Linux+ git

Working directory

Where all program files are created, modified, and reviewed.

Staging area

Also called the index, its located on the same system and the working directory. Register files to the staging area with git add.

There is a hidden subdirectory, .git that is created with git init. When you add a file to the staging area, git creates or updates the file information in .git/index. This includes checksums, timestamps, and filenames.

git compresses the file and stores the compressed file as an object (blob) in .git/objects/. If it is a modified file that is already tracked, git stores the modifications as a new object so that there are versions of each iteration.

Local repo

Project tree and commit information (git commit) is stored in .git/objects/. A commit is also called a snapshot.

Remote repo

Same as local repo, but in a different location (cloud, on-site server, etc).

git setup

# view config with CLI
git config --list
user.name=linuxuser
user.email=linuxuser@example.com
core.repositoryformatversion=0
core.filemode=true
core.bare=false
core.logallrefupdates=true

# view global config
cat /home/linuxuser/.gitconfig 
[user]
	name = linuxuser
	email = linuxuser@example.com

# view local config
cat .git/config 
[core]
	repositoryformatversion = 0
	filemode = true
	bare = false
	logallrefupdates = true

.git

# .git contents
ls .git
branches        config       HEAD   index  logs     packed-refs
COMMIT_EDITMSG  description  hooks  info   objects  refs

# view last commit msg 
cat .git/COMMIT_EDITMSG 
linux file in git