The description below uses $CATALINA_HOME to refer the
      base Tomcat directory. It is the directory in which you installed
      Tomcat, for example C:\tomcat8, or
      /usr/share/tomcat8.
    
      The Host Manager application requires a user with one of the following
      roles:
    
    
      - 
        admin-gui- use this role for the graphical web interface.
- 
        admin-script- use this role for the scripting web interface.
      To enable access to the HTML interface of the Host Manager application,
      either grant your Tomcat user the appropriate role, or create a new one with
      the correct role. For example, open
      ${CATALINA_BASE}/conf/tomcat-users.xml and enter the following:
    
    <user username="test" password="chang3m3N#w" roles="admin-gui"/>
      No further settings is needed. When you now access
      {server}:{port}/host-manager/html,you are able to
      log in with the created credentials.
    
    
      If you are using a different realm you will need to add the necessary role
      to the appropriate user(s) using the standard user management tools for
      that realm.