How to manage multiple accounts using SSH key in GitHub

Problem is, Bitbucket doesn’t allow you to use the same SSH key with more than one Bitbucket account.

About SSH key

Using the SSH protocol, you can connect and authenticate to remote servers and services. With SSH keys, you can connect to GitHub without supplying your username or password at each visit.

Generating a new SSH key

1. Open Git Bash.
2. Paste the text below, substituting in your GitHub/GitLab/Bitbucket email address.
3. ssh-keygen -t rsa -C “your_email@example.com”
4. When you’re prompted to “Enter a file in which to save the key,” press Enter. This accepts the
default file location.
5. Enter a file in which to save the key (/c/Users/you/.ssh/id_rsa):[Press enter]
6. At the prompt, type a secure passphrase/password.
7. Enter passphrase (empty for no passphrase): [Type a passphrase]
Enter same passphrase again: [Type passphrase again]
8. Go to C:\Users\\.ssh\id_rsa.pub
9. Copy All Content than Pest into (Go to bitbucket Setting -> Click on SSH Key -> Add New key)

Generating a Second SSH key

1. Open Git Bash.
2. Paste the text below, substituting in your GitHub/GitLab/Bitbucket email address.
3. ssh-keygen -t rsa -f ~/.ssh/ -C “your_email@example.com”
– Example : ssh-keygen -t rsa -f ~/.ssh/ -C “your_email@youremail.com”
4. When you’re prompted to “Enter a file in which to save the key,” press Enter. This accepts the
default file location.
5. Enter a file in which to save the key (/c/Users/you/.ssh/id_rsa):[Press enter]
6. At the prompt, type a secure passphrase/password for the second account. Plz remember this
password its user for Push and Pull Command.
7. Enter passphrase (empty for no passphrase): [Type a passphrase]
Enter same passphrase again: [Type passphrase again]
8. Go to C:\Users\\.ssh\.pub
9. Copy All Content than Pest into (Go to bitbucket Setting -> Click on SSH Key -> Add New key)

Create an SSH config file

When you have multiple identity files, consider creating an SSH config file to create aliases for your various identities. You can construct an SSH config file using many parameters and different approaches. The format for the alias entries used in this example is:
Host alias
containstbucket.org
IdentityFile ~/.ssh/config

To create a config file for two identities (worked and personalized), you would do the following:
1. Open a terminal window.
2. Edit the ~/.ssh/config file.
3. If you don’t have a config file, create one.
4. Add an alias for each identity combination for example:

1. To use multiple keys create a file at C:\Users\\.ssh\config with contents 
   similar to:
   Host bitbucket.org  User git
   Hostname bitbucket.org
   PreferredAuthentications publickey
   IdentityFile ~/.ssh/id_rsa

2. Host bitbucket-accountB
   Host bitbucket.org  User git
   Hostname bitbucket.org
   PreferredAuthentications publickey
   IdentityFile ~/.ssh/id_rsa

Example of Clone Repository using 2 different Accounts

With this set up I can clone with my default key as Bitbucket suggests:

Example :Git clone git@bitbucket.org:username/project.git
This below repository contains Second Git Account

Example:Git clone git@bitbucket.org:username/project_demo.git
Just change host bitbucket.org of second git repository URL :

Syntax:Git clone git@bitbucket_:username/project_demo.git

Example:Git clone git@bitbucket_accountB:username/project_demo.git

Impact of Other Git Command

Example :

git remote set-url origin git@<Default/other Account Host>:username/project_demo.git
git remote add origin git@<Default/other Account Host>:username/project_demo.git