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Installation instructions

August 27th, 2021 by PostPcEra

This page details Installation instructions for various technology stacks.

Tech Stacks

Node.js, JavaScript , TypeScript

 Next.js

 NESTJs

Node.js version upgrade

# first intall n
$ npm install -g n


# see where it it insalled 
$ which n    # /usr/local/bin/n




# To see a list of your downloaded Node.js versions, run n on its own:
# from the menu, you can delete any old versions .
$ n 


# to download and update to your desired Node.js version, execute the following:
$ n <version-number>


# You can specify to update to the newest LTS version by running:
$ n lts


$ n 16.13.2

Python

  • Python Virtual Environments: A Prime
$ python3 -m venv venv_name           # <venv_name> can be any name for a folder

$ source venv_name/bin/activate
(venv_name) $                         # Notice how your prompt is now prefixed with the name of your environment  

(venv_name) $ deactivate              # you go back to the “system” context


$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:

$ source venv_name/bin/activate
(venv_name) $ echo $PATH          # our virtual environment’s bin directory is now at the beginning of the path. 
/Users/valuec/python-virtual-environments/venv_name/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:

Postgres DB

$ sudo -i -u postgres psql 
postgres=# \du
postgres=# \q

postgres=# create database dvdrental;
postgres=# \c dvdrentalDB     # connect to dvdrentalDB

dvdrentalDB=# select count(*) from film;                 # prompt change to Database name

Prisma ORM

  • Python Virtual Environments: A Prime