How to reset Jenkins security settings from the co

Question

Is there a way to reset all (or just disable the security settings) from the command line without a user/password as I have managed to completely lock myself out of Jenkins?

Answer 1

The answer on modifying was correct. Yet, I think it should be mentioned that /var/lib/jenkins/config.xml looks something like this if you have activated "Project-based Matrix Authorization Strategy". Deleting /var/lib/jenkins/config.xml and restarting jenkins also does the trick. I also deleted the users in /var/lib/jenkins/users to start from scratch.

<authorizationStrategy class="hudson.security.ProjectMatrixAuthorizationStrategy">
    <permission>hudson.model.Computer.Configure:jenkins-admin</permission>
    <permission>hudson.model.Computer.Connect:jenkins-admin</permission>
    <permission>hudson.model.Computer.Create:jenkins-admin</permission>
    <permission>hudson.model.Computer.Delete:jenkins-admin</permission>
    <permission>hudson.model.Computer.Disconnect:jenkins-admin</permission>
    <!-- if this is missing for your user and it is the only one, bad luck -->
    <permission>hudson.model.Hudson.Administer:jenkins-admin</permission>
    <permission>hudson.model.Hudson.Read:jenkins-admin</permission>
    <permission>hudson.model.Hudson.RunScripts:jenkins-admin</permission>
    <permission>hudson.model.Item.Build:jenkins-admin</permission>
    <permission>hudson.model.Item.Cancel:jenkins-admin</permission>
    <permission>hudson.model.Item.Configure:jenkins-admin</permission>
    <permission>hudson.model.Item.Create:jenkins-admin</permission>
    <permission>hudson.model.Item.Delete:jenkins-admin</permission>
    <permission>hudson.model.Item.Discover:jenkins-admin</permission>
    <permission>hudson.model.Item.Read:jenkins-admin</permission>
    <permission>hudson.model.Item.Workspace:jenkins-admin</permission>
    <permission>hudson.model.View.Configure:jenkins-admin</permission>
    <permission>hudson.model.View.Create:jenkins-admin</permission>
    <permission>hudson.model.View.Delete:jenkins-admin</permission>
    <permission>hudson.model.View.Read:jenkins-admin</permission>
  </authorizationStrategy>