multiple_ssh_key.txt

# to create SSH key, you do this
# https://help.github.com/articles/generating-ssh-keys/
#
# assuming,
# john.doe@gmail.com is your personal email and
# john.doe@sym.ph is your company email

# $ ssh-keygen -t rsa -b 4096 -C "john.doe@gmail.com"
# create another SSH key for specific company following the above command
$ ssh-keygen -t rsa -f -b 4096 ~/.ssh/id_rsa_symph -C "john.doe@sym.ph"

# add SSH key to ssh-agent
$ ssh-add ~/.ssh/id_rsa_symph

# add SSH key to your other account
$ pbcopy < ~/.ssh/id_rsa_symph.pub

# create config file ~/.ssh/config
Host bitbucket.org
  User git
  Hostname bitbucket.org
  PreferredAuthentications publickey
  IdentityFile ~/.ssh/id_rsa

Host bitbucket-symph
  User git
  Hostname bitbucket.org
  PreferredAuthentications publickey
  IdentitiesOnly yes
  IdentityFile ~/.ssh/id_rsa_symph
  
# test the connection
$ ssh -T git@bitbucket-symph
  
# by default, you clone a project like this
$ git clone git@bitbucket.org:username/project.git

# clone using second bitbucket account
$ git clone git@bitbucket-symph:username/project.git

# http://dbushell.com/2013/01/27/multiple-accounts-and-ssh-keys/