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Angular CLI installation error in ubunu - I have get an error when I am trying to run angular CLI command in my ubuntu machine

This error I have got.
I am already install node js and npm in my system.
I also have remove npm cache.
npm ERR! code EACCES
npm ERR! syscall access
npm ERR! path /usr/local/lib/node_modules
npm ERR! errno -13
npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR! { Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR! stack: 'Error: EACCES: permission denied, access \'/usr/local/lib/node_modules\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path: '/usr/local/lib/node_modules' }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/user/.npm/_logs/2020-11-03T18_21_04_293Z-debug.log
~~~

Don't use sudo for this problem. Use sudo the way it is intended to be used in Ubuntu: for each command that requires it, no more. Don't use sudo to run a command unless it needs to be root. For example, most users would only need sudo for installing things.
Have you try, manually change npm's default directory?
mkdir ~/.npm-global
npm config set prefix '~/.npm-global'
export PATH=~/.npm-global/bin:$PATH
source ~/.profile
To test your new configuration, install a package globally without using sudo:
npm install -g #angular/cli

permissions issue when trying to update npm

I tried to update to the latest version of npm and got this error? Anyone ever have a permission error with npm before? I'm stuck as to how to fix it.
marshalls-MacBook-Air:Desktop marshall$ npm install npm#latest -g
npm WARN checkPermissions Missing write access to /usr/local/Cellar/node/11.9.0/lib/node_modules
npm ERR! path /usr/local/Cellar/node/11.9.0/lib/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/local/Cellar/node/11.9.0/lib/node_modules'
npm ERR! { [Error: EACCES: permission denied, access '/usr/local/Cellar/node/11.9.0/lib/node_modules']
npm ERR! stack:
npm ERR! 'Error: EACCES: permission denied, access \'/usr/local/Cellar/node/11.9.0/lib/node_modules\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path: '/usr/local/Cellar/node/11.9.0/lib/node_modules' }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator (though this is not recommended).
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/marshall/.npm/_logs/2019-09-24T17_21_36_708Z-debug.log

you need permission :
sudo npm install npm#latest -g
then put your password

nodemon package is not install in nodejs [duplicate]

This question already has answers here:
How to fix npm throwing error without sudo
(39 answers)
Closed 3 years ago.
nodemon package does not successfully install using nodejs. I used npm install -g nodmon. I received the permissions-related error below.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#1.2.9 (node_modules/nodemon/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm ERR! path ../lib/node_modules/nodemon/bin/nodemon.js
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall symlink
npm ERR! Error: EACCES: permission denied, symlink '../lib/node_modules/nodemon/bin/nodemon.js' -> '/usr/bin/nodemon'
npm ERR! { [Error: EACCES: permission denied, symlink '../lib/node_modules/nodemon/bin/nodemon.js' -> '/usr/bin/nodemon']
npm ERR! cause:
npm ERR! { Error: EACCES: permission denied, symlink '../lib/node_modules/nodemon/bin/nodemon.js' -> '/usr/bin/nodemon'
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'symlink',
npm ERR! path: '../lib/node_modules/nodemon/bin/nodemon.js',
npm ERR! dest: '/usr/bin/nodemon' },
npm ERR! stack:
npm ERR! 'Error: EACCES: permission denied, symlink \'../lib/node_modules/nodemon/bin/nodemon.js\' -> \'/usr/bin/nodemon\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'symlink',
npm ERR! path: '../lib/node_modules/nodemon/bin/nodemon.js',
npm ERR! dest: '/usr/bin/nodemon' }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator (though this is not recommended).
npm ERR! A complete log of this run can be found in:
npm ERR! /home/etech7/.npm/_logs/2019-07-02T11_31_52_856Z-debug.log

Try to install it with sudo. It it because you need admin permissions.
sudo npm install -g nodemon
Hope it helps!

This is a permissions issue, as indicated by the error message. You need to fix your permissions or use sudo. Please see: npm throws error without sudo

I'm trying to update my magic mirror using npm, using the following command in terminal: npm install -g npm

pi#raspberrypi:~ $ npm install -g npm
npm WARN checkPermissions Missing write access to /usr/lib/node_modules/npm
npm WARN checkPermissions Missing write access to /usr/lib/node_modules
npm ERR! path /usr/lib/node_modules/npm
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/lib/node_modules/npm'
npm ERR! { [Error: EACCES: permission denied, access '/usr/lib/node_modules/npm']
npm ERR! stack:
npm ERR! 'Error: EACCES: permission denied, access \'/usr/lib/node_modules/npm\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path: '/usr/lib/node_modules/npm' }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator (though this is not recommended).
npm ERR! A complete log of this run can be found in:
npm ERR! /home/pi/.npm/_logs/2019-01-13T02_13_34_227Z-debug.log
pi#raspberrypi:~ $

sudo npm install -g npm
Sudo is the key here. May the force be with you.

npm start gives Error: `output.path` needs to be an absolute path or `/`

When i run my first react app using npm start command some error is displayed. Please some one help me to resolve this issue.­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:386
throw e;
^
Error: `output.path` needs to be an absolute path or `/`.
at Object.setFs (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-middleware\lib\Shared.js:88:11)
at Shared (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-middleware\lib\Shared.js:214:8)
at module.exports (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-middleware\middleware.js:22:15)
at new Server (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\lib\Server.js:56:20)
at startDevServer (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:379:12)
at processOptions (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:317:3)
at Object.<anonymous> (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:441:1)
at Module._compile (module.js:571:32)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
npm ERR! Windows_NT 6.2.9200
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v7.5.0
npm ERR! npm v4.1.2
npm ERR! code ELIFECYCLE
npm ERR! r3#1.0.0 start: `webpack-dev-server`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the r3#1.0.0 start script 'webpack-dev-server'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the r3 package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! webpack-dev-server
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs r3
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls r3
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\ankit\Desktop\r3\npm-debug.log

The error message is clear： output.path needs to be an absolute path or /
Your output.path should write like this：
var path = require('path');
output: {
path: path.join( __dirname, './dist/'),
}