Avoid typing the SSH passphrase on Ubuntu using ssh-agent

Here: https://unix.stackexchange.com/questions/12195/how-to-avoid-being-asked-passphrase-each-time-i-push-to-bitbucket

Two solutions:

Using ssh-agent

eval $(ssh-agent)
ssh-add

Using keychain (debian/ubuntu)

apt-get install keychain

Using ‘ForwardAgent yes’ in .ssh/config

Here: https://developer.github.com/v3/guides/using-ssh-agent-forwarding

If it doesn’t work at first, check that the key ~/.ssh/id_rsa is added to ssh-agent, i.e., ssh-add has been run. To avoid re-typing ‘ssh-add’ and password on every startup, run:

ssh-add -K id_rsa