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Git setup cheatsheet

Generating & adding SSH key

Generate SSH key
ssh-keygen -t ed25519 -C "email@domain.com"
Start ssh-agent if necessary
eval "$(ssh-agent -s)"
Add SSH key to ssh-agent
ssh-add ~/.ssh/id_ed25519
Copy echoed SSH public key
cat ~/.ssh/id_ed25519.pub
Add to github account
https://github.com/settings/keys

Generating & adding GPG key

Generate GPG key
gpg --full-generate-key
List secret keys and copy the key ID
gpg --list-secret-keys --keyid-format=long sec 4096R/3AA5C34371567BD2 2016-03-10 [expires: 2017-03-10]
Export then copy GPG key ID
gpg --armor --export 3AA5C34371567BD2 > gpg.key
Add to github account
https://github.com/settings/keys
Tell git about the GPG key

Migrate existing GPG key

Export public key into public.key
gpg --export -a $KEY_UID > public.key
Export private key into public.key
gpg --export-secret-key -a $KEY_UID > private.key
Modify encoding if needed
Import public key
gpg --import public.key
Import private key
gpg --import private.key
Tell git about the GPG key

Add GPG key to Git CLI

List secret keys and copy the key ID
gpg --list-secret-keys --keyid-format=long sec 4096R/3AA5C34371567BD2 2016-03-10 [expires: 2017-03-10]
Set GPG signing key in Git
git config --global user.signingkey 3AA5C34371567BD2
To sign commits by default
git config --global commit.gpgsign true