sAdd a submodule

git submodule add <repository-to-submodule> <path/name>

Convert a directory under Git management into a submodule

git mv bar bar.bk
git add -A
git add submodule <repository-to-submodule> bar

Update submodules

git submodule update

Remove a submodule

git submodule deinit -f <submodule-name>
git rm -f <submodule-name>
rm -rf .git/modules/<submodule-name>

When git status shows (modified content), here’s how to handle it:

1. Commit changes inside the submodule

• Navigate into the submodule directory
• git add
• git commit

2. Push to the submodule’s master branch

• git push origin master

3. Check the diff

• git diff

4. Commit the updated submodule reference in the parent project

• git add
• git commit