and npm, after installing npm when I do 'npm start' I am getting below error
root#sameer-Vostro-2520:/home/sameer/angular2/angular-2-beta-boilerplate# npm start
> angular2-boilerplate#1.0.0 start /home/sameer/angular2/angular-2-beta-boilerplate
> concurrent "npm run gulp" "npm run lite"
sh: 1: concurrent: not found
npm ERR! weird error 127
npm WARN This failure might be due to the use of legacy binary "node"
npm WARN For further explanations, please read
/usr/share/doc/nodejs/README.Debian
npm ERR! not ok code 0
How can we fix this?
installed concurrent but again same error
concurrently#2.2.0 /root/.node/lib/node_modules/concurrently
├── commander#2.6.0
├── bluebird#2.9.6
├── cross-spawn#0.2.9 (lru-cache#2.7.3)
├── moment#2.14.1
├── rx#2.3.24
├── lodash#4.13.1
└── chalk#0.5.1 (supports-color#0.2.0, escape-string-regexp#1.0.5, ansi-styles#1.1.0, strip-ansi#0.3.0, has-ansi#0.1.0)
> angular2-boilerplate#1.0.0 start /home/sameer/angular2/angular-2-beta-boilerplate
> concurrent "npm run gulp" "npm run lite"
/usr/bin/env: node: No such file or directory
npm ERR! weird error 127
npm WARN This failure might be due to the use of legacy binary "node"
npm WARN For further explanations, please read
/usr/share/doc/nodejs/README.Debian
npm ERR! not ok code 0

This issue got fixed after installing nodejs-legacy
apt-get install nodejs-legacy

First run yarn and then npm start again

Someone who is having difficult running command in your package json file and getting error like
[0] /bin/sh: xxx: command not found
[1] /bin/sh: xxx: command not found
Solution -
Note You are running npm commands via npm so your command should use
npm:
Example -
if you got, following npm command
start, build, lint
You will have concurrently command like this
"scripts: {
"start": "ng start",
"build": "ng build",
"lint": "ng lint"
"run:all": "concurrently npm:start npm:build npm:lint"
}
See in above script usage of npm:

Travis CI Build Keeps Failing

I have a project that I am trying to incorporate Travis CI into for testing.
For the life of me, Travis CI keeps 'failing' when I do a Pull Request and/or push to my repos on GitHub.
Here is my .travis.yml file:
language: node_js
node_js:
- "node"
before_script:
-npm install -g webpack
-npm install -g mocha
-npm install -g chai
-npm start
- export DISPLAY=:99.0
- sh -e /etc/init.d/xvfb start
Here is the message from Travis CI about the error:
Using worker: worker-linux-docker-f87d2e7f.prod.travis-ci.org:travis-linux-7
system_info
Build system information
Build language: node_js
Build group: stable
Build dist: precise
Build image provisioning date and time
Thu Feb 5 15:09:33 UTC 2015
Operating System Details
Distributor ID: Ubuntu
Description: Ubuntu 12.04.5 LTS
Release: 12.04
Codename: precise
Linux Version
3.13.0-29-generic
Cookbooks Version
a68419e https://github.com/travis-ci/travis-cookbooks/tree/a68419e
GCC version
gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
LLVM version
clang version 3.4 (tags/RELEASE_34/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Pre-installed Ruby versions
ruby-1.9.3-p551
Pre-installed Node.js versions
v0.10.36
Pre-installed Go versions
1.4.1
Redis version
redis-server 2.8.19
riak version
2.0.2
MongoDB version
MongoDB 2.4.12
CouchDB version
couchdb 1.6.1
Neo4j version
1.9.4
RabbitMQ Version
3.4.3
ElasticSearch version
1.4.0
Installed Sphinx versions
2.0.10
2.1.9
2.2.6
Default Sphinx version
2.2.6
Installed Firefox version
firefox 31.0esr
PhantomJS version
1.9.8
ant -version
Apache Ant(TM) version 1.8.2 compiled on December 3 2011
mvn -version
Apache Maven 3.2.5 (12a6b3acb947671f09b81f49094c53f426d8cea1; 2014-12-14T17:29:23+00:00)
Maven home: /usr/local/maven
Java version: 1.7.0_76, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-oracle/jre
Default locale: en_US, platform encoding: ANSI_X3.4-1968
OS name: "linux", version: "3.13.0-29-generic", arch: "amd64", family: "unix"
fix.CVE-2015-7547
$ export DEBIAN_FRONTEND=noninteractive
W: Size of file /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_multiverse_source_Sources.gz is not what the server reported 5886 5888
W: Size of file /var/lib/apt/lists/ppa.launchpad.net_ubuntugis_ppa_ubuntu_dists_precise_main_binary-amd64_Packages.gz is not what the server reported 36669 36677
W: Size of file /var/lib/apt/lists/ppa.launchpad.net_ubuntugis_ppa_ubuntu_dists_precise_main_binary-i386_Packages.gz is not what the server reported 36729 36733
Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
libc-bin libc-dev-bin libc6-dev
Suggested packages:
glibc-doc
The following packages will be upgraded:
libc-bin libc-dev-bin libc6 libc6-dev
4 upgraded, 0 newly installed, 0 to remove and 221 not upgraded.
Need to get 8,844 kB of archives.
After this operation, 9,216 B disk space will be freed.
Get:1 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main libc6-dev amd64 2.15-0ubuntu10.13 [2,943 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main libc-dev-bin amd64 2.15-0ubuntu10.13 [84.7 kB]
Get:3 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main libc-bin amd64 2.15-0ubuntu10.13 [1,179 kB]
Get:4 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main libc6 amd64 2.15-0ubuntu10.13 [4,637 kB]
Fetched 8,844 kB in 0s (31.7 MB/s)
Preconfiguring packages ...
(Reading database ... 69991 files and directories currently installed.)
Preparing to replace libc6-dev 2.15-0ubuntu10.10 (using .../libc6-dev_2.15-0ubuntu10.13_amd64.deb) ...
Unpacking replacement libc6-dev ...
Preparing to replace libc-dev-bin 2.15-0ubuntu10.10 (using .../libc-dev-bin_2.15-0ubuntu10.13_amd64.deb) ...
Unpacking replacement libc-dev-bin ...
Preparing to replace libc-bin 2.15-0ubuntu10.10 (using .../libc-bin_2.15-0ubuntu10.13_amd64.deb) ...
Unpacking replacement libc-bin ...
Processing triggers for man-db ...
Setting up libc-bin (2.15-0ubuntu10.13) ...
(Reading database ... 69991 files and directories currently installed.)
Preparing to replace libc6 2.15-0ubuntu10.10 (using .../libc6_2.15-0ubuntu10.13_amd64.deb) ...
Unpacking replacement libc6 ...
Setting up libc6 (2.15-0ubuntu10.13) ...
Setting up libc-dev-bin (2.15-0ubuntu10.13) ...
Setting up libc6-dev (2.15-0ubuntu10.13) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
git.checkout
0.46s$ git clone --depth=50 --branch=master https://github.com/NAME/mood.ly.git NAME/mood.ly
Cloning into 'NAME/mood.ly'...
remote: Counting objects: 1183, done.
remote: Compressing objects: 100% (507/507), done.
remote: Total 1183 (delta 616), reused 1170 (delta 608), pack-reused 0
Receiving objects: 100% (1183/1183), 665.78 KiB | 0 bytes/s, done.
Resolving deltas: 100% (616/616), done.
Checking connectivity... done.
$ cd NAME/mood.ly
$ git checkout -qf 6bb7813f901f8d3cca359f8a9a1124df4dda86fe
This job is running on container-based infrastructure, which does not allow use of 'sudo', setuid and setguid executables.
If you require sudo, add 'sudo: required' to your .travis.yml
See https://docs.travis-ci.com/user/workers/container-based-infrastructure/ for details.
Updating nvm to v0.31.0
2.25s$ nvm install node
Downloading https://nodejs.org/dist/v6.1.0/node-v6.1.0-linux-x64.tar.xz...
######################################################################## 100.0%
Now using node v6.1.0 (npm v3.8.6)
$ node --version
v6.1.0
$ npm --version
3.8.6
$ nvm --version
0.31.0
install
47.43s$ npm install
npm WARN deprecated jade#0.26.3: Jade has been renamed to pug, please install the latest version of pug instead of jade
npm WARN deprecated graceful-fs#2.0.3: graceful-fs v3.0.0 and before will fail on node releases >= v7.0. Please update to graceful-fs#^4.0.0 as soon as possible. Use 'npm ls graceful-fs' to find it in the tree.
npm WARN excluding symbolic link index.js -> lib/sass.js
npm WARN excluding symbolic link lib/index.js -> sass.js
mood.ly#1.0.0 /home/travis/build/NAME/mood.ly
├─┬ babel-cli#6.8.0
│ ├─┬ babel-polyfill#6.8.0
│ │ └── babel-regenerator-runtime#6.5.0
│ ├── babel-runtime#6.6.1
│ ├─┬ bin-version-check#2.1.0
│ │ ├─┬ bin-version#1.0.4
***A BUNCH OF OTHER DEPENDENCIES* (it goes over 30K characters so I had to redact it)**
npm WARN optional Skipping failed optional dependency /chokidar/fsevents:
npm WARN notsup Not compatible with your operating system or architecture: fsevents#1.0.12
0.00s$ -npm install -g webpack -npm install -g mocha -npm install -g chai -npm run build-server - export DISPLAY=:99.0 - sh -e /etc/init.d/xvfb start
/home/travis/build.sh: line 45: eval: -n: invalid option
eval: usage: eval [arg ...]
The command "-npm install -g webpack -npm install -g mocha -npm install -g chai -npm run build-server - export DISPLAY=:99.0 - sh -e /etc/init.d/xvfb start" failed and exited with 2 during .
Your build has been stopped.
Would really appreciate some help/advice with this.
Thanks in advance.

The command "-npm install -g webpack -npm install -g mocha -npm install -g chai -npm run build-server - export DISPLAY=:99.0 - sh -e /etc/init.d/xvfb start" failed and exited with 2 during .
This line should be the hint. Your npm has a dash before it (i.e: -npm). Add a space between the - and npm in your configuration.
before_script:
- npm install -g webpack
- npm install -g mocha
- npm install -g chai
- npm start
- export DISPLAY=:99.0
- sh -e /etc/init.d/xvfb start