In this article, we will see how to setup passwordless authentication for git push in GitHub. If you are using GitHub hosting service to keep and manage your project source code then you might have noticed that during every git push, it will ask you to provide user name and password to authenticate. As a user, you might find this pretty inconvenient as for every small changes also you need to authenticate to push your code. Well, the best solution to get rid of this is by creating a passwordless authentication where it won't ask you to provide your credentials again and again. This is very easy setup and can be quickly done in few steps as discussed below.
How to Setup Passwordless Authentication for git push in GitHub
Step 1: Prerequisites
a) You should have a valid GitHub Account.
b) You should have access to the repository.
c) You should have access to add new SSH Key.
Step 2: Login to GitHub
You need to first open the GitHub login page in your favorite browser and then provide the credentials to login to your account as shown below.
Step 3: Create SSH Key Pair
For creating a passwordless authentication, you need to first generate a public-private key pair using ssh-keygen command as shown below.
cyberithub@ubuntu:~$ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/home/cyberithub/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/cyberithub/.ssh/id_rsa Your public key has been saved in /home/cyberithub/.ssh/id_rsa.pub The key fingerprint is: SHA256:bKYwAK0zKiHZRnZj+t8WoVVkrNCFJyH0hkdY64rGlIc cyberithub@ubuntu The key's randomart image is: +---[RSA 3072]----+ | o.oo=. . | | . + +oo.. . | | ..= ...++.o . | |..*oo. *+oo + | |.B.o. ..S. E o | |. = . +. + o | | . o .o o | | . . ... | | ... | +----[SHA256]-----+
Step 4: Setup Passwordless Authentication
Once the key pair is generated, you need to go to
Settings from top right corner as shown below.
Then click on
SSH and GPG Keys under
Access section from the left side column.
Here click on
New SSH Key from SSH keys to add a new key.
Provide the key title, type and the key contents. In the key content section, you need to paste the contents from
~/.ssh/id_rsa.pub location in the system where you have generated your key pairs. Then click on
Add SSH Key.
You can see that the key will be added as shown below.
Step 5: Configure Git
In local Git configuration, first you need to configure remote origin URL by using below
git config command. So the command syntax would be
git config remote.origin.url git+ssh://email@example.com/<user_id>/<repo_id>.git. You can do the necessary changes in this syntax and and then run accordingly.
fatal: not in a git directoryerror.
cyberithub@ubuntu:~/atlantis-example$ git config remote.origin.url git+ssh://firstname.lastname@example.org/cyberithub/atlantis-example.git
Then verify the configuration using
git config -l command as shown below.
cyberithub@ubuntu:~/atlantis-example$ git config -l email@example.com user.name=CyberITHub User core.repositoryformatversion=0 core.filemode=true core.bare=false core.logallrefupdates=true remote.origin.url=git+ssh://firstname.lastname@example.org/cyberithub/atlantis-example.git remote.origin.fetch=+refs/heads/*:refs/remotes/origin/* branch.master.remote=origin branch.master.merge=refs/heads/master
In the next step, add your generated private key as
~/.ssh/config as shown below.
cyberithub@ubuntu:~/atlantis-example$ nano ~/.ssh/config IdentityFile ~/.ssh/id_rsa
After adding the file, test the configuration by using
ssh -T email@example.com command as shown below.
cyberithub@ubuntu:~/atlantis-example$ ssh -T firstname.lastname@example.org Hi cyberithub! You've successfully authenticated, but GitHub does not provide shell access.
Now you can try to push the changes after adding and committing the files and then see if the passwordless authentication is working.
cyberithub@ubuntu:~/atlantis-example$ git push -u origin master Enumerating objects: 8, done. Counting objects: 100% (8/8), done. Compressing objects: 100% (6/6), done. Writing objects: 100% (6/6), 650 bytes | 216.00 KiB/s, done. Total 6 (delta 1), reused 0 (delta 0) remote: Resolving deltas: 100% (1/1), done. To git+ssh://github.com/cyberithub/atlantis-example.git eb904c2..4f32267 master -> master Branch 'master' set up to track remote branch 'master' from 'origin'.
From the above output, we can see that passwordless authentication is working now as it is not asking for username and password.