Git

.git

HEAD

The HEAD file points to current branch,

$ cat .git/HEAD
ref: refs/heads/main

The file refs/heads/main point to the commit of current branch,

$ cat .git/refs/heads/main
f4e147fd5c627e985edb05059c9924e8f492311c

Config

The git config file is located at .git/config in a repo, or ~/.gitconfig globally.

Local configuration files take precedence over global configuration files.

Object

Objects type

• tree
• commit
• blob

# check object type
git cat-file -t 0a2bc7
# check object content
git cat-file -p 0a2bc7
# check object size
git cat-file -s 0a2bc7

Working directory & Stating area

# check stating area files
git ls-files -s

Git File Status

• untracked
• modified
• staged
• unmodified

FAQs

Get to get last commit file change summary

git diff-tree --numstat HEAD HEAD~1
git diff-tree --stat HEAD HEAD~1