Installation

Install Git

Windows

Linux

Initial setting

Set committer

git config --global user.email <Your e-mail address>
git config --global user.name <Your name>

Generate GPG key

1. Install GPG command

    apt-get install gnupg
   

   On Windows, need to execute this command in bash.

2. Generate GPG key-pair

    gpg --full-generate-key
   

3. Select key type or press Enter key

4. Input key size

   Key size is to need to set 4096 bit.

5. Enter the length of time the key should be valid.
6. Verify that your selections are correct.

7. Enter your user ID information

   When asked to enter your email address, ensure that you enter the verified email address for your GitHub account

8. Type a secure passphrase.

9. Copy GPG key id

   In this example, copy 3AA5C34371567BD2.

    gpg --list-secret-keys --keyid-format LON
    /Users/hubot/.gnupg/secring.gpg
    ------------------------------------
    sec   4096R/3AA5C34371567BD2 2016-03-10 [expires: 2017-03-10]
    uid                          Hubot 
    ssb   4096R/42B317FD4BA89E7A 2016-03-10
   

10. To set GPG signing key in Git

    git config --global user.signingkey 3AA5C34371567BD2
    

11. Add profile

    if [ -r ~/.bash_profile ]; then echo 'export GPG_TTY=$(tty)' >> ~/.bash_profile; \
    else echo 'export GPG_TTY=$(tty)' >> ~/.profile; fi
    

12. Register GPG key to GitHub

    Detail information is to see GitHub Docs

13. Set always gpg signing

    git config --global commit.gpgsign true
    

Next to First step