Github Cheatsheet

Setting up a new github project between local and repote:

Setting up a new repo:

1. Install gh to programatically create remote repos.
2. Authenticate and create project.

# Install gh first: https://cli.github.com
gh auth login             
gh repo create my-project --public --source=. --push # This both creates the remote repo and pushes your local code.
 

Readding key on system restart:

# start a new ssh-agent for your terminal process:
eval "$(ssh-agent -s)"
 
# Add key file to SSH agent:
# This will need to be done per terminal session — i.e do it in the IDE environment you are working out of. 
ssh-add {KEY FILE}
 
# Check if authed:
ssh -T git@github.com

Pushing an existing local directory to remote:

Ensure you have an appropriate SSH key on your local device, that is also configured for the desired GitHub account’s access.

For example:

# To generate a new key:
ssh-keygen -t ed25519 -C "your_email@example.com"
 
 
# Setting up local private key: 
vim ~/.ssh/id_ed25519   # paste private key/secret here
chmod 600 ~/.ssh/id_ed25519
 
# Configure public key in GitHub — taking the cat contents:
cat ~/.ssh/id_ed25519.pub # public key in same repo
 
 

Then, you can test Github auth:

ssh -T git@github.com
 
# If you have alternative hosts, use those hostnames instead. e.g: 
ssh -T git@github-work  
 
 
# Successful output looks like:
# "Hi USERNAME! You've successfully authenticated, but GitHub does not provide shell access."
 

Once auth is configured, then create a new repo with the same name as the local directory. Once this is complete, you can add it as the remote repo:

• These steps are also provided by github on repo creation.

git remote add origin git@github.com:USERNAME/REPO_NAME.git
git branch -M main   # ensures main is the branch name
git push -u origin main
 

Cheatsheet:

Getting & Creating Projects

Command	Description
git init	Initialize a local Git repository
git clone ssh://git@github.com/[username]/[repository-name].git	Create a local copy of a remote repository

Basic Snapshotting

Command	Description
git status	Check status
git add [file-name.txt]	Add a file to the staging area
git add -A	Add all new and changed files to the staging area
git commit -m "[commit message]"	Commit changes
git rm -r [file-name.txt]	Remove a file (or folder)

Branching & Merginggi

Command	Description
git branch	List branches (the asterisk denotes the current branch)
git branch -a	List all branches (local and remote)
git branch [branch name]	Create a new branch
git branch -d [branch name]	Delete a branch
git push origin --delete [branch name]	Delete a remote branch
git checkout -b [branch name]	Create a new branch and switch to it
git checkout -b [branch name] origin/[branch name]	Clone a remote branch and switch to it
git branch -m [old branch name] [new branch name]	Rename a local branch
git checkout [branch name]	Switch to a branch
git checkout -	Switch to the branch last checked out
git checkout -- [file-name.txt]	Discard changes to a file
git merge [branch name]	Merge a branch into the active branch
git merge [source branch] [target branch]	Merge a branch into a target branch
git stash	Stash changes in a dirty working directory
git stash clear	Remove all stashed entries

Sharing & Updating Projects

Command	Description
git push origin [branch name]	Push a branch to your remote repository
git push -u origin [branch name]	Push changes to remote repository (and remember the branch)
git push	Push changes to remote repository (remembered branch)
git push origin --delete [branch name]	Delete a remote branch
git pull	Update local repository to the newest commit
git pull origin [branch name]	Pull changes from remote repository
git remote add origin ssh://git@github.com/[username]/[repository-name].git	Add a remote repository
git remote set-url origin ssh://git@github.com/[username]/[repository-name].git	Set a repository’s origin branch to SSH

Inspection & Comparison

Command	Description
git log	View changes
git log --summary	View changes (detailed)
git log --oneline	View changes (briefly)
git diff [source branch] [target branch]	Preview changes before merging

credit: https://github.com/joshnh/Git-Commands/blob/master/README.md