Kyle Doherty kylefdoherty

Docker Notes

Images

templates used to create containers that have no state and never change
created with the docker build command
composed of layers of other images
Ex:

docker run hello-world

Nginx Tutorial

Nginx is a webserver but also can act as a reverse proxy (sits in front of another server), a load balancer, or a load balancer. Read more here

Setup Nginx on Ubuntu

Spin up an Ubuntu machine with vagrant or create one on digitalocean or somewhere else.
sudo apt-get update & sudo apt-get install nginx
Visit server's IP to see if Nginx is running (you'll see the welcome page if it is)

if you aren't sure what your server's IP run ip addr show eth0 | grep inet | awk '{ print $2; }' | sed 's/\/.*$//'

Setup your /etc/nginx/nginx.conf.

How to Delete a Submodule

Run git rm --cached
Delete the relevant lines from the .gitmodules file.
Delete the relevant section from .git/config.
Commit
Delete the now untracked submodule files.
Remove directory .git/modules/

Iterm2 Shortcuts

Navigation

Lines

End of line Ctrl + e
Beginning of line Ctrl + a

Words

Note: For iTerm2 you need to configure the option key to behave correctly. Go to 'preferences', under 'profiles' and in the 'keys' tab you can specify either the right or left option keys to send +Esc.

Create a Server Instance

You can do this with a virtual box (ex: Vagrant & VirtualBox), an EC2 instance on AWS, a Droplet on Digital Ocean, and a variety of other ways/services.

Setup EC2 Instance

Launch EC2 instance on AWS (ubuntu 16.04 or something else)
Change the security group to only allow SHH from your IP
Name and download the keypair and move it to your ~/.ssh directory
SSH into your instance by navigating to connect and copy and pasting the SSH command given in the modal, ex: ssh -i "name_of_my_key_pair.pem" ubuntu@ec2-54-84-207-182.compute-1.amazonaws.com
You'll likely need to change the permission settings for that file. To do this you can use the command on the same modal where you got the SHH command. Ex:

How to Deploy a Rails App to DigitalOcean with Ubuntu 14.04, Phusion Passenger & Nginx, Postgres, and Capistrano

1. Setup DigitalOcean Droplet

Choose Server Image

Choose Size (if this is a hobby app you can probably get away with the smallest)

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