SSH Key

If you have unlees two external repositories, you may want to have two easy ways to autenticate yourself using SSH-key.

First of all, check the folder .ssh located in your user folder (/home/user_name/.ssh).

$ ls ~/.ssh
id_rsa id_rsa.pub  known_hosts

You can create a ssh-key with the followin command.

$ ssh-keygen -t rsa -C "your_name@home_email.com"

Enter unique name, for example "id_rsa_home". Your passphrase can be empty.

Now, create a "config" file for organise these keys in that folder.

# old account
Host github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa

# new account
Host home.github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_home

Next you'll delete cached keys.

$ ssh-add -D

Then run the ssh-agent.

$ eval `ssh-agent -s`

Then, add yours key.

$ ssh-add ~/.ssh/id_rsa
$ ssh-add ~/.ssh/id_rsa_home

Then, list your keys.

$ ssh-add -l
2048 7a:32:06:3f:3d:6c:f4:a1:d4:65:13:64:a4:ed:1d:63 /home/user/.ssh/id_rsa (RSA)
2048 d4:e0:39:e1:bf:6f:e3:26:14:6b:26:73:4e:b4:53:83 /home/user/.ssh/id_rsa_home (RSA)

If you are conected in github, you can test the connection.

ssh -T git@home.github.com
Hi home_user! You've successfully authenticated, but GitHub does not provide shell access.

By the way. In yout github account in sentings you can find the way to add the key you created to your github account.

To copy the public key you can use

$ cat ~/.ssh/id_rsa_home.pub