github gpg

# make a key
gpg --full-generate-key
 # make it > 4096
gpg --list-secret-keys --keyid-format LONG 
 # key id is numbers on asc line after /
gpg --armor --export <key id>
 # add to github
 
git config --global user.signingkey <key id>

# export keys
gpg --export-secret-keys -a keyid > my_private_key.asc
gpg --export -a keyid > my_public_key.asc

# import keys
gpg --import my_private_key.asc
gpg --import my_public_key.asc