jenkins/hudson can't connect to github repo

I am on Ec2 with the base amazon ami linux- I have installed jenkins but when I go to pull the repo from github I am given the following error:

Building in workspace /var/lib/jenkins/workspace/build social
Checkout:build social / /var/lib/jenkins/workspace/build social - hudson.remoting.LocalChannel@5c7b21b
Using strategy: Default
Cloning the remote Git repository
Cloning repository origin
ERROR: Error cloning remote repo 'origin' : Could not clone git@github.com:adulion/.git
hudson.plugins.git.GitException: Could not clone git@github.com:adulion/.git
    at hudson.plugins.git.GitAPI.clone(GitAPI.java:245)
    at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1117)
    at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1059)
    at hudson.FilePath.act(FilePath.java:832)
    at hudson.FilePath.act(FilePath.java:814)
    at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1059)
    at hudson.model.AbstractProject.checkout(AbstractProject.java:1218)
    at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:581)
    at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:470)
    at hudson.model.Run.run(Run.java:1421)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
    at hudson.model.ResourceController.execute(ResourceController.java:88)
    at hudson.model.Executor.run(Executor.java:238)
Caused by: hudson.plugins.git.GitException: Command "git clone --progress -o origin git@github.com:adulion/.git /var/lib/jenkins/workspace/build social" returned status code 128:
stdout: Cloning into /var/lib/jenkins/workspace/build social...

stderr: Host key verification failed.
fatal: The remote end hung up unexpectedly

I have generated a key for the current user who installed jenkins and have managed to clone the repo using the git command line but jenkins can not.

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    I have added github to the known hosts and I have run out of solutions to try. Anyone know where I am going wrong? Is there a way to get jenkins to show the public key it’s using and I can debug if it’s using the correct one?

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    The error seems to be: host key verification failed.

    You should log into your Jenkins host as the Jenkins user and run:

    ssh git@github.com
    

    Then answer yes to the prompt about the host key. This only needs to be done once.

    Alternatively you could add “StrictHostKeyChecking no” to ~jenkins/.ssh/config.

    I’m using a single jenkins machine to check out multiple github repositories and had similar problems when setting it up. What I ended up doing was configuring an SSH config file for jenkins so that SSH would automatically know which id file to associate with each repository.

    /var/lib/jenkins/.ssh/config:

    Host github-ABC
      HostName github.com
      User git
      IdentityFile /var/lib/jenkins/.ssh/id_rsa_ABC
    

    In the Jenkins project config under source code management, I used this as the repository name:

    git@github-ABC:user/repo.git
    

    Finally, I use the SSH public key as a deploy key in the github repository.

    He following helped me:

    Login under Jenkins

    sudo su jenkins
    

    Copy your github key to Jenkins .ssh folder

    cp ~/.ssh/id_rsa_github* /var/lib/jenkins/.ssh/
    

    Raname the keys

    mv id_rsa_github id_rsa
    mv id_rsa_github.pub id_rsa.pub
    

    1) Switch User into your jenkins account

    su jenkins
    

    2) Create the key without a passphrase

    3) ssh git@github.com

    That worked perfectly for me.

    You may need to create a password for the jenkins account, if so use sudo passwd jenkins

    If you log in as jenkins you can do

    ssh -i ~/.ssh/id_rsa git@github.com

    where ~/.ssh/id_rsa is the path/to/your/ssh/key and it will prompt for the password and add to the known_hosts file

    You need to add the ssh key of jenkins to you github user.

    Generate ssh key

    Go to:

    Github->Settings(Top right)->SSH Keys(Left Pane)->Add SSH Key

    Git Baby is a git and github fan, let's start git clone.