Node express command not found - node.js

i have used npm install -g express.
then used npm install -g express-generator
but when after install , i type express-V still told me :-bash: express: command not found.
please help me how to figure out this problem

You Say "Bash" that mean that you are running under linux or something similar. If a command could not be found from the system, it is not in in the Path environment variable. Check your NPM installation regarding environment variables. You need to include the global modules folder of npm in your Path.
Thanks for your answer.i reset the path environment and then it has been figured out.

Related

Node Modules not Found Even Environment is Configured

I am installing nodeJS v10 in Windows 10 Pro, After downloading the installer and install, I can run npm and npx to install the node modules but the installed global command cannot be found. I also try to use back npm install -g, but the error stays the same. Saying react-create-app, I can see it is being installed in the specified directory, but it always report command not found.
Command not found
npm config get prefix
Actual directory
Environment variable settings
User Variables
System Variables
As the environment variable seems setting up correctly, it is so weird for not finding the command. Any help would be appreciated, thank you very much

Angular - ng: command not found

I'm trying to learn Angular and my knowledge in terminal is beginner. After I installed Angular and then type ng new my-project. I get the response ng: command not found. I've seen other posts that had this problem and I've uninstalled and reinstalled npm and ng.
The last step I took was npm install -g #angular/cli#latest then ng new my-project.
Then I get ng: command not found.
Guess You are running on Windows
(To make #jowey's answer more straightforward).
Install Angular normally from your bash $ npm install -g #angular/cli#latest
Next is to rearrange the PATHS to
NPM
Nodejs
Angular CLI
in System Environment Variables, the picture below shows the arrangement.
I had that same problem and just solved it.
make sure you have node installed.
after running
npm i -g #angular/cli
when installation is finished, try re-opening your git bash or whatever you're using or open it in a new folder. boom. it worked for me
The error may occur if the NodeJs is installed incorrectly or not installed at all.
The proper way to fix that is to install/reinstall it the right way (check their official website for that), but if you're searching for a quick solution, you can try to install Angular CLI globally:
npm install -g #angular/cli
If it doesn't work and you are in a hurry, use sudo:
sudo npm install -g #angular/cli
Don't forget to reopen your terminal window.
For MacOS
Sometimes the ng command does not get established as a link in /usr/local/bin. I fixed the problem by adding it manually:
ln -s /usr/local/Cellar/node/10.10.0/lib/node_modules/angular-cli/bin/ng /usr/local/bin/ng
It may has not helped OP, but it solved my problem. This answer is to help others who have not tried the command mentioned in OP's question.
Just use npm install -g #angular/cli#latest. It did the trick for me.
If you have already installed #angular/cli
Then you only need to link it to npm using npm link #angular/cli
Otherwise first install angular by npm install #angular/cli and then link.
if you install npm correctly in this way:
npm install -g #angular/cli#latest
and still have that problem, it maybe because you run the command in shell and not in cmd (you need to run command in cmd), check this out and maybe it helps...
If you are working on Windows then do the following:
From this directory:
C:\Users\ [your username] \AppData\Roaming , delete NPM folder then install Angular using this command npm install -g #angular/cli
*Windows only*
The clue is to arrange the entries in the path variable right.
As the NPM wiki tells us:
Because the installer puts C:\Program Files (x86)\nodejs before C:\Users<username>\AppData\Roaming\npm on your PATH, it will always use version of npm installed with node instead of the version of npm you installed using npm -g install npm#.
So your path variable will look something like:
C:\<path-to-node-installation>;%appdata%\npm;
Now you have to possibilities:
Swap the two entries so it will look like
…;%appdata%\npm;C:\<path-to-node-installation>;…
This will load the npm version installed with npm (and not with node) and with it the installed Agnular CLI version.
If you (for whatever reason) like to use the npm version bundled with node, add the direct path to your global Angualr CLI version. After this your path variable should look like this:
…;C:\Users\<username>\AppData\Roaming\npm\node_modules\#angular\cli;C:\<path-to-node-installation>;%appdata%\npm;…
or
…;%appdata%\npm\node_modules\#angular\cli;C:\<path-to-node-installation>;%appdata%\npm;…
for the short form.
This worked for me since a while now.
Before wasting lots of time in installing and uninstalling, read this.
If you already installed angular before and found this issue, may be it is the reason that you installed angular before with running terminal as Administrator and now trying this command without administrator mode or vice versa. There is a difference in these two.
If you installed angular without administrator mode you can only use angular commands such as ng without administrator mode. Similarly,
If you installed angular with administrator mode you can use angular commands such as ng in administrator mode only.
100% working solution
1) rm -rf /usr/local/lib/node_modules
2)brew uninstall node
3)echo prefix=~/.npm-packages >> ~/.npmrc
4)brew install node
5) npm install -g #angular/cli
Finally and most importantly
6) export PATH="$HOME/.npm-packages/bin:$PATH"
Also if any editor still shown err than write
7) point over there .
100% working
Windows 10 Only
If you are using Git Bash and also you are sure that you have done all steps that are listed above, still getting an error like this, run following command:
alias ng="C:/Users/<your-username>/AppData/Roaming/npm/node_modules/#angular/cli/bin/ng"
then run ng -v
Finally, it works if you see the version of Angular-CLI
I had the same issue in Windows. I could solve it by running the ng command with npm
ng g c test
Error : C:\Users\user\AppData\Roaming\npm/node_modules/node/bin/node: line 1: This: command not found
Solution :
$ npm run ng g c test
Other solution worked for me to use Windows PowerShell or command prompt instead of bash shell
Most of the time developers install just Node.js and start working on development. This issue related angular cli dependency on your development environment.
You can fix this with command
npm install -g #angular/cli
First of all check by running
npm config get prefix
It should return some thing like (C:\Users\acer\AppData\Roaming\npm)
if it does not return it.
run npm config delete prefix
then run npm install -g #angular/cli#latest
And check by running ng --version
It has solved my problem. Hope it will help you.
**
if you have npm, install run the command
npm install -g #angular/cli
then bind your ng using this:
cd
alias ng=".npm-global/bin/ng"
Follow the Pictures for more help.
Removing NODE and using NVM instead fixed a lot of issues.
removing Node from your system
install NVM from here https://github.com/creationix/nvm
Install Node via NVM: nvm install
stable run npm install -g angular-cli
LINK
Step 1 : Delete "npm" folder from the following path
C:\Users\YourUserName\AppData\Roaming
Step 2 : Once you have the "npm" folder deleted, uninstall Node.Js.
Step 3 : Reinstall Node.JS
Step 4 : Install Angular CLI Using this command npm install -g #angular/cli#latest
Step 5: Now try : ng --version or ng -v
I had a lot of issues installing it on a mac with all the permission errors
Finally the following line solve the issue.
sudo npm i -g #angular/cli
>> npm uninstall -g angular-cli
>> npm uninstall -g #angular/cli
>> npm cache clean
Restart you machine
then >> npm install -g #angular/cli#latest
set Path : C:\Users\admin\AppData\Roaming\npm\node_modules#angular\cli
Hope you never get 'ng' not found
I tried this and everything worked by changing the npm directory.
mkdir ~/.npm-global
npm config set prefix '~/.npm-global'
export PATH=~/.npm-global/bin:$PATH
source ~/.profile
npm install -g jshint
ng --version
You can install npx to use Angular CLI installed in your directory:
npm install -g npx
npx ng serve
You must know the full path of your angular installation.
For example: C:\Users\\AppData\Roaming\npm\node_modules#angular\cli\bin\ng .
Type in cmd, powershell or bash
alias ng="C:\Users\<your username>\AppData\Roaming\npm\node_modules\#angular\cli\bin\ng"
In my case
OS Version: Ubuntu 18.04.4 LTS
Node version v12.16.0
Remove ng from /usr/local/bin by using below command.
sudo rm -r ng
After that, installed ng by using command mentioned below.
sudo npm install -g #angular/cli
For Linux user
$ alias ng="/home/jones/node_modules/#angular/cli/bin/ng"
then check angular/cli version
ng --version
enter image description here
alias ng="C:/Users/<user_name>/AppData/Roaming/npm/node_modules/#angular/cli/bin/ng".. This did work..
Happy Coding :)
I guess everyone figured this out years ago but me. simple ng stopped working when I updated node. I tried all the previous suggestions in this thread to no avail but this is my solution. the command npm ng works but darn it I want just ng to work. So
I created a bat filed named ng.bat with this content
npm ng %*
either put ng.bat in a directory recognized by path or add a new path in This Computer / Properties / Advanced System Settings / Environment Variables/ System Variables / Path . For instance I added C:\Shortcuts to path.
EDIT the above answer is not THE REAL SOLUTION. What npm need is to find the npm-cli.js which is located in the npm bin directory. If a path is not set to bin then not work. I just copied npm-cli.js and put it in the npm directoy which has a path set to it.
Windows oriented:
If you're chasing an "update node/angular and I wiped my AppData
folder and now the world hates me stream of errors", then this may help.
Clear out Environment Variable settings for Node/npm/#angular/cli (They don't help)
Install Node.JS/npm from https://nodejs.org/en/ (Remember where you install it)
Confirm the location npm is [currently] running from:
npm config get prefix
Realize that is not where you just install new/fresh Node.
Update npm global pointer (which is not an environment variable)
npm config set prefix "C:\Program Files\nodejs"
Reinstall Angular
npm install -g #angular/cli#latest
Check angular install
ng --version
Hopefully this helps someone. Sorry, you'll have to reinstall any other interesting packages.
I'll add this as "yet another option" which worked for me when none of the other options worked( on windows ).
You can run the angular binary via its full path name.
node C:\Users\user\node_modules#angular\cli\bin\ng.js --version
Oddly enough, adding these paths to my env didn't work...for some reason windows opened editor to edit ng.js file instead of running it.
For me the issue was something with node. Version was very wrong somehow.
Uninstalled node from "Add or remove programs" and then re-installed it using the file from their website.

'express' is not executable

This is quite basic. Many examples show terminal commands such as: 'express name-of-directory-to-be-created'. Yet on my system, though I've installed node.js (and command: node -v works, and npm -v works), command: express fails with: command not found Further investigation shows that, on my macbook air, all incidences of express.js are not executable. I believe express was installed using npm express or npm -g express. Please, what is going on? Are the examples correct? ( There are several, all from various sources. ) How may I execute
express directory
Thanks in advance.
This usually happens on windows.
You need to install express globally and the location where npm modules get installed should be added to PATH(environment variable).
To install express globally type npm install -g express
Also it looks like you are trying to use express-generator.If yes you should install it similarly.
npm install -g express-generator
In windows by default npm modules are installed at "C:\Users\u_name\AppData\Roaming\npm"
Edit your PATH environment variable and append your npm path at the end.

Npm global modules destination

Where is npm -g storing the global modules by default? I am running archlinux.
So if I want to modify a global module where will be the location of it?
I have installed a package globally without sudo and gave me the error with the path. :) So the default place where npm is installing packages globally is /usr/lib/node_modules Thanks guys for your help.

Can't USE any already installed npm packages: Not Recognized

I'm clearly having a misunderstanding about what PATH does. I'm having trouble using any of my installed packages (globally as well as local). What I've tried to do so far:
npm install -g firebase-tools
npm install -g ionic cordova
The packages install just fine. I can see that when I run
npm list -g --depth=0
I get a list that shows the node, cordova, firebase, and ionic packages installed. But, if i want to access any of these packages by running a command, such as
firebase-init
OR
ionic start myApp sidemenu
I get the same error message in my cmd
['firebase']/['ionic'] is not a recognized internal or external command, operable program or batch file.
Nodejs is installed in my Program Files(x86)/nodejs
Here is what i have my PATH variable set to:
C:\Program Files\nodejs;
C:\Program Files (x86)\nodejs\node_modules\npm;
C:\Users\...\myproject\node_modules
I added that last path after locally doing
npm install ionic
where I can clearly see the ionic package in the folder, but I still get the same error as above when I try to run an ionic command.
I'm really disheartened because I've not been able to figure out the issue for weeks now, and I can't get any progress on my project because of it. :(
Note: i'm working on WINDOWS 8
Solution 1: At the application directory, link the local project to the package
npm link firebase-tools
npm link ionic cordova
Solution 2: The problem may be caused by lacking of NODE_PATH definition
Check if NODE_PATH variable is defined in the environment:
echo %NODE_PATH% (for Windows)
echo $NODE_PATH (for Linux)
If not, define it:
setx NODE_PATH C:\Users\<Username>\AppData\Roaming\npm\node_modules (for Windows)
export NODE_PATH=/usr/lib/node_modules (for Linux)
Do you have git installed? Remove it and try out your commands. git causes trouble with paths in windows You can check this answer
#Alexsandra, i would recommmend to install the packages locally:
npm install --save firebase-tools
npm install --save ionic cordova
once installed,check in your project package.json to verify it has been added as one of your dependencies. then type firebase --help
hope that helps!

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