manage jenkins don't appear on Jenkins
If you need to temporarily disable the security, so that you have admin access again, you can follow the steps on the disable security wiki page:
Stop Jenkins.
Go to$JENKINS_HOMEin the file system and findconfig.xml.
In this file, find the<useSecurity>true</useSecurity>element.
Replacetruewithfalse.
Remove the elementsauthorizationStrategyandsecurityRealm.
Start Jenkins.
The simplest solution is reset security.
Tomcat by default stores the user database in an XML file called $TOMCAT_HOME/conf/tomcat-users.xml. You can add the following lines to this file to create an admin user.<role rolename="admin"/><user username="jenkins-admin" password="secret" roles="admin"/>Then just restart Jenkins, go to admin panel and set everything once again.