Angular CLI v6.0.8 won't install - node.js

Question

I've installed NodeJS via PPA on Ubuntu 18.04. However when running sudo npm install -g #angular/cli I get the error at the bottom of this post.
I am using node v10.6.0 and npm v6.1.0. I have tried these commands, with no luck:
A) sudo npm install -g #angular/cli#latest
B) npm install -g #angular/cli (no sudo)
C) sudo npm install -g angular-cli --unsafe-perm=true
One thing I noticed was that in case C it actually installs and works when running as sudo. But it doesn't work as a regular user ("bash: ng: command not found").
I have checked my PATH env variable and have confirmed that the result of npm bin -g (/usb/bin) is indeed in my PATH for all users.
Any help would be very much appreciated.
me#laptop:~$ sudo npm install -g #angular/cli
[sudo] password for me:
/usr/bin/ng -> /usr/lib/node_modules/#angular/cli/bin/ng
> #angular/cli#6.0.8 postinstall /usr/lib/node_modules/#angular/cli
> node ./bin/ng-update-message.js
internal/modules/cjs/loader.js:583
throw err;
^
Error: Cannot find module '/usr/lib/node_modules/#angular/cli/bin/ng-update-message.js'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
at Function.Module._load (internal/modules/cjs/loader.js:507:25)
at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
at startup (internal/bootstrap/node.js:236:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:560:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! #angular/cli#6.0.8 postinstall: `node ./bin/ng-update-message.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the #angular/cli#6.0.8 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

Answer 1

FOUND IT! After much digging around I realized this was a permissions issue. A system-wide umask in the PAM module (Ubuntu) was set to create files and folders with more restrictive permissions than usual. This is what I did to get back to normal and get Angular CLI installed:
sudo vi /etc/pam.d/common-session
Then change this line: session optional pam_umask.so umask=077
To this: session optional pam_umask.so
Reboot, then: sudo npm install -g #angular/cli
Et Voilà!