3 steps:
- Create multi ssh key
- Add config key
- Change host to using the right key

Step 1: generate ssh key. Ex:

ssh-keygen -t rsa -f ~/.ssh/ducmb_ducnn01 -C “ducnn01@gmail.com"
ssh-keygen -t rsa -f ~/.ssh/ducmb_ngocducdev -C "ngocducdev@gmail.com"

Add the public key to each account.

Step 2: map keys with hosts on .ssh/config file.

Host home.projects
  User git
  Hostname gitlab.com
  PreferredAuthentications publickey
  IdentitiesOnly yes
  IdentityFile ~/.ssh/ducmb_ducnn01

Host work.projects
  User git
  Hostname bitbucket.org
  PreferredAuthentications publickey
  IdentitiesOnly yes
  IdentityFile ~/.ssh/ducmb_ngocducdev

Step 3: Change the host name on the remote url:

ssh://git@hostname:<user_name>/<repo_name>.git

Ex:
git clone git@gitlab.com:ducnn01/rider.git       —> git clone git@home.projects:ducnn01/rider.git
git clone git@bitbucket.org:ngocducdev/rider.git  —> git clone git@work.projects:ngocducdev/rider.git



// ———————————————————
$ cd ~/.ssh

Create Default key if it doesn't exist
$ ssh-keygen -t rsa
$ ssh-add ~/.ssh/id_rsa

Creating other keys
$ ssh-keygen -t rsa -C "companyName" -f "companyName"
$ ssh-add ~/.ssh/companyName

Create SSH Config

Host personal.project
  Hostname bitbucket.org
  User <personal_username>
  IdentityFile ~/.ssh/id_rsa
Host work.project
  Hostname bitbucket.org
  User <work_username>
  IdentityFile ~/.ssh/<other_key>


Set up Git remote origin for multiple accounts

Set up a remote origin with your personal account as you normally would:
$ git remote add origin ssh://git@personal.project:<user_name>/<repo_name>.git

Set up your work account using the Host alias
$ git remote add origin ssh://git@<alias>:<user_name>/<repo_name>.git


Example:
$ git remote add origin ssh://git@work.project/<user_name>/<repo_name>.git