What is Tomcat default password

In Apache tomcat user roles are configured in /conf/tomcat-users.xml file. By default we can see all user roles are commented in this xml file. To get the admin access add new user roles in tomcat-users.xml file

Example

<tomcat-users>
    <!--
  NOTE:  By default, no user is included in the "manager-gui" role required
  to operate the "/manager/html" web application.  If you wish to use this app,
  you must define such a user - the username and password are arbitrary.
-->
    <!--
  NOTE:  The sample user and role entries below are wrapped in a comment
  and thus are ignored when reading this file. Do not forget to remove
  <!.. ..> that surrounds them.
-->
    <!--
  <role rolename="tomcat"/>
  <role rolename="role1"/>
  <user username="tomcat" password="tomcat" roles="tomcat"/>
  <user username="both" password="tomcat" roles="tomcat,role1"/>
  <user username="role1" password="tomcat" roles="role1"/>
-->
    <user password="pretech" roles="manager-script,admin,manager-gui" username="pretech"/>
</tomcat-users>