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Terms {#terms}

  • repository (repo) - is a parent folder that is using version control
  • untracked file(s) - a file that git is not tracking changes for
  • tracked file(s) - a file that git is tracking any changes for
  • staging area - storage area for what will go into your next commit
  • stage/unstage - to add or remove something from the staging area
  • commit - a timestamped set of changes with an explanatory message
  • diff - a set of changes between one state and another, like the last commit and your current directory (git diff) or between one commit and another (git show <hash>)
  • log - the historical list of commits
  • commit hash - the unique identifier created with each commit
  • HEAD - the alias and pointer to the most recent commit's hash on this branch
  • master - the default first branch of a repo
  • branch - a separate direction for commits, independent of your main branch, but with the ability to be added into your main branch later.
  • merge - combining the changes of one branch into another
  • merge conflict - the result when a merge doesn't resolve flawlessly. This usually happens when both branches edited the same line with different text. Git asks the user to pick which is the correct text.
  • remote - an external location of your repo that can be used for backup and collaboration
  • origin - the default first remote location of a repo
  • fork - a cloned remote copy, created from the original owner's repo. Best used when you do not have edit/push privileges on the original repo.
  • pull request/merge request - a request created on the remote website (like GitHub) asking that changes you have made to your branch be merged into the main branch of the project.

Commands {#command_summary}

  • git config - used for adding/changing git configurations, such as your name or email that is used on commits
  • git init - command to add git tracking to your directory
  • git status - show the status of any untracked, unstaged, and staged in the repository. Also displays the current branch name.
  • git add <file_or_path> [...] - add file(s) to the staging area in preparation for committing
  • git commit -m "<commit_msg">
  • git diff - shows the changes in your working directory compared to your most recent commit
  • git log - shows your commit history
    • git log --decorate - shows your commit history, including pointers like HEAD, branches, and remote brances
  • git show <hash> - shows the diff of a specific commit, the changes that saved in that commit
  • git reset
    • git reset HEAD <file_or_path> [...] - removes file(s) from the staging area, but keeps the changes in your working directory.
    • git reset <hash> - rollback your history to the specified commit. Removes all commits that came after it, bur preserves the changes in your working directory.
  • git checkout
    • git checkout <hash> - jump to a point in your history, but does not alter your history. This is a 'detached HEAD' state
    • git checkout -- <file> - clear the changes of a tracked file from your working directory
    • git checkout <branch> - change to that branch and able to make changes to that branch's history
  • git branch - list all branches, with * designating the current branch
    • git branch <new_branch> - create a new branch using your current branch as a starting point
    • git branch -m <old_name> <new_name> - rename a branch
    • git branch -d <branch_to_delete> - delete a branch that you are not currently in
  • git merge <branch> - add the commits of specified branch into your current one
  • git remote - shows a list of your remote location aliases. The default is origin
    • git remote -v - shows the list of your remote location aliases and their clone urls
    • git remote add <remote_alias> <remote_url> - adds a remote location to your repo
  • git clone <remote_url> <new_local_folder> - copies a project from the remote_url to the specified local folder
  • git fetch - grabs all remote branches and changes, but does not merge them in
  • git pull <remote> <remote_branch> - does a fetch of changes, then merges them into your current branch
  • git push <remote> <branch> - pushes changes from your current branch to the remote
  • git mv <old_file> <new_file> - both renames/moves the file and tells git to link the history of the old file to the new
  • git rm <file> - both deletes the file and tells git to stop tracking it.