Git fatal: remote origin already exists

One of my colleagues was facing an issue with git, trying to add a remote to the git repo.

➜  repo_name git:(master) git remote add origin git@github.com:username/repo_name.git
fatal: remote origin already exists.

As the error message indicates, there is already a remote configured with the name origin. So you can either add the new remote with a different name say github or update the existing one if you don't need it:

To add a new remote with an alternate name, called for example github instead of origin (which obviously already exists in your system), do the following:

$ git remote add github git@github.com:username/repo_name.git

Alternatively, you can update the existing remote origin using the following command:

$ git remote set-url origin git@github.com:username/repo_name.git

If you want to list the current remotes, you can check the same using

git remote -v