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 w
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
sudo passwd jenkins