Signing commits

• https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits

git config commit.gpgsign true
git config --global commit.gpgsign true

git config --global user.signingkey XXXX

Related

• Generating a new GPG key
• git commit -S

Related

• git commit [ -a | -an | --amend | --amend --reset-author | --no-verify | -m | -S ]
• git config, .git/config, ~/.gitconfig, --list, --global, Usage: git config, credential.helper