In this woalk through I am going to use GitHub.  However, the steps are similar to a Bitbucket profile.  Logged in to your GitHub account, click your profile icon, located (at the time of this writing) on the top right corner.  Select Settings Click SSH and GPG Keys Click Add New SHH KeyA new page will open  requiring Title Key Type a title that represents the project you are working on. Open your terminal application and enter the command ls -al ~/.sshThe period...

As a process I apply patches locally first, then using git upload the update(s) to a development site on the server.  Once the testing has been completed, the final step to apply the patch to the production site.   Using Terminal or your preferred shell program, navigate to the correct directory.  Then run this command using the name of the patch file (example.patch): patch < example.patchHowever, if you are patching Drupal core then remember to patch from the root directory...