$ git config --global user.name "name"
$ git config --global user.email "email"
# mac
$ brew install gpg
# brew install gpg2
$ git config --global gpg.program gpg
$ gpg full-generate-key
# input your username
# input your email
# select maximum or size your gpg key
# recomended 2048 or 4086
$ gpg --list-secret-keys --keyid-format LONG
///// Output example copy XXXXXXXXXXXX
/Users/rin/.gnupg/pubring.kbx
-----------------------------
sec rsa4096/XXXXXXXXXXXXX 2018-12-16 [SC]
x0x0x0x0x0x0xx00x0xx00x0x0x0x0x0x0x0x0
uid xyxyxyxyxyxyxyxyx 2018-12-16 [E]
$ git config --global user.signingkey XXXXXXXXXXX
$ gpg --armor --export xxxxxxxxxxxxx
# example output & copy all output
-----BEGIN PGP PUBLIC KEY BLOCK-----
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-----END PGP PUBLIC KEY BLOCK-----
# paste in your github.com -> settings SSH & GPG
# for test
$ echo "test" | gpg --clearsign
# if Output
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
test
gpg: signing failed: Inappropriate ioctl for device
gpg: [stdin]: clear-sign failed: Inappropriate ioctl for device
#
$ echo "export GPG_TTY=$(tty)" >> .zshrc # .bashrc or .profile
# finally go to directory project
# git add
# git commit -S -m "Secure Committing"
# git push origin master
# check your github commit as verified (y) :D
# Happy All The Time
