you can find .git directory by $find -name *.git.
cd /.git directory/
Execute all the command at .git directory of project.
Q1. Edit a file and see it listed as changed file
A1. $ git status
Q2. See the line differences
A2. $ git diff
Q3. Stage the file
A3. $git add
Q4. Commit the files
A4. $git commit -m "your comment for Changes"
Q5. See it in the log
A5. $git log
Q6. Push the commit to the remote repo
A6. $git push