I’ve been trying to use npx on Windows for a while now and everytime I got the following error:

TypeError: Cannot read property 'get' of undefined
    at errorHandler (C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\utils\error-handler.js:213:18)
    at C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\bin\npm-cli.js:83:20            
    at cb (C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\npm.js:215:22)
    at C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\npm.js:253:24
    at C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\config\core.js:81:7         
    at Array.forEach (<anonymous>)
    at C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\config\core.js:80:13        
    at f (C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\node_modules\once\once.js:25:25)
    at afterExtras (C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\config\core.js:178:20)
    at C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\node_modules\mkdirp\index.js:47:53
C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\utils\error-handler.js:213
if (npm.config.get('json')) {
                 ^

TypeError: Cannot read property 'get' of undefined
    at process.errorHandler (C:\Users\User Name\scoop\persist\nodejs\bin\node_modules\npx\node_modules\npm\lib\utils\error-handler.js:213:18)
    at process.emit (events.js:210:5)
    at process._fatalException (internal/process/execution.js:150:25)
Install for [ 'package@latest' ] failed with code 7

Or some other variation of it, I think the error was that my User’s $HOME directory contained whitespace so to fixed it I had to set the cache and prefix keys in npm config, here’s how it can be fixed.

First, if you don’t already know where the npm cache and prefix directories are you can retrieve them using

npm config list -l

The output should look like the following:

Find the following keys: cache, prefix and userconfig, userconfig should be your .npmrc file edit or create it using your favorite editor and add the cache and prefix to it, replacing your username directory with the short version for me that would be USERNA~1.

To get the short name you can use this powershell command (replace $home with the directories you get).

(New-Object -ComObject Scripting.FileSystemObject).GetFolder("$home").ShortPath

If this doesn’t work try the other methods in this question.

Then add them to your .npmrc file, the final result should look something like:

cache = "C:\\Users\\USERNA~1\\scoop\\persist\\nodejs\\cache"
prefix = "C:\\Users\\USERNA~1\\scoop\\persist\\nodejs\\bin"

That’s all FOLKS~1

Postfix is a Message Transfer Agent implementation, basically an email server to send and recieve emails, and since PHP doesn’t include an SMTP implementation it needs an external server to do that if you plan on using the internal mail function.

While it is not encouraged to install and use your own email server, you might need one for testing purposes or in situations where you have to use PHP’s internal mail function, so here is how I installed Postfix on Ubuntu and set it up to send emails using PHP’s mail function.

First you’ll install postfix using the following command:

sudo apt-get install postfix

It will prompt you to enter a FQDN which is your top domain name e.g. example.org, It’s well explained in the installation process so it shouldn’t be a problem.