Git Basics for beginners

  • [Create git repo] > git init

  • [see what happened your git] > git status

  • [add to track or update tracked files]

[for all unstaged files]

git add .

[for specified files]

git add .\example.txt
  • [.gitignore file] (dont add unwanted files to repo, create .gitignore file) >
[inside of .gitignore file]
folder/unwantedNote.txt
itsWholeFolder/

# ignore all .a files
*.a

# but do track lib.a, even though you're ignoring .a files above
!lib.a

# only ignore the TODO file in the current directory, not subdir/TODO
/TODO

# ignore all files in any directory named build
build/

# ignore doc/notes.txt, but not doc/server/arch.txt
doc/*.txt

# ignore all .pdf files in the doc/ directory and any of its subdirectories
doc/**/*.pdf

source of above infos if your add and commited before unwanted files, should be remove cached files

Basic create new branch and switch to the new branch

[Create and Switch branch] > git checkout -b new_branch

this command shortcut of these

[Create Branch] > git branch new_branch

[Switch Branch] > git checkout new_branch

soruce : https://git-scm.com/book/en/v2/Git-Branching-Basic-Branching-and-Merging

Case : “new_branch” minor changes add to the main branch

  • make sure right branch, git status
  • make new changes “new_branch”
  • add changes to the “new_branch” > git add .
  • commit changes > git commit -m "new_branch : x changed to y"

Change the target branch, this case is ‘main’ branch

[switch branch] > git checkout main

[merge branch] > git merge new_branch

changes added main branch congrats!

Case : Remove Cached Files

  • for file
git rm --cached singlefile.txt
  • for folder
git rm --cached -r .\hunderedTinyFiles\

Case : Rename a folder

git mv "Old_folderName" "New_FolderName"

And need to be commit new change.

Case : Undo Added & Uncommited Files

For Reproduction

  • git add testFile
  • Oh i forgot something in this file
  • git reset testFile
  • Tada! Undo is Successfuly!