Error : getaddrinfo ENOTFOUND registry.npmjs.org registry.npmjs.org:443

Things to try:

1. make sure you have internet connection: ping 8.8.8.8
2. make sure you have DNS resolver working: ping www.google.com
3. make sure you can access registry.npmjs.org: ping registry.npmjs.org
4. make sure you can connect via https.

Try in your browser: https://registry.npmjs.org/

Make sure you are trying to connect to:

• registry.npmjs.org

and not to:

• "registry.npmjs.org registry.npmjs.org:443"

or some other weird string composed of few hostnames, because it's weird that the resolver complains about a hostnames that includes a port number, which it shouldn't care about. Ok, I tested and it should look like this for hosts that are not found.

Update

From your comment to this answer it seems that you are not directly connected to the internet if you can't even ping 8.8.8.8.

If you are using a proxy to access the Web, then you also have to configure npm to use it. Use:

npm config set proxy http://example.com:8080
npm config set https-proxy http://example.com:8080

but instead of http://example.com:8080 use what you actually need in your company - ask someone or see how your browser is configured.

To see your proxy configuration in Chrome, see this.

Update 2

If you can access https://registry.npmjs.org/ in your browser but you cannot run ping registry.npmjs.org then it means that your browser must be configured to use a proxy, or other programs than your browser must be restricted from using the internet.

In any case, you should ask someone in your company about it because most likely you either need to use a specific proxy or someone needs to lift the restriction from your npm and allow it to access the network.

The network access can be blocked by a firewall installed on your computer or a router in your network. It's hard to say without knowing the specific configuration in your company.

Update 3

Remove the environment variable "https_proxy" if any or use correct value for "https_proxy"

use: https://registry.npmjs.org/ Make sure you are trying to connect to:

registry.npmjs.org

if there is no error,try to clear cache

npm cache clean --force

then try

npm install

even you have any error

npm config set registry https://registry.npmjs.org/

then try

npm install -g @angular/cli

First, edit NetworkManager.conf file:

vim /etc/NetworkManager/NetworkManager.conf

Comment this line:

#dns=dnsmasq

Finally

sudo service network-manager restart
sudo service docker restart