github tutorial Youtube

Youtube Video:

https://www.youtube.com/watch?v=RGOj5yH7evk

Some terminology

git / version control = way to track code changes

repo = folder where the project is kept

git = tool that tracks the changes over time

githib = website where we keep all our repo

git commands

• clone -> bring a repo hosted somewhere (for instance on github) into a folder on your local machine
• add -> track your files and changes in git
• commit -> save your files in git
• push -> upload git to a remote repo (like github)
• pull -> download changes from remote repo to local machine

github repo

repo = project that contains all my files for a specific project

To create new repo:

Select: README, LICENSE, and .gitignore

(It is recommended that every repository include a README, LICENSE, and .gitignore)

About README.md

This is a file that describe what the project is about.

You can create the README.md file directly on github or you can create it locally.

create a new repository on the command line

echo "# demo-repo2" >> README.md

git init

git add README.md

git commit -m "first commit"

git branch -M main

git remote add origin https://github.com/cecilehannay/demo-repo2.git

git push -u origin main

push an existing repository from the command line

git remote add origin https://github.com/cecilehannay/demo-repo2.git

git branch -M main

git push -u origin main

Local repo

To clone locally:

git clone git@github.com:cecilehannay/github-tutorial.git

cd github-tutorial

The directory github-tutorial contains a file .git that contains all the changes recorded in the history of the repo.

Modify a file locally

Edit README.md

git status shows the files that haven't been saved yet in the local repo (it can be files that have been modified

modified:
or files that haven't been saved in the repo)

Untracked files:

git add .

stage the files with git and they are ready to be committed.

git commit -m "Modified the README.md on local repo" -m "Description of the change "

Now the changes is on the local repo

To push on the remote repo (github)

git push

Define ssh keys if needed

Generate a key locally

ssh-keygen -t rsa -b 4096 -C "hannay@ucar.edu"

+> this generates 2 keys private and public