How to get username and password for recently installed Jenkins?

Question

I have recently installed Jenkins on private server. Now when I have rebooted the server, it is asking for username and password. But, I have not given any such credentials. I have turned disable signup to false from true, but I am not able to restart my Jenkins as it is showing service not recognized.

Answer 1

If you have not set jenkins initial credential then it will be

• username: admin
• password: Go to your .jenkins/secrets/initialAdminPassword for password.

Answer 2

If you use Ubuntu, you can find initialAdminPassword using sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Answer 3

For all of you (like me) with jenkins.war under:

/var/lib/jenkins/

but not:

/var/lib/jenkins/secrets/initialAdminPassword

You have to start your jenkins server and then execute

sudo more /var/log/jenkins.log

you will see something like

*************************************************************
*************************************************************
*************************************************************

Jenkins initial setup is required. An admin user has been created and a password generated.
Please use the following password to proceed to installation:

64876418716348764921649873214

That's your password for user 'admin'.