How to Updating Github repository with changes from local project

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1- Updates files in the working tree to match the version in the index or the specified tree.

$ git checkout 

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2- Adds the files in the local repository and stages them for commit.

$ git add .

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3- Commits the tracked changes and prepares them to be pushed to a remote repository.

$ git commit -m "add your commit"

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4- Pushes the changes in your local repository up to the remote repository

$ git push origin master

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