# 1. Генерируем пару ключей

ssh-keygen -t rsa -f ~/.ssh/id_rsa.bitbucket
ssh-keygen -t rsa -f ~/.ssh/id_rsa.git

# 2. Передаем в ssh-agent информацию о ключах

ssh-add ~/.ssh/id_rsa.bitbucket
ssh-add ~/.ssh/id_rsa.git

# 3. Создаем файл конфигурации ssh-подключений

vim ~/.ssh/config

# Host bitbucket.org
#  User git
#  Hostname bitbucket.org
#  PreferredAuthentications publickey
#  IdentitiesOnly yes
#  IdentityFile ~/.ssh/id_rsa.bitbucket

# Host github.com
#  User git
#  Hostname github.com
#  PreferredAuthentications publickey
#  IdentitiesOnly yes
#  IdentityFile ~/.ssh/id_rsa.git