git install

sudo apt-get install git

git config

git config --global user.email benoit.works@gmail.com
git config --global user.name ben
cat .gitconfig 
[user]
    email = benoit.works@gmail.com
    name = ben

ssh keys

github key

ben@debian:~$ ssh-keygen -t rsa -C "benoit.works@gmail.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/home/ben/.ssh/id_rsa): /home/ben/.ssh/id_rsa_github
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/ben/.ssh/id_rsa_github.
Your public key has been saved in /home/ben/.ssh/id_rsa_github.pub.
The key fingerprint is:
e0:ff:69:e3:fd:67:9b:97:7e:3b:d7:0c:5e:c8:98:94 benoit.works@gmail.com
The key's randomart image is:
+---[RSA 2048]----+
|                 |
|                 |
|      .      .   |
|     . .    E    |
|      . S  . + . |
|       .    o + .|
|        .    . +o|
|         .oo  .oX|
|         o+...oBB|
+-----------------+
ben@debian:~$ ls -al .ssh/
total 16
drwx------  2 ben ben 4096 juin   7 10:01 .
drwxr-xr-x 21 ben ben 4096 juin   7 10:00 ..
-rw-------  1 ben ben 1675 juin   7 10:01 id_rsa_github
-rw-r--r--  1 ben ben  404 juin   7 10:01 id_rsa_github.pub


ben@debian:~$ ssh-add ~/.ssh/id_rsa_github
Identity added: /home/ben/.ssh/id_rsa_github (rsa w/o comment)

Add the public key to your github account.

bitbucket key

ben@debian ~ $ ssh-keygen -t rsa -C "benoit.works@gmail.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/home/ben/.ssh/id_rsa): /home/ben/.ssh/id_rsa_bitbucket
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/ben/.ssh/id_rsa_bitbucket.
Your public key has been saved in /home/ben/.ssh/id_rsa_bitbucket.pub.
The key fingerprint is:
04:75:ba:a3:71:a4:1e:3e:0a:31:f8:a1:b3:70:57:81 benoit.works@gmail.com
The key's randomart image is:
+---[RSA 2048]----+
|      ... .      |
|     . . o       |
|    E . +        |
| .     = .       |
|. +   = S        |
| o + + = .       |
|+ + . =          |
|.+ o . .         |
|.   .            |
+-----------------+

ben@debian ~ $ ssh-add ~/.ssh/id_rsa_bitbucket
Identity added: /home/ben/.ssh/id_rsa_bitbucket (rsa w/o comment)

Add the public key to your bitbucket account.

ssh config file

Edit ~/.ssh/config file

# Default GitHub user
Host github.com
 HostName github.com
 PreferredAuthentications publickey
 IdentityFile ~/.ssh/id_rsa_github

# bitbucket account
Host bitbucket.org
 HostName bitbucket.org
 PreferredAuthentications publickey
 IdentityFile ~/.ssh/id_rsa_bitbucket