Git commit signature
In case you need sign your commit - a verified signature on GitHub commit history. Here it is. I have already added my GPG key to GitHub.
# Check GPU key
$ gpg --list-secret-keys --keyid-format=long
/home/rajesh/.gnupg/pubring.kbx
-------------------------------
sec rsa2048/DD95F119EA64BABE 2011-02-11 [SCA]
79B36A390B6A4BBFA103483BDD95F119EA64BABE
# Tell Git about your signing key
$ git config --global user.signingkey DD95F119EA64BABE
# Instruct to sign every commit
$ git config --global commit.gpgsign true
# Add to startup of terminal
$ [ -f ~/.bashrc ] && echo -e '\nexport GPG_TTY=$(tty)' >> ~/.bashrc