Posting a new repo to github

Jotting some quick notes on how to properly push up local files and get it synced with github.com because I'm starting to do it fairly frequently and it takes me some time...

1. Adding an existing project to github using the command-line
2. When the upload fails it says,"

git push origin masterWarning: Permanently added the RSA host key for IP address '192.30.X.X' to the list of known hosts.Permission denied (publickey).fatal: Could not read from remote repository.

Please make sure you have the correct access rightsand the repository exists."

3. generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent
4. adding-a-new-ssh-key-to-your-github-account
5. I messed up by creating a readme, and so now it gave me this error:

$ git push origin masterTo git@github.com:nickswimsfast/SpatialPerception.git ! [rejected]        master -> master (fetch first)error: failed to push some refs to 'git@github.com:nickswimsfast/SpatialPerception.git'hint: Updates were rejected because the remote contains work that you dohint: not have locally. This is usually caused by another repository pushinghint: to the same ref. You may want to first integrate the remote changeshint: (e.g., 'git pull ...') before pushing again.hint: See the 'Note about fast-forwards' in 'git push --help' for details.

The solution (but rough and risky solution) was to:

git push origin master --force

6. create-a-gitignore