How to generate and store read/write SSH keys

If you want to enable write-permissions to your checkout repo within a job, interact with other private repositories entirely, you'll need to add an SSH key to CircleCI which provides write read/write access. 

Check out our docs with with full instructions to generate and add the keys

See GitHub and Bitbucket documentation for guidelines on storing SSH public keys:

• https://developer.github.com/v3/guides/managing-deploy-keys
• https://confluence.atlassian.com/bitbucket/use-deployment-keys-294486051.html