删除/jenkins/config.xml中的以下内容：
<useSecurity>true</useSecurity> <authorizationStategy class="hudson.sucrity.FullControlOnceLoggedInAuthorizationStrategy"> ...... </authorizationStategy> <securityRealm class="hudson.security.HudsonPrivateSecurityRealm"> <disableSignup>false</disableSignup> .. </securityRealm>
重启服务：sudo service jenkins restart