Lecture 5 Notes
Part 1: Setup
Go ahead and launch an EC2 instance and SSH onto it by following the instructions here.
Make to open up SSH and HTTP to all addresses.
Part 2: Checking Hardware
SSH onto your new instance:
$ ssh -i your-ssh-key.pem ubuntu@your-ip-address
Inspect the CPU/memory:
$ sudo lshw
Inspect the disk storage:
Part 3: Running a Basic Web Server
Create a simple HTML file:
$ mdkir web && cd web $ echo "Hello World! From <your name>" > index.html
$ vim index.html
Now run a Python HTTP server on port 80:
$ sudo python3 -m http.server 80
Navigate to your IP address via your browser.
Attempt to navigate to my website via the IP address on the board.
Part 4: Experimenting with Security Groups
Edit your security group to limit HTTP access to just your IP address.
You can double check that it matches your IP address by googling "What's my IP address".
Can you access your neighbors site?
Attempt to navigate to my website via the IP address on the board. Does it still work?
Part 5: Long Running Tasks
You can use the
& to run commands in the background:
$ ping 188.8.131.52 &
$ sudo python3 -m http.server 80 &
However, if you exit your shell then those commands stop.
We can keep commands alive (aka ignore the shutdown signals) by using
$ nohup sudo python3 -m http.server 80 &
If you exit, your server will continue to run!
Part 6: Second Web Server
Let's run a second server on the same EC2 instance.
Create a new folder
api in the home directory:
$ mkdir ~/api && cd ~/api
Create a different HTML file in that folder and run a web server on port 8000.
$ python3 -m http.server 8000
What happens when you navigate to
http://<your ip address>:8000? How do you fix this?