Setting your commit email address on GitHub
If you haven't enabled email address privacy, you can choose which verified email address to author changes with when you edit, delete, or create files or merge a pull request in the user interface. If you enabled email address privacy, then the commit author email address cannot be changed and will be a no-reply by default. For more information about the exact form the no-reply email address can take, see Email addresses reference.
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In the upper-right corner of any page on GitHub, click your profile picture, then click Settings.
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In the "Access" section of the sidebar, click Emails.
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In "Add email address", type your email address and click Add.
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In the "Primary email address" dropdown menu, select the email address you'd like to associate with your web-based Git operations.

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To keep your email address private when performing web-based Git operations, select Keep my email addresses private.
Setting your commit email address in Git
You can use the git config command to change the email address you associate with your Git commits. The new email address you set will be visible in any future commits you push to GitHub from the command line. Any commits you made prior to changing your commit email address are still associated with your previous email address.
Setting your email address for every repository on your computer
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Open TerminalTerminalGit Bash.