ThingsILearned

Just an area where I put things I learned

March 17, 2022

AWS Lambda Functions Importing Packages

In AWS Lambda, soemtimes I get "Unable to import module 'lambda_function': No module named 'xpress'" error message. This is just because the default Lambda doesn't have the dependency required.

I needed pandas and numpy. I used this tutorial to get me through it. https://www.youtube.com/watch?v=1UDEp90S9h8

Now I need to have xpress installed. I am looking up "Python xpress wheel files" and will upload it as a layer to my function (just like we did with pandas in youtube video above).

August 12, 2021

Installing Homebrew on MacOS

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

August 11, 2021

My First Docker File

FROM ubuntu:12.04
# Install dependencies
RUN apt-get update -y
RUN apt-get install -y apache2

# Install apache and write hello world message
RUN echo "Helloo Cloud Gurus!!!! This web page is running in a Docker container!" > /var/www/index.html


# Configure apache
RUN a2enmod rewrite
RUN chown -R www-data:www-data /var/www
ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2

EXPOSE 80

CMD ["/usr/sbin/apache2", "-D",  "FOREGROUND"]

July 21, 2021

UserData for Mock EC2 Linux Instance

#!/bin/bash

########################################
##### USE THIS WITH AMAZON LINUX 2 #####
########################################

# get admin privileges
sudo su

# install httpd (Linux 2 version)
yum update -y
yum install -y httpd.x86_64
systemctl start httpd.service
systemctl enable httpd.service
echo "Hello World from $(hostname -f)" > /var/www/html/index.html

Create SSH Key for GitHub

In Mac install git
Set username git config --global user.name "willsower"
Set email git config --global user.email "jatr812@gmail.com
Create SSH Key ssh-keygen -t rsa -C "jatr812@gmail.com". Follow necessary steps for generation
Copy the SSH key pbcopy < ~/.ssh/id_rsa.pub
Go into GitHub and go to AccountSettings -> SSH Keys -> Add SSH Key
Add label, paste the public key in the big text box
To test, run ssh -T git@github.com

June 24, 2021

Delete branches

// delete branch locally
git branch -d localBranchName

// delete branch remotely
git push origin --delete remoteBranchName

April 20, 2021

SSH into WWU Machines + Using SCP to copy files from virtual machine to personal machine

ssh -p 922 ${username}@linux.cs.wwu.edu to ssh into school machines

scp -P 922 ${username}@linux.cs.wwu.edu:~/document.txt ~/Documents/ to copy files from my VM to my personal Documents directory on my local machine.

For my sake, grabbing LaTeX files I use scp -P 922 rosej25@linux.cs.wwu.edu:/projects/49x/tex2speech/texFiles/computer.tex ~/Documents/ command

This is for me to get to my tex2speech logs scp -P 922 rosej25@linux.cs.wwu.edu:~/CSCI/Tex2Speech/latex2speech/tex2speech/log.log ~/Documents/

April 7, 2021

Uploading Flask App to Elastic Beanstalk

After creating a virtual environment, and having my requirements in requirements.txt. My folder structure should look something similiar: project/ venv app.py requirements.txt

If you run python3 app.py it should run locally

Before proceding, make sure you have the AWS CLI pip3 install awscli then download the elastic beanstalk CLI pip3 install awsebcli If you type aws in the terminal you can see the AWS CLI was downloaded successfully, along if you type eb in the terminal you can see that that was downloaded successfully too.

In the command line, to create an elastic beanstalk application run eb init -p python-3.6 projectName --region us-east-1

Now to setup the configuration type eb init which will prompt you to add a keypair so that you can connect to your EC2 instance through SSH. If you ever need to change this information in the future run eb init -i

Create an environment and deploy the application with eb create flask-env command, this could take about 5 minutes to create all the resources.

To open your application run eb open

If you ever need to completely delete everything on elastic beanstalk run eb terminate flask-env

if you ever need to redeploy your code to the same application run eb deploy in the repository

April 2, 2021

An easier virtual environment to use is pipenv

To create a shell

pipenv shell

To download dependencies in PipFile (similiar to requirements.txt)

pipenv install

Sometimes when running pipenv shell it doesn't know where Python3.6 is. To find this, type python or python3 in terminal

Type import sys then enter
Type print(sys.executable) to get the path. Copy the path and get out of python interpreter

In regular terminal type pipenv --python <path_to_python>

April 1, 2021

To setup a temporary virtual environment the following commands are

python3 -m venv env
source env/bin/activate

This creates a env/ folder so in .gitignore be sure to add env/

After creating the environment, if you want to add installed libraries to the requirements.txt file run the following command

python3 -m pip freeze > requirements.txt

To download all items in your requirements.txt file run the following command

pip install -r requirements.txt

March 31, 2021

To create a Next.JS project write this command in your terminal npx create-next-app nextjs-blog --use-npm --example "https://github.com/vercel/next-learn-starter/tree/master/learn-starter" for a basic layout. You need to have node.js installed

March 25, 2021

To create your own server in the directory you use the command python3 -m http.server you can then access this server on your local laptop by going to localhost:8000.

To access this on a phone or another computer that is on the same network, you would get your IP address, and in a browser would be <IPAddress>:8000 where the port is 8000.

March 20, 2021

I have learned about SMTP gateway and IMAP gateway. SMTP is Simple Mail Transfer Protocol allowing you to receive messages. While IMAP is Internet Message Access Protocol allowing us to get the email. I wrote a script to get user's emails here. This github project which I'm working on with Muhammad allows us to send and recieve messages from text with an email. Click here
In Discord you can do "`` Put your code here

``" To get different colors of your code to render.

March 18, 2021

Learned a lot about Django architecture with overall project and app folders. Refer to this document written by Muhammad link
Learned how to add React App and some components inside of a Django Rest Framework

cd into main folder
Create new app django-admin startapp frontend
cd into frontend folder
Inside of frontend folder, create templates directory and static directory
In templates directory create folders css, js, and images
Inside of your frontend folder create directory src then add directory components into src
Inside of the frontend directory, create a node project npm init -y
Install webpack npm i webpack webpack cli --save-dev This package will take all our javascript and bundle it in one single js file
Install bable npm i @babel/core babel-loader @babel/preset-env @babel/preset-react --save-dev Essentially what babel does is it takes our JavaScript and code and makes sure it is compatable with other browsers.
Install react npm i react react-dom --save-dev
Install materialUI npm install @material-ui/core built in components for us so we don't have to build everything (cards/grids) like boostrap
Install another plugin for babel npm install @babel/plugin-proposal-class-properties this is so we can use async, wait, etc commands in our JavaScript
Install plugin for react npm install react-router-dom will let us to re route our pages
Install plugin for materialUI npm install @material-ui/icons Get icons for material ui

March 17, 2021

Created Django project with subapp.

Start django project (after django has been downloaded and pipenv has started) django-admin.py startproject termtext
cd termtext
Create app python3 manage.py startapp termtext_frontend
To run the server ./manage.py runserver
We want to use DB - SQLite, so we want to create the migrations ./manage.py migrate
To create a super user for the app run ./manage.py createsuperuser which allows me to create admin user name / password
Running the server again ./manage.py runserver I can put /admin in the URL and sign in with my super user credentials

March 16, 2021

Create an environment in terminal by using export, for example if I wanted to create an environment variable called email and set it, I would do the following command.

export EMAIL=myemail@gmail.com

To read the variable I could do

echo $EMAIL

I also made this in the bash mini shell, but I forgot how to do it myself haha

willsower / ThingsILearned